Add tests generated by LLM to improve coverage (#1195)

Author: dbaeumer

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f1.ts

@@ -0,0 +1,32 @@
+export interface Result {
+	value: number;
+	message: string;
+}
+
+export class Calculator {
+	private result: number;
+
+	constructor(initial: number = 0) {
+		this.result = initial;
+	}
+
+	public add(x: number): Calculator {
+		this.result += x;
+		return this;
+	}
+
+	public getResult(): Result {
+		return {
+			value: this.result,
+			message: `Result is ${this.result}`
+		};
+	}
+}
+
+export function createCalculator(initial?: number): Calculator {
+	return new Calculator(initial);
+}
+
+export function getValue(): number {
+	return 42;
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f2.ts

@@ -0,0 +1,5 @@
+import { createCalculator } from './f1';
+
+function test(): void {
+	createCalculator().
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f3.ts

@@ -0,0 +1,6 @@
+import { Calculator } from './f1';
+
+function test(): void {
+	const calc = new Calculator(10);
+	calc.add(5).getResult();
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f4.ts

@@ -0,0 +1,6 @@
+import { Calculator } from './f1';
+
+function test(): void {
+	const calc = new Calculator();
+	calc.getResult().message;
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f5.ts

@@ -0,0 +1,6 @@
+import { Calculator } from './f1';
+
+function test(): void {
+	const calcs = [new Calculator(), new Calculator()];
+	calcs[0].getResult();
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/source/f6.ts

@@ -0,0 +1,9 @@
+import { Calculator } from './f1';
+
+interface DeepNest {
+	a: { b: { c: { d