Move stubs from ./stubs to ./shared/Stubs

Gathers all shared test code in single place.

tests/unit/shared/Stubs/ExpressionStub.ts

@@ -0,0 +1,43 @@
+import { ExpressionPosition } from '@/application/Parser/Script/Compiler/Expressions/Expression/ExpressionPosition';
+import { IExpression } from '@/application/Parser/Script/Compiler/Expressions/Expression/IExpression';
+import { IReadOnlyFunctionParameterCollection } from '@/application/Parser/Script/Compiler/Function/Parameter/IFunctionParameterCollection';
+import { IExpressionEvaluationContext } from '@/application/Parser/Script/Compiler/Expressions/Expression/ExpressionEvaluationContext';
+import { FunctionParameterCollectionStub } from './FunctionParameterCollectionStub';
+
+export class ExpressionStub implements IExpression {
+  public callHistory = new Array<IExpressionEvaluationContext>();
+
+  public position = new ExpressionPosition(0, 5);
+
+  public parameters: IReadOnlyFunctionParameterCollection = new FunctionParameterCollectionStub();
+
+  private result: string;
+
+  public withParameters(parameters: IReadOnlyFunctionParameterCollection) {
+    this.parameters = parameters;
+    return this;
+  }
+
+  public withParameterNames(parameterNames: readonly string[], isOptional = false) {
+    const collection = new FunctionParameterCollectionStub()
+      .withParameterNames(parameterNames, isOptional);
+    return this.withParameters(collection);
+  }
+
+  public withPosition(start: number, end: number) {
+    this.position = new ExpressionPosition(start, end);
+    return this;
+  }
+
+  public withEvaluatedResult(result: string) {
+    this.result = result;
+    return this;
+  }
+
+  public evaluate(context: IExpressionEvaluationContext): string {
+    const { args } = context;
+    this.callHistory.push(context);
+    const result = this.result || `[expression-stub] args: ${args ? Object.keys(args).map((key) => `${key}: ${args[key]}`).join('", "') : 'none'}`;
+    return result;
+  }
+}