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

Gathers all shared test code in single place.

tests/unit/shared/Stubs/ExpressionParserStub.ts

@@ -0,0 +1,18 @@
+import { IExpression } from '@/application/Parser/Script/Compiler/Expressions/Expression/IExpression';
+import { IExpressionParser } from '@/application/Parser/Script/Compiler/Expressions/Parser/IExpressionParser';
+
+export class ExpressionParserStub implements IExpressionParser {
+  public callHistory = new Array<string>();
+
+  private result: IExpression[] = [];
+
+  public withResult(result: IExpression[]) {
+    this.result = result;
+    return this;
+  }
+
+  public findExpressions(code: string): IExpression[] {
+    this.callHistory.push(code);
+    return this.result;
+  }
+}