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Fix compiler failing with nested with expression

Browse Source 
The previous implementation of `WithParser` used regex, which struggles
with parsing nested structures correctly. This commit improves
`WithParser` to track and parse all nested `with` expressions.

Other improvements:

- Throw meaningful errors when syntax is wrong. Replacing the prior
  behavior of silently ignoring such issues.
- Remove `I` prefix from related interfaces to align with newer code
  conventions.
- Add more unit tests for `with` expression.
- Improve documentation for templating.
- `ExpressionRegexBuilder`:
  - Use words `capture` and `match` correctly.
  - Fix minor issues revealed by new and improved tests:
     - Change regex for matching anything except surrounding
       whitespaces. The new regex ensures that it works even without
       having any preceeding text.
     - Change regex for capturing pipelines. The old regex was only
       matching (non-greedy) first character of the pipeline in tests,
       new regex matches the full pipeline.
- `ExpressionRegexBuilder.spec.ts`:
  - Ensure consistent way to define `describe` and `it` blocks.
  - Replace `expectRegex` tests, regex expectations test internal
    behavior of the class, not the external.
  - Simplified tests by eliminating the need for UUID suffixes/prefixes.
This commit is contained in:
undergroundwires
2023-10-25 19:39:12 +02:00
parent dfd4451561
commit 80821fca07
7 changed files with 976 additions and 421 deletions
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229
docs/templating.md
View File

@@ -2,79 +2,142 @@
## Benefits of templating
- Generating scripts by sharing code to increase best-practice usage and maintainability.
- Creating self-contained scripts without cross-dependencies.
- Use of pipes for writing cleaner code and letting pipes do dirty work.
- **Code sharing:** Share code across scripts for consistent practices and easier maintenance.
- **Script independence:** Generate self-contained scripts, eliminating the need for external code.
- **Cleaner code:** Use pipes for complex operations, resulting in more readable and streamlined code.
## Expressions
- Expressions start and end with mustaches (double brackets, `{{` and `}}`).
- E.g. `Hello {{ $name }} !`
- Syntax is close to [Go Templates ❤️](https://pkg.go.dev/text/template) but not the same.
- Functions enables usage of expressions.
- In script definition parts of a function, see [`Function`](./collection-files.md#Function).
- When doing a call as argument values, see [`FunctionCall`](./collection-files.md#Function).
- Expressions inside expressions (nested templates) are supported.
- An expression can output another expression that will also be compiled.
- E.g. following would compile first [with expression](#with), and then [parameter substitution](#parameter-substitution) in its output.
**Syntax:**
```go
{{ with $condition }}
echo {{ $text }}
{{ end }}
```
Expressions are enclosed within `{{` and `}}`.
Example: `Hello {{ $name }}!`.
They are a core component of templating, enhancing scripts with dynamic capabilities and functionality.
**Syntax similarity:**
The syntax shares similarities with [Go Templates ❤️](https://pkg.go.dev/text/template), but with some differences:
**Function definitions:**
You can use expressions in function definition.
Refer to [Function](./collection-files.md#function) for more details.
Example usage:
```yaml
name: GreetFunction
parameters:
- name: name
code: Hello {{ $name }}!
```
If you assign `name` the value `world`, invoking `GreetFunction` would result in `Hello world!`.
**Function arguments:**
You can also use expressions in arguments in nested function calls.
Refer to [`Function | collection-files.md`](./collection-files.md#functioncall) for more details.
Example with nested function calls:
```yaml
-
name: PrintMessageFunction
parameters:
- name: message
code: echo "{{ $message }}"
-
name: GreetUserFunction
parameters:
- name: userName
call:
name: PrintMessageFunction
parameters:
argument: 'Hello, {{ $userName }}!'
```
Here, if `userName` is `Alice`, invoking `GreetUserFunction` would execute `echo "Hello, Alice!"`.
**Nested templates:**
You can nest expressions inside expressions (also called "nested templates").
This means that an expression can output another expression where compiler will compile both.
For example, following would compile first [with expression](#with), and then [parameter substitution](#parameter-substitution) in its output:
```go
{{ with $condition }}
echo {{ $text }}
{{ end }}
```
### Parameter substitution
A simple function example:
Parameter substitution dynamically replaces variable references with their corresponding values in the script.
**Example function:**
```yaml
function: EchoArgument
name: DisplayTextFunction
parameters:
- name: 'argument'
code: Hello {{ $argument }} !
- name: 'text'
code: echo {{ $text }}
```
It would print "Hello world" if it's called in a [script](./collection-files.md#script) as following:
```yaml
script: Echo script
call:
function: EchoArgument
parameters:
argument: World
```
A function can call other functions such as:
```yaml
-
function: CallerFunction
parameters:
- name: 'value'
call:
function: EchoArgument
parameters:
argument: {{ $value }}
-
function: EchoArgument
parameters:
- name: 'argument'
code: Hello {{ $argument }} !
```
Invoking `DisplayTextFunction` with `text` set to `"Hello, world!"` would result in `echo "Hello, World!"`.
### with
Skips its "block" if the variable is absent or empty. Its "block" is between `with` start (`{{ with .. }}`) and end (`{{ end }`}) expressions.
E.g. `{{ with $parameterName }} Hi, I'm a block! {{ end }}` would only output `Hi, I'm a block!` if `parameterName` has any value..
The `with` expression enables conditional rendering and provides a context variable for simpler code.
It binds its context (value of the provided parameter value) as arbitrary `.` value. It allows you to use the argument value of the given parameter when it is provided and not empty such as:
**Optional block rendering:**
If the provided variable is falsy (`false`, `null`, or empty), the compiler skips the enclosed block of code.
A "block" lies between the with start (`{{ with .. }}`) and end (`{{ end }}`) expressions, defining its boundaries.
Example:
```go
{{ with $optionalVariable }}
Hello
{{ end }}
```
This would display `Hello` if `$optionalVariable` is truthy.
**Parameter declaration:**
You should set `optional: true` for the argument if you use it like `{{ with $argument }} .. {{ end }}`.
Declare parameters used for `with` condition as optional such as:
```yaml
name: ConditionalOutputFunction
parameters:
- name: 'data'
optional: true
code: |-
{{ with $data }}
Data is: {{ . }}
{{ end }}
```
**Context variable:**
`with` statement binds its context (value of the provided parameter value) as arbitrary `.` value.
`{{ . }}` syntax gives you access to the context variable.
This is optional to use, and not required to use `with` expressions.
