Add more and unify tests for absent object cases

- Unify test data for nonexistence of an object/string and collection.
- Introduce more test through adding missing test data to existing tests.
- Improve logic for checking absence of values to match tests.
- Add missing tests for absent value validation.
- Update documentation to include shared test functionality.

src/application/Parser/Script/Compiler/Expressions/Expression/Expression.ts

@@ -8,23 +8,25 @@ import { ExpressionEvaluationContext, IExpressionEvaluationContext } from './Exp
 
 export type ExpressionEvaluator = (context: IExpressionEvaluationContext) => string;
 export class Expression implements IExpression {
+  public readonly parameters: IReadOnlyFunctionParameterCollection;
+
   constructor(
     public readonly position: ExpressionPosition,
     public readonly evaluator: ExpressionEvaluator,
-    public readonly parameters
-    : IReadOnlyFunctionParameterCollection = new FunctionParameterCollection(),
+    parameters?: IReadOnlyFunctionParameterCollection,
   ) {
     if (!position) {
-      throw new Error('undefined position');
+      throw new Error('missing position');
     }
     if (!evaluator) {
-      throw new Error('undefined evaluator');
+      throw new Error('missing evaluator');
     }
+    this.parameters = parameters ?? new FunctionParameterCollection();
   }
 
   public evaluate(context: IExpressionEvaluationContext): string {
     if (!context) {
-      throw new Error('undefined context');
+      throw new Error('missing context');
     }
     validateThatAllRequiredParametersAreSatisfied(this.parameters, context.args);
     const args = filterUnusedArguments(this.parameters, context.args);

src/application/Parser/Script/Compiler/Expressions/Expression/ExpressionEvaluationContext.ts

@@ -13,7 +13,7 @@ export class ExpressionEvaluationContext implements IExpressionEvaluationContext
     public readonly pipelineCompiler: IPipelineCompiler = new PipelineCompiler(),
   ) {
     if (!args) {
-      throw new Error('undefined args, send empty collection instead');
+      throw new Error('missing args, send empty collection instead.');
     }
   }
 }

src/application/Parser/Script/Compiler/Expressions/ExpressionsCompiler.ts

@@ -15,7 +15,7 @@ export class ExpressionsCompiler implements IExpressionsCompiler {
     args: IReadOnlyFunctionCallArgumentCollection,
   ): string {
     if (!args) {
-      throw new Error('undefined args, send empty collection instead');
+      throw new Error('missing args, send empty collection instead.');
     }
     if (!code) {
       return code;

src/application/Parser/Script/Compiler/Expressions/Parser/CompositeExpressionParser.ts

@@ -10,8 +10,11 @@ const Parsers = [
 
 export class CompositeExpressionParser implements IExpressionParser {
   public constructor(private readonly leafs: readonly IExpressionParser[] = Parsers) {
+    if (!leafs) {
+      throw new Error('missing leafs');
+    }
     if (leafs.some((leaf) => !leaf)) {
-      throw new Error('undefined leaf');
+      throw new Error('missing leaf');
     }
   }
 

src/application/Parser/Script/Compiler/Expressions/Parser/Regex/RegexParser.ts

@@ -16,7 +16,7 @@ export abstract class RegexParser implements IExpressionParser {
 
   private* findRegexExpressions(code: string): Iterable<IExpression> {
     if (!code) {
-      throw new Error('undefined code');
+      throw new Error('missing code');
     }
     const matches = code.matchAll(this.regex);
     for (const match of matches) {

src/application/Parser/Script/Compiler/Expressions/Pipes/PipeDefinitions/EscapeDoubleQuotes.ts

@@ -4,7 +4,10 @@ export class EscapeDoubleQuotes implements IPipe {
   public readonly name: string = 'escapeDoubleQuotes';
 
   public apply(raw: string): string {
-    return raw?.replaceAll('"', '"^""');
+    if (!raw) {
+      return raw;
+    }
+    return raw.replaceAll('"', '"^""');
     /* eslint-disable max-len */
     /*
       "^"" is the most robust and stable choice.

src/application/Parser/Script/Compiler/Expressions/Pipes/PipeFactory.ts

@@ -15,8 +15,11 @@ export class PipeFactory implements IPipeFactory {
   private readonly pipes = new Map<string, IPipe>();
 
   constructor(pipes: readonly IPipe[] = RegisteredPipes) {
+    if (!pipes) {
+      throw new Error('missing pipes');
+    }
     if (pipes.some((pipe) => !pipe)) {
-      throw new Error('undefined pipe in list');
+      throw new Error('missing pipe in list');
     }
     for (const pipe of pipes) {
       this.registerPipe(pipe);

src/application/Parser/Script/Compiler/Expressions/Pipes/PipelineCompiler.ts

@@ -23,8 +23,8 @@ function extractPipeNames(pipeline: string): string[] {
 }
 
 function ensureValidArguments(value: string, pipeline: string) {
-  if (!value) { throw new Error('undefined value'); }
-  if (!pipeline) { throw new Error('undefined pipeline'); }
+  if (!value) { throw new Error('missing value'); }
+  if (!pipeline) { throw new Error('missing pipeline'); }
   if (!pipeline.trimStart().startsWith('|')) {
     throw new Error('pipeline does not start with pipe');
   }