For example:
```go
{{ with $parameterName }}Parameter value is {{ . }} here {{ end }}
```
It supports multiline text inside the block. You can have something like:
**Multiline text:**
It supports multiline text inside the block. You can write something like:
```go
{{ with $argument }}
@@ -83,7 +146,9 @@ It supports multiline text inside the block. You can have something like:
{{ end }}
```
You can also use other expressions inside its block, such as [parameter substitution](#parameter-substitution):
**Inner expressions:**
You can also embed other expressions inside its block, such as [parameter substitution](#parameter-substitution):
```go
{{ with $condition }}
@@ -91,32 +156,44 @@ You can also use other expressions inside its block, such as [parameter substitu
{{ end }}
```
💡 Declare parameters used for `with` condition as optional. Set `optional: true` for the argument if you use it like `{{ with $argument }} .. {{ end }}`.
This also includes nesting `with` statements:
Example:
```yaml
function: FunctionThatOutputsConditionally
parameters:
- name: 'argument'
optional: true
code: |-
{{ with $argument }}
Value is: {{ . }}
```go
{{ with $condition1 }}
Value of $condition1: {{ . }}
{{ with $condition2 }}
Value of $condition2: {{ . }}
{{ end }}
{{ end }}
```
### Pipes
- Pipes are functions available for handling text.
- Allows stacking actions one after another also known as "chaining".
- Like [Unix pipelines](https://en.wikipedia.org/wiki/Pipeline_(Unix)), the concept is simple: each pipeline's output becomes the input of the following pipe.
- You cannot create pipes. [A dedicated compiler](./application.md#parsing-and-compiling) provides pre-defined pipes to consume in collection files.
- You can combine pipes with other expressions such as [parameter substitution](#parameter-substitution) and [with](#with) syntax.
- ❗ Pipe names must be camelCase without any space or special characters.
- **Existing pipes**
- `inlinePowerShell`: Converts a multi-lined PowerShell script to a single line.
- `escapeDoubleQuotes`: Escapes `"` characters, allows you to use them inside double quotes (`"`).
- **Example usages**
- `{{ with $code }} echo "{{ . | inlinePowerShell }}" {{ end }}`
- `{{ with $code }} echo "{{ . | inlinePowerShell | escapeDoubleQuotes }}" {{ end }}`
Pipes are functions designed for text manipulation.
They allow for a sequential application of operations resembling [Unix pipelines](https://en.wikipedia.org/wiki/Pipeline_(Unix)), also known as "chaining".
Each pipeline's output becomes the input of the following pipe.
**Pre-defined**:
Pipes are pre-defined by the system.
You cannot create pipes in [collection files](./collection-files.md).
[A dedicated compiler](./application.md#parsing-and-compiling) provides pre-defined pipes to consume in collection files.
**Compatibility:**
You can combine pipes with other expressions such as [parameter substitution](#parameter-substitution) and [with](#with) syntax.
For example:
```go
{{ with $script }} echo "{{ . | inlinePowerShell | escapeDoubleQuotes }}" {{ end }}
```
**Naming:**
❗ Pipe names must be camelCase without any space or special characters.
**Available pipes:**
- `inlinePowerShell`: Converts a multi-lined PowerShell script to a single line.
- `escapeDoubleQuotes`: Escapes `"` characters for batch command execution, allows you to use them inside double quotes (`"`).

29
src/application/Parser/Script/Compiler/Expressions/Parser/Regex/ExpressionRegexBuilder.ts
View File

@@ -14,45 +14,44 @@ export class ExpressionRegexBuilder {
.addRawRegex('\\s+');
}
public matchPipeline() {
public captureOptionalPipeline() {
return this
.expectZeroOrMoreWhitespaces()
.addRawRegex('(\\|\\s*.+?)?');
.addRawRegex('((?:\\|\\s*\\b[a-zA-Z]+\\b\\s*)*)');
}
public matchUntilFirstWhitespace() {
public captureUntilWhitespaceOrPipe() {
return this
.addRawRegex('([^|\\s]+)');
}
public matchMultilineAnythingExceptSurroundingWhitespaces() {
public captureMultilineAnythingExceptSurroundingWhitespaces() {
return this
.expectZeroOrMoreWhitespaces()
.addRawRegex('([\\S\\s]+?)')
.expectZeroOrMoreWhitespaces();
.expectOptionalWhitespaces()
.addRawRegex('([\\s\\S]*\\S)')
.expectOptionalWhitespaces();
}
public expectExpressionStart() {
return this
.expectCharacters('{{')
.expectZeroOrMoreWhitespaces();
.expectOptionalWhitespaces();
}
public expectExpressionEnd() {
return this
.expectZeroOrMoreWhitespaces()
.expectOptionalWhitespaces()
.expectCharacters('}}');
}
public expectOptionalWhitespaces() {
return this
.addRawRegex('\\s*');
}
public buildRegExp(): RegExp {
return new RegExp(this.parts.join(''), 'g');
}
private expectZeroOrMoreWhitespaces() {
return this
.addRawRegex('\\s*');
}
private addRawRegex(regex: string) {
this.parts.push(regex);
return this;

5
src/application/Parser/Script/Compiler/Expressions/SyntaxParsers/ParameterSubstitutionParser.ts
View File

@@ -6,8 +6,9 @@ export class ParameterSubstitutionParser extends RegexParser {
protected readonly regex = new ExpressionRegexBuilder()
.expectExpressionStart()
.expectCharacters('$')
.matchUntilFirstWhitespace() // First match: Parameter name
.matchPipeline() // Second match: Pipeline
.captureUntilWhitespaceOrPipe() // First capture: Parameter name
.expectOptionalWhitespaces()
.captureOptionalPipeline() // Second capture: Pipeline
.expectExpressionEnd()
.buildRegExp();

231
src/application/Parser/Script/Compiler/Expressions/SyntaxParsers/WithParser.ts
View File

@@ -1,59 +1,222 @@
// eslint-disable-next-line max-classes-per-file
import { IExpressionParser } from '@/application/Parser/Script/Compiler/Expressions/Parser/IExpressionParser';
import { FunctionParameterCollection } from '@/application/Parser/Script/Compiler/Function/Parameter/FunctionParameterCollection';
import { FunctionParameter } from '@/application/Parser/Script/Compiler/Function/Parameter/FunctionParameter';
import { RegexParser, IPrimitiveExpression } from '../Parser/Regex/RegexParser';
import { IExpression } from '../Expression/IExpression';
import { ExpressionPosition } from '../Expression/ExpressionPosition';
import { ExpressionRegexBuilder } from '../Parser/Regex/ExpressionRegexBuilder';
export class WithParser extends RegexParser {
protected readonly regex = new ExpressionRegexBuilder()
// {{ with $parameterName }}
.expectExpressionStart()
.expectCharacters('with')
.expectOneOrMoreWhitespaces()
.expectCharacters('$')
.matchUntilFirstWhitespace() // First match: parameter name
.expectExpressionEnd()
// ...
.matchMultilineAnythingExceptSurroundingWhitespaces() // Second match: Scope text
// {{ end }}
.expectExpressionStart()
.expectCharacters('end')
.expectExpressionEnd()
.buildRegExp();
export class WithParser implements IExpressionParser {
public findExpressions(code: string): IExpression[] {
if (!code) {
throw new Error('missing code');
}
return parseWithExpressions(code);
}
}
protected buildExpression(match: RegExpMatchArray): IPrimitiveExpression {
const parameterName = match[1];
const scopeText = match[2];
enum WithStatementType {
Start,
End,
ContextVariable,
}
type WithStatement = {
readonly type: WithStatementType.Start;
readonly parameterName: string;
readonly position: ExpressionPosition;
} | {
readonly type: WithStatementType.End;
readonly position: ExpressionPosition;
} | {
readonly type: WithStatementType.ContextVariable;
readonly position: ExpressionPosition;
readonly pipeline: string | undefined;
};
function parseAllWithExpressions(
input: string,
): WithStatement[] {
const expressions = new Array<WithStatement>();
for (const match of input.matchAll(WithStatementStartRegEx)) {
expressions.push({
type: WithStatementType.Start,
parameterName: match[1],
position: createPosition(match),
});
}
for (const match of input.matchAll(WithStatementEndRegEx)) {
expressions.push({
type: WithStatementType.End,
position: createPosition(match),
});
}
for (const match of input.matchAll(ContextVariableWithPipelineRegEx)) {
expressions.push({
type: WithStatementType.ContextVariable,
position: createPosition(match),
pipeline: match[1],
});
}
return expressions;
}
function createPosition(match: RegExpMatchArray): ExpressionPosition {
const startPos = match.index;
const endPos = startPos + match[0].length;
return new ExpressionPosition(startPos, endPos);
}
class WithStatementBuilder {
private readonly contextVariables = new Array<{
readonly positionInScope: ExpressionPosition;
readonly pipeline: string | undefined;
}>();
public addContextVariable(
absolutePosition: ExpressionPosition,
pipeline: string | undefined,
): void {
const positionInScope = new ExpressionPosition(
absolutePosition.start - this.startExpressionPosition.end,
absolutePosition.end - this.startExpressionPosition.end,
);
this.contextVariables.push({
positionInScope,
pipeline,
});
}
public buildExpression(endExpressionPosition: ExpressionPosition, input: string): IExpression {
const parameters = new FunctionParameterCollection();
parameters.addParameter(new FunctionParameter(this.parameterName, true));
const position = new ExpressionPosition(
this.startExpressionPosition.start,
endExpressionPosition.end,
);
const scope = input.substring(this.startExpressionPosition.end, endExpressionPosition.start);
return {
parameters: [new FunctionParameter(parameterName, true)],
evaluator: (context) => {
const argumentValue = context.args.hasArgument(parameterName)
? context.args.getArgument(parameterName).argumentValue
parameters,
position,
evaluate: (context) => {
const argumentValue = context.args.hasArgument(this.parameterName)
? context.args.getArgument(this.parameterName).argumentValue
: undefined;
if (!argumentValue) {
return '';
}
return replaceEachScopeSubstitution(scopeText, (pipeline) => {
const substitutedScope = this.substituteContextVariables(scope, (pipeline) => {
if (!pipeline) {
return argumentValue;
}
return context.pipelineCompiler.compile(argumentValue, pipeline);
});
return substitutedScope;
},
};
}
constructor(
private readonly startExpressionPosition: ExpressionPosition,
private readonly parameterName: string,
) {
}
private substituteContextVariables(
scope: string,
substituter: (pipeline: string) => string,
): string {
if (!this.contextVariables.length) {
return scope;
}
let substitutedScope = '';
let scopeSubstrIndex = 0;
for (const contextVariable of this.contextVariables) {
substitutedScope += scope.substring(scopeSubstrIndex, contextVariable.positionInScope.start);
substitutedScope += substituter(contextVariable.pipeline);
scopeSubstrIndex = contextVariable.positionInScope.end;
}
substitutedScope += scope.substring(scopeSubstrIndex, scope.length);
return substitutedScope;
}
}
const ScopeSubstitutionRegEx = new ExpressionRegexBuilder()
function buildErrorContext(code: string, statements: readonly WithStatement[]): string {
const formattedStatements = statements.map((s) => `- [${s.position.start}, ${s.position.end}] ${WithStatementType[s.type]}`).join('\n');
return [
'Code:', '---', code, '---',
'nStatements:', '---', formattedStatements, '---',
].join('\n');
}
function parseWithExpressions(input: string): IExpression[] {
const allStatements = parseAllWithExpressions(input);
const sortedStatements = allStatements
.slice()
.sort((a, b) => b.position.start - a.position.start);
const expressions = new Array<IExpression>();
const builders = new Array<WithStatementBuilder>();
const throwWithContext = (message: string) => {
throw new Error(`${message}\n${buildErrorContext(input, allStatements)}}`);
};
while (sortedStatements.length > 0) {
const statement = sortedStatements.pop();
if (!statement) {
break;
}
switch (statement.type) { // eslint-disable-line default-case
case WithStatementType.Start:
builders.push(new WithStatementBuilder(
statement.position,
statement.parameterName,
));
break;
case WithStatementType.ContextVariable:
if (builders.length === 0) {
throwWithContext('Context variable before `with` statement.');
}
builders[builders.length - 1].addContextVariable(statement.position, statement.pipeline);
break;
case WithStatementType.End:
if (builders.length === 0) {
throwWithContext('Redundant `end` statement, missing `with`?');
}
expressions.push(builders.pop().buildExpression(statement.position, input));
break;
}
}
if (builders.length > 0) {
throwWithContext('Missing `end` statement, forgot `{{ end }}?');
}
return expressions;
}
const ContextVariableWithPipelineRegEx = new ExpressionRegexBuilder()
// {{ . | pipeName }}
.expectExpressionStart()
.expectCharacters('.')
.matchPipeline() // First match: pipeline
.expectOptionalWhitespaces()
.captureOptionalPipeline() // First capture: pipeline
.expectExpressionEnd()
.buildRegExp();
function replaceEachScopeSubstitution(scopeText: string, replacer: (pipeline: string) => string) {
// Not using /{{\s*.\s*(?:(\|\s*[^{}]*?)\s*)?}}/g for not matching brackets,
// but instead letting the pipeline compiler to fail on those.
return scopeText.replaceAll(ScopeSubstitutionRegEx, (_$, match1) => {
return replacer(match1);
});
}
const WithStatementStartRegEx = new ExpressionRegexBuilder()
// {{ with $parameterName }}
.expectExpressionStart()
.expectCharacters('with')
.expectOneOrMoreWhitespaces()
.expectCharacters('$')
.captureUntilWhitespaceOrPipe() // First capture: parameter name
.expectExpressionEnd()
.expectOptionalWhitespaces()
.buildRegExp();
const WithStatementEndRegEx = new ExpressionRegexBuilder()
// {{ end }}
.expectOptionalWhitespaces()
.expectExpressionStart()
.expectCharacters('end')
.expectOptionalWhitespaces()
.expectExpressionEnd()
.buildRegExp();

529
tests/unit/application/Parser/Script/Compiler/Expressions/Parser/Regex/ExpressionRegexBuilder.spec.ts
View File

@@ -1,126 +1,295 @@
import { randomUUID } from 'crypto';
import { describe, it, expect } from 'vitest';
import { ExpressionRegexBuilder } from '@/application/Parser/Script/Compiler/Expressions/Parser/Regex/ExpressionRegexBuilder';
const AllWhitespaceCharacters = ' \t\n\r\v\f\u00A0';
describe('ExpressionRegexBuilder', () => {
describe('expectCharacters', () => {
describe('escape single as expected', () => {
const charactersToEscape = ['.', '$'];
for (const character of charactersToEscape) {
it(character, () => {
expectRegex(
// act
describe('expectCharacters', () => {
describe('escapes single character as expected', () => {
const charactersToEscape = ['.', '$'];
for (const character of charactersToEscape) {
it(`escapes ${character} as expected`, () => expectMatch(
character,
(act) => act.expectCharacters(character),
// assert
`\\${character}`,
);
});
}
});
it('escapes multiple as expected', () => {
expectRegex(
// act
`${character}`,
));
}
});
it('escapes multiple characters as expected', () => expectMatch(
'.I have no $$.',
(act) => act.expectCharacters('.I have no $$.'),
// assert
'\\.I have no \\$\\$\\.',
);
});
it('adds as expected', () => {
expectRegex(
// act
(act) => act.expectCharacters('return as it is'),
// assert
'.I have no $$.',
));
it('adds characters as expected', () => expectMatch(
'return as it is',
);
(act) => act.expectCharacters('return as it is'),
'return as it is',
));
});
});
it('expectOneOrMoreWhitespaces', () => {
expectRegex(
// act
describe('expectOneOrMoreWhitespaces', () => {
it('matches one whitespace', () => expectMatch(
' ',
(act) => act.expectOneOrMoreWhitespaces(),
// assert
'\\s+',
);
' ',
));
it('matches multiple whitespaces', () => expectMatch(
AllWhitespaceCharacters,
(act) => act.expectOneOrMoreWhitespaces(),
AllWhitespaceCharacters,
));
it('matches whitespaces inside text', () => expectMatch(
`start${AllWhitespaceCharacters}end`,
(act) => act.expectOneOrMoreWhitespaces(),
AllWhitespaceCharacters,
));
it('does not match non-whitespace characters', () => expectNonMatch(
'a',
(act) => act.expectOneOrMoreWhitespaces(),
));
});
it('matchPipeline', () => {
expectRegex(
// act
(act) => act.matchPipeline(),
// assert
'\\s*(\\|\\s*.+?)?',
);
describe('captureOptionalPipeline', () => {
it('does not capture when no pipe is present', () => expectNonMatch(
'noPipeHere',
(act) => act.captureOptionalPipeline(),
));
it('captures when input starts with pipe', () => expectCapture(
'| afterPipe',
(act) => act.captureOptionalPipeline(),
'| afterPipe',
));
it('ignores without text before', () => expectCapture(
'stuff before | afterPipe',
(act) => act.captureOptionalPipeline(),
'| afterPipe',
));
it('ignores without text before', () => expectCapture(
'stuff before | afterPipe',
(act) => act.captureOptionalPipeline(),
'| afterPipe',
));
it('ignores whitespaces before the pipe', () => expectCapture(
' | afterPipe',
(act) => act.captureOptionalPipeline(),
'| afterPipe',
));
it('ignores text after whitespace', () => expectCapture(
'| first Pipe',
(act) => act.captureOptionalPipeline(),
'| first ',
));
describe('non-greedy matching', () => { // so the rest of the pattern can work
it('non-letter character in pipe', () => expectCapture(
'| firstPipe | sec0ndpipe',
(act) => act.captureOptionalPipeline(),
'| firstPipe ',
));
});
});
it('matchUntilFirstWhitespace', () => {
expectRegex(
// act
(act) => act.matchUntilFirstWhitespace(),
// assert
'([^|\\s]+)',
);
it('matches until first whitespace', () => expectMatch(
describe('captureUntilWhitespaceOrPipe', () => {
it('captures until first whitespace', () => expectCapture(
// arrange
'first second',
'first ',
// act
(act) => act.matchUntilFirstWhitespace(),
(act) => act.captureUntilWhitespaceOrPipe(),
// assert
'first',
));
});
describe('matchMultilineAnythingExceptSurroundingWhitespaces', () => {
it('returns expected regex', () => expectRegex(
// act
(act) => act.matchMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'\\s*([\\S\\s]+?)\\s*',
));
it('matches single line', () => expectMatch(
it('captures until first pipe', () => expectCapture(
// arrange
'single line',
'first|',
// act
(act) => act.matchMultilineAnythingExceptSurroundingWhitespaces(),
(act) => act.captureUntilWhitespaceOrPipe(),
// assert
'single line',
'first',
));
it('matches single line without surrounding whitespaces', () => expectMatch(
it('captures all without whitespace or pipe', () => expectCapture(
// arrange
' single line\t',
'all',
// act
(act) => act.matchMultilineAnythingExceptSurroundingWhitespaces(),
(act) => act.captureUntilWhitespaceOrPipe(),
// assert
'single line',
));
it('matches multiple lines', () => expectMatch(
// arrange
'first line\nsecond line',
// act
(act) => act.matchMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'first line\nsecond line',
));
it('matches multiple lines without surrounding whitespaces', () => expectMatch(
// arrange
' first line\nsecond line\t',
// act
(act) => act.matchMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'first line\nsecond line',
'all',
));
});
it('expectExpressionStart', () => {
expectRegex(
// act
describe('captureMultilineAnythingExceptSurroundingWhitespaces', () => {
describe('single line', () => {
it('captures a line without surrounding whitespaces', () => expectCapture(
// arrange
'line',
// act
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'line',
));
it('captures a line with internal whitespaces intact', () => expectCapture(
`start${AllWhitespaceCharacters}end`,
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
`start${AllWhitespaceCharacters}end`,
));
it('excludes surrounding whitespaces', () => expectCapture(
// arrange
`${AllWhitespaceCharacters}single line\t`,
// act
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'single line',
));
});
describe('multiple lines', () => {
it('captures text across multiple lines', () => expectCapture(
// arrange
'first line\nsecond line\r\nthird-line',
// act
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'first line\nsecond line\r\nthird-line',
));
it('captures text with empty lines in between', () => expectCapture(
'start\n\nend',
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
'start\n\nend',
));
it('excludes surrounding whitespaces from multiline text', () => expectCapture(
// arrange
` first line\nsecond line${AllWhitespaceCharacters}`,
// act
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
// assert
'first line\nsecond line',
));
});
describe('edge cases', () => {
it('does not capture for input with only whitespaces', () => expectNonCapture(
AllWhitespaceCharacters,
(act) => act.captureMultilineAnythingExceptSurroundingWhitespaces(),
));
});
});
describe('expectExpressionStart', () => {
it('matches expression start without trailing whitespaces', () => expectMatch(
'{{expression',
(act) => act.expectExpressionStart(),
// assert
'{{\\s*',
);
'{{',
));
it('matches expression start with trailing whitespaces', () => expectMatch(
`{{${AllWhitespaceCharacters}expression`,
(act) => act.expectExpressionStart(),
`{{${AllWhitespaceCharacters}`,
));
it('does not match whitespaces not directly after expression start', () => expectMatch(
' {{expression',
(act) => act.expectExpressionStart(),
'{{',
));
it('does not match if expression start is not present', () => expectNonMatch(
'noExpressionStartHere',
(act) => act.expectExpressionStart(),
));
});
it('expectExpressionEnd', () => {
expectRegex(
// act
describe('expectExpressionEnd', () => {
it('matches expression end without preceding whitespaces', () => expectMatch(
'expression}}',
(act) => act.expectExpressionEnd(),
// assert
'\\s*}}',
);
'}}',
));
it('matches expression end with preceding whitespaces', () => expectMatch(
`expression${AllWhitespaceCharacters}}}`,
(act) => act.expectExpressionEnd(),
`${AllWhitespaceCharacters}}}`,
));
it('does not capture whitespaces not directly before expression end', () => expectMatch(
'expression}} ',
(act) => act.expectExpressionEnd(),
'}}',
));
it('does not match if expression end is not present', () => expectNonMatch(
'noExpressionEndHere',
(act) => act.expectExpressionEnd(),
));
});
describe('expectOptionalWhitespaces', () => {
describe('matching', () => {
it('matches multiple Unix lines', () => expectMatch(
// arrange
'\n\n',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\n\n',
));
it('matches multiple Windows lines', () => expectMatch(
// arrange
'\r\n',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\r\n',
));
it('matches multiple spaces', () => expectMatch(
// arrange
' ',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
' ',
));
it('matches horizontal and vertical tabs', () => expectMatch(
// arrange
'\t\v',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\t\v',
));
it('matches form feed character', () => expectMatch(
// arrange
'\f',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\f',
));
it('matches a non-breaking space character', () => expectMatch(
// arrange
'\u00A0',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\u00A0',
));
it('matches a combination of whitespace characters', () => expectMatch(
// arrange
AllWhitespaceCharacters,
// act
(act) => act.expectOptionalWhitespaces(),
// assert
AllWhitespaceCharacters,
));
it('matches whitespace characters on different positions', () => expectMatch(
// arrange
'\ta\nb\rc\v',
// act
(act) => act.expectOptionalWhitespaces(),
// assert
'\t\n\r\v',
));
});
describe('non-matching', () => {
it('a non-whitespace character', () => expectNonMatch(
// arrange
'a',
// act
(act) => act.expectOptionalWhitespaces(),
));
it('multiple non-whitespace characters', () => expectNonMatch(
// arrange
'abc',
// act
(act) => act.expectOptionalWhitespaces(),
));
});
});
describe('buildRegExp', () => {
it('sets global flag', () => {
@@ -134,84 +303,126 @@ describe('ExpressionRegexBuilder', () => {
expect(actual).to.equal(expected);
});
describe('can combine multiple parts', () => {
it('with', () => {
expectRegex(
(sut) => sut
// act
// {{ with $variable }}
.expectExpressionStart()
.expectCharacters('with')
.expectOneOrMoreWhitespaces()
.expectCharacters('$')
.matchUntilFirstWhitespace()
.expectExpressionEnd()
// scope
.matchMultilineAnythingExceptSurroundingWhitespaces()
// {{ end }}
.expectExpressionStart()
.expectCharacters('end')
.expectExpressionEnd(),
// assert
'{{\\s*with\\s+\\$([^|\\s]+)\\s*}}\\s*([\\S\\s]+?)\\s*{{\\s*end\\s*}}',
);
});
it('scoped substitution', () => {
expectRegex(
(sut) => sut
// act
.expectExpressionStart().expectCharacters('.')
.matchPipeline()
.expectExpressionEnd(),
// assert
'{{\\s*\\.\\s*(\\|\\s*.+?)?\\s*}}',
);
});
it('parameter substitution', () => {
expectRegex(
(sut) => sut
// act
.expectExpressionStart().expectCharacters('$')
.matchUntilFirstWhitespace()
.matchPipeline()
.expectExpressionEnd(),
// assert
'{{\\s*\\$([^|\\s]+)\\s*(\\|\\s*.+?)?\\s*}}',
);
});
it('combines character and whitespace expectations', () => expectMatch(
'abc def',
(act) => act
.expectCharacters('abc')
.expectOneOrMoreWhitespaces()
.expectCharacters('def'),
'abc def',
));
it('captures optional pipeline and text after it', () => expectCapture(
'abc | def',
(act) => act
.expectCharacters('abc ')
.captureOptionalPipeline(),
'| def',
));
it('combines multiline capture with optional whitespaces', () => expectCapture(
'\n abc \n',
(act) => act
.expectOptionalWhitespaces()
.captureMultilineAnythingExceptSurroundingWhitespaces()
.expectOptionalWhitespaces(),
'abc',
));
it('combines expression start, optional whitespaces, and character expectation', () => expectMatch(
'{{ abc',
(act) => act
.expectExpressionStart()
.expectOptionalWhitespaces()
.expectCharacters('abc'),
'{{ abc',
));
it('combines character expectation, optional whitespaces, and expression end', () => expectMatch(
'abc }}',
(act) => act
.expectCharacters('abc')
.expectOptionalWhitespaces()
.expectExpressionEnd(),
'abc }}',
));
});
});
});
function expectRegex(
act: (sut: ExpressionRegexBuilder) => ExpressionRegexBuilder,
expected: string,
) {
enum MatchGroupIndex {
FullMatch = 0,
FirstCapturingGroup = 1,
}
function expectCapture(
input: string,
act: (regexBuilder: ExpressionRegexBuilder) => ExpressionRegexBuilder,
expectedCombinedCaptures: string | undefined,
): void {
// arrange
const sut = new ExpressionRegexBuilder();
const matchGroupIndex = MatchGroupIndex.FirstCapturingGroup;
// act
const actual = act(sut).buildRegExp().source;
// assert
expect(actual).to.equal(expected);
expectMatch(input, act, expectedCombinedCaptures, matchGroupIndex);
}
function expectNonMatch(
input: string,
act: (sut: ExpressionRegexBuilder) => ExpressionRegexBuilder,
matchGroupIndex = MatchGroupIndex.FullMatch,
): void {
expectMatch(input, act, undefined, matchGroupIndex);
}
function expectNonCapture(
input: string,
act: (sut: ExpressionRegexBuilder) => ExpressionRegexBuilder,
): void {
expectNonMatch(input, act, MatchGroupIndex.FirstCapturingGroup);
}
function expectMatch(
input: string,
act: (sut: ExpressionRegexBuilder) => ExpressionRegexBuilder,
expectedMatch: string,
) {
act: (regexBuilder: ExpressionRegexBuilder) => ExpressionRegexBuilder,
expectedCombinedMatches: string | undefined,
matchGroupIndex = MatchGroupIndex.FullMatch,
): void {
// arrange
const [startMarker, endMarker] = [randomUUID(), randomUUID()];
const markedInput = `${startMarker}${input}${endMarker}`;
const builder = new ExpressionRegexBuilder()
.expectCharacters(startMarker);
act(builder);
const markedRegex = builder.expectCharacters(endMarker).buildRegExp();
const regexBuilder = new ExpressionRegexBuilder();
act(regexBuilder);
const regex = regexBuilder.buildRegExp();
// act
const match = Array.from(markedInput.matchAll(markedRegex))
.filter((matches) => matches.length > 1)
.map((matches) => matches[1])
.filter(Boolean)
.join();
const allMatchGroups = Array.from(input.matchAll(regex));
// assert
expect(match).to.equal(expectedMatch);
const actualMatches = allMatchGroups
.filter((matches) => matches.length > matchGroupIndex)
.map((matches) => matches[matchGroupIndex])
.filter(Boolean) // matchAll returns `""` for full matches, `null` for capture groups
.flat();
const actualCombinedMatches = actualMatches.length ? actualMatches.join('') : undefined;
expect(actualCombinedMatches).equal(
expectedCombinedMatches,
[
'\n\n---',
'Expected combined matches:',
getTestDataText(expectedCombinedMatches),
'Actual combined matches:',
getTestDataText(actualCombinedMatches),
'Input:',
getTestDataText(input),
'Regex:',
getTestDataText(regex.toString()),
'All match groups:',
getTestDataText(JSON.stringify(allMatchGroups)),
`Match index in group: ${matchGroupIndex}`,
'---\n\n',
].join('\n'),
);
}
function getTestDataText(data: string | undefined): string {
const outputPrefix = '\t> ';
if (data === undefined) {
return `${outputPrefix}undefined (no matches)`;
}
const getLiteralString = (text: string) => JSON.stringify(text).slice(1, -1);
const text = `${outputPrefix}\`${getLiteralString(data)}\``;
return text;
}

86
tests/unit/application/Parser/Script/Compiler/Expressions/SyntaxParsers/SyntaxParserTestsRunner.ts
View File

@@ -4,25 +4,26 @@ import { IExpressionParser } from '@/application/Parser/Script/Compiler/Expressi
import { FunctionCallArgumentCollectionStub } from '@tests/unit/shared/Stubs/FunctionCallArgumentCollectionStub';
import { ExpressionEvaluationContextStub } from '@tests/unit/shared/Stubs/ExpressionEvaluationContextStub';
import { PipelineCompilerStub } from '@tests/unit/shared/Stubs/PipelineCompilerStub';
import { scrambledEqual } from '@/application/Common/Array';
export class SyntaxParserTestsRunner {
constructor(private readonly sut: IExpressionParser) {
}
public expectPosition(...testCases: IExpectPositionTestCase[]) {
public expectPosition(...testCases: ExpectPositionTestScenario[]) {
for (const testCase of testCases) {
it(testCase.name, () => {
// act
const expressions = this.sut.findExpressions(testCase.code);
// assert
const actual = expressions.map((e) => e.position);
expect(actual).to.deep.equal(testCase.expected);
expect(scrambledEqual(actual, testCase.expected));
});
}
return this;
}
public expectNoMatch(...testCases: INoMatchTestCase[]) {
public expectNoMatch(...testCases: NoMatchTestScenario[]) {
this.expectPosition(...testCases.map((testCase) => ({
name: testCase.name,
code: testCase.code,
@@ -30,7 +31,7 @@ export class SyntaxParserTestsRunner {
})));
}
public expectResults(...testCases: IExpectResultTestCase[]) {
public expectResults(...testCases: ExpectResultTestScenario[]) {
for (const testCase of testCases) {
it(testCase.name, () => {
// arrange
@@ -47,7 +48,21 @@ export class SyntaxParserTestsRunner {
return this;
}
public expectPipeHits(data: IExpectPipeHitTestData) {
public expectThrows(...testCases: ExpectThrowsTestScenario[]) {
for (const testCase of testCases) {
it(testCase.name, () => {
// arrange
const { expectedError } = testCase;
// act
const act = () => this.sut.findExpressions(testCase.code);
// assert
expect(act).to.throw(expectedError);
});
}
return this;
}
public expectPipeHits(data: ExpectPipeHitTestScenario) {
for (const validPipePart of PipeTestCases.ValidValues) {
this.expectHitPipePart(validPipePart, data);
}
@@ -56,7 +71,7 @@ export class SyntaxParserTestsRunner {
}
}
private expectHitPipePart(pipeline: string, data: IExpectPipeHitTestData) {
private expectHitPipePart(pipeline: string, data: ExpectPipeHitTestScenario) {
it(`"${pipeline}" hits`, () => {
// arrange
const expectedPipePart = pipeline.trim();
@@ -73,14 +88,14 @@ export class SyntaxParserTestsRunner {
// assert
expect(expressions).has.lengthOf(1);
expect(pipelineCompiler.compileHistory).has.lengthOf(1);
const actualPipeNames = pipelineCompiler.compileHistory[0].pipeline;
const actualPipePart = pipelineCompiler.compileHistory[0].pipeline;
const actualValue = pipelineCompiler.compileHistory[0].value;
expect(actualPipeNames).to.equal(expectedPipePart);
expect(actualPipePart).to.equal(expectedPipePart);
expect(actualValue).to.equal(data.parameterValue);
});
}
private expectMissPipePart(pipeline: string, data: IExpectPipeHitTestData) {
private expectMissPipePart(pipeline: string, data: ExpectPipeHitTestScenario) {
it(`"${pipeline}" misses`, () => {
// arrange
const args = new FunctionCallArgumentCollectionStub()
@@ -98,42 +113,51 @@ export class SyntaxParserTestsRunner {
});
}
}
interface IExpectResultTestCase {
name: string;
code: string;
args: (builder: FunctionCallArgumentCollectionStub) => FunctionCallArgumentCollectionStub;
expected: readonly string[];
interface ExpectResultTestScenario {
readonly name: string;
readonly code: string;
readonly args: (
builder: FunctionCallArgumentCollectionStub,
) => FunctionCallArgumentCollectionStub;
readonly expected: readonly string[];
}
interface IExpectPositionTestCase {
name: string;
code: string;
expected: readonly ExpressionPosition[];
interface ExpectThrowsTestScenario {
readonly name: string;
readonly code: string;
readonly expectedError: string;
}
interface INoMatchTestCase {
name: string;
code: string;
interface ExpectPositionTestScenario {
readonly name: string;
readonly code: string;
readonly expected: readonly ExpressionPosition[];
}
interface IExpectPipeHitTestData {
codeBuilder: (pipeline: string) => string;
parameterName: string;
parameterValue: string;
interface NoMatchTestScenario {
readonly name: string;
readonly code: string;
}
interface ExpectPipeHitTestScenario {
readonly codeBuilder: (pipeline: string) => string;
readonly parameterName: string;
readonly parameterValue: string;
}
const PipeTestCases = {
ValidValues: [
// Single pipe with different whitespace combinations
' | pipe1', ' |pipe1', '|pipe1', ' |pipe1', ' | pipe1',
' | pipe', ' |pipe', '|pipe', ' |pipe', ' | pipe',
// Double pipes with different whitespace combinations
' | pipe1 | pipe2', '| pipe1|pipe2', '|pipe1|pipe2', ' |pipe1 |pipe2', '| pipe1 | pipe2| pipe3 |pipe4',
// Wrong cases, but should match anyway and let pipelineCompiler throw errors
'| pip€', '| pip{e} ',
' | pipeFirst | pipeSecond', '| pipeFirst|pipeSecond', '|pipeFirst|pipeSecond', ' |pipeFirst |pipeSecond', '| pipeFirst | pipeSecond| pipeThird |pipeFourth',
],
InvalidValues: [
' pipe1 |pipe2', ' pipe1',
' withoutPipeBefore |pipe', ' withoutPipeBefore',
// It's OK to match them (move to valid values if needed) to let compiler throw instead.
'| pip€', '| pip{e} ', '| pipeWithNumber55', '| pipe with whitespace',
],
};

288
tests/unit/application/Parser/Script/Compiler/Expressions/SyntaxParsers/WithParser.spec.ts
View File

@@ -7,15 +7,15 @@ import { SyntaxParserTestsRunner } from './SyntaxParserTestsRunner';
describe('WithParser', () => {
const sut = new WithParser();
const runner = new SyntaxParserTestsRunner(sut);
describe('finds as expected', () => {
describe('correctly identifies `with` syntax', () => {
runner.expectPosition(
{
name: 'when no scope is not used',
name: 'when no context variable is not used',
code: 'hello {{ with $parameter }}no usage{{ end }} here',
expected: [new ExpressionPosition(6, 44)],
},
{
name: 'when scope is used',
name: 'when context variable is used',
code: 'used here ({{ with $parameter }}value: {{.}}{{ end }})',
expected: [new ExpressionPosition(11, 53)],
},
@@ -25,38 +25,70 @@ describe('WithParser', () => {
expected: [new ExpressionPosition(7, 51), new ExpressionPosition(61, 99)],
},
{
name: 'tolerate lack of whitespaces',
name: 'when nested',
code: 'outer: {{ with $outer }}outer value with context variable: {{ . }}, inner: {{ with $inner }}inner value{{ end }}.{{ end }}',
expected: [
/* outer: */ new ExpressionPosition(7, 122),
/* inner: */ new ExpressionPosition(77, 112),
],
},
{
name: 'whitespaces: tolerate lack of whitespaces',
code: 'no whitespaces {{with $parameter}}value: {{ . }}{{end}}',
expected: [new ExpressionPosition(15, 55)],
},
{
name: 'match multiline text',
name: 'newlines: match multiline text',
code: 'non related line\n{{ with $middleLine }}\nline before value\n{{ . }}\nline after value\n{{ end }}\nnon related line',
expected: [new ExpressionPosition(17, 92)],
},
{
name: 'newlines: does not match newlines before',
code: '\n{{ with $unimportant }}Text{{ end }}',
expected: [new ExpressionPosition(1, 37)],
},
{
name: 'newlines: does not match newlines after',
code: '{{ with $unimportant }}Text{{ end }}\n',
expected: [new ExpressionPosition(0, 36)],
},
);
});
describe('throws with incorrect `with` syntax', () => {
runner.expectThrows(
{
name: 'incorrect `with`: whitespace after dollar sign inside `with` statement',
code: '{{with $ parameter}}value: {{ . }}{{ end }}',
expectedError: 'Context variable before `with` statement.',
},
{
name: 'incorrect `with`: whitespace before dollar sign inside `with` statement',
code: '{{ with$parameter}}value: {{ . }}{{ end }}',
expectedError: 'Context variable before `with` statement.',
},
{
name: 'incorrect `with`: missing `with` statement',
code: '{{ when $parameter}}value: {{ . }}{{ end }}',
expectedError: 'Context variable before `with` statement.',
},
{
name: 'incorrect `end`: missing `end` statement',
code: '{{ with $parameter}}value: {{ . }}{{ fin }}',
expectedError: 'Missing `end` statement, forgot `{{ end }}?',
},
{
name: 'incorrect `end`: used without `with`',
code: 'Value {{ end }}',
expectedError: 'Redundant `end` statement, missing `with`?',
},
{
name: 'incorrect "context variable": used without `with`',
code: 'Value: {{ . }}',
expectedError: 'Context variable before `with` statement.',
},
);
});
describe('ignores when syntax is wrong', () => {
describe('ignores expression if "with" syntax is wrong', () => {
runner.expectNoMatch(
{
name: 'does not tolerate whitespace after with',
code: '{{with $ parameter}}value: {{ . }}{{ end }}',
},
{
name: 'does not tolerate whitespace before dollar',
code: '{{ with$parameter}}value: {{ . }}{{ end }}',
},
{
name: 'wrong text at scope end',
code: '{{ with$parameter}}value: {{ . }}{{ fin }}',
},
{
name: 'wrong text at expression start',
code: '{{ when $parameter}}value: {{ . }}{{ end }}',
},
);
});
describe('does not render argument if substitution syntax is wrong', () => {
runner.expectResults(
{
@@ -83,54 +115,73 @@ describe('WithParser', () => {
);
});
});
describe('renders scope conditionally', () => {
describe('does not render scope if argument is undefined', () => {
runner.expectResults(
...getAbsentStringTestCases().map((testCase) => ({
name: `does not render when value is "${testCase.valueName}"`,
code: '{{ with $parameter }}dark{{ end }} ',
args: (args) => args
.withArgument('parameter', testCase.absentValue),
expected: [''],
})),
{
name: 'does not render when argument is not provided',
code: '{{ with $parameter }}dark{{ end }}',
args: (args) => args,
expected: [''],
},
);
describe('scope rendering', () => {
describe('conditional rendering based on argument value', () => {
describe('does not render scope', () => {
runner.expectResults(
...getAbsentStringTestCases().map((testCase) => ({
name: `does not render when value is "${testCase.valueName}"`,
code: '{{ with $parameter }}dark{{ end }} ',
args: (args) => args
.withArgument('parameter', testCase.absentValue),
expected: [''],
})),
{
name: 'does not render when argument is not provided',
code: '{{ with $parameter }}dark{{ end }}',
args: (args) => args,
expected: [''],
},
);
});
describe('renders scope', () => {
runner.expectResults(
...getAbsentStringTestCases().map((testCase) => ({
name: `does not render when value is "${testCase.valueName}"`,
code: '{{ with $parameter }}dark{{ end }} ',
args: (args) => args
.withArgument('parameter', testCase.absentValue),
expected: [''],
})),
{
name: 'does not render when argument is not provided',
code: '{{ with $parameter }}dark{{ end }}',
args: (args) => args,
expected: [''],
},
{
name: 'renders scope even if value is not used',
code: '{{ with $parameter }}Hello world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value when it has value',
code: '{{ with $parameter }}{{ . }} world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value when whitespaces around brackets are missing',
code: '{{ with $parameter }}{{.}} world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value multiple times when it\'s used multiple times',
code: '{{ with $letterL }}He{{ . }}{{ . }}o wor{{ . }}d!{{ end }}',
args: (args) => args
.withArgument('letterL', 'l'),
expected: ['Hello world!'],
},
);
});
});
describe('render scope when variable has value', () => {
describe('whitespace handling inside scope', () => {
runner.expectResults(
{
name: 'renders scope even if value is not used',
code: '{{ with $parameter }}Hello world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value when it has value',
code: '{{ with $parameter }}{{ . }} world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value when whitespaces around brackets are missing',
code: '{{ with $parameter }}{{.}} world!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello'),
expected: ['Hello world!'],
},
{
name: 'renders value multiple times when it\'s used multiple times',
code: '{{ with $letterL }}He{{ . }}{{ . }}o wor{{ . }}d!{{ end }}',
args: (args) => args
.withArgument('letterL', 'l'),
expected: ['Hello world!'],
},
{
name: 'renders value in multi-lined text',
code: '{{ with $middleLine }}line before value\n{{ . }}\nline after value{{ end }}',
@@ -145,42 +196,71 @@ describe('WithParser', () => {
.withArgument('middleLine', 'value line'),
expected: ['line before value\nvalue line\nline after value'],
},
{
name: 'does not render trailing whitespace after value',
code: '{{ with $parameter }}{{ . }}! {{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render trailing newline after value',
code: '{{ with $parameter }}{{ . }}!\r\n{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render leading newline before value',
code: '{{ with $parameter }}\r\n{{ . }}!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render leading whitespaces before value',
code: '{{ with $parameter }} {{ . }}!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render leading newline and whitespaces before value',
code: '{{ with $parameter }}\r\n {{ . }}!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
);
});
describe('nested with statements', () => {
runner.expectResults(
{
name: 'renders nested with statements correctly',
code: '{{ with $outer }}Outer: {{ with $inner }}Inner: {{ . }}{{ end }}, Outer again: {{ . }}{{ end }}',
args: (args) => args
.withArgument('outer', 'OuterValue')
.withArgument('inner', 'InnerValue'),
expected: [
'Inner: InnerValue',
'Outer: {{ with $inner }}Inner: {{ . }}{{ end }}, Outer again: OuterValue',
],
},
{
name: 'renders nested with statements with context variables',
code: '{{ with $outer }}{{ with $inner }}{{ . }}{{ . }}{{ end }}{{ . }}{{ end }}',
args: (args) => args
.withArgument('outer', 'O')
.withArgument('inner', 'I'),
expected: [
'II',
'{{ with $inner }}{{ . }}{{ . }}{{ end }}O',
],
},
);
});
});
describe('ignores trailing and leading whitespaces and newlines inside scope', () => {
runner.expectResults(
{
name: 'does not render trailing whitespace after value',
code: '{{ with $parameter }}{{ . }}! {{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render trailing newline after value',
code: '{{ with $parameter }}{{ . }}!\r\n{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render leading newline before value',
code: '{{ with $parameter }}\r\n{{ . }}!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
{
name: 'does not render leading whitespace before value',
code: '{{ with $parameter }} {{ . }}!{{ end }}',
args: (args) => args
.withArgument('parameter', 'Hello world'),
expected: ['Hello world!'],
},
);
});
describe('compiles pipes in scope as expected', () => {
describe('pipe behavior', () => {
runner.expectPipeHits({
codeBuilder: (pipeline) => `{{ with $argument }} {{ .${pipeline}}} {{ end }}`,
parameterName: 'argument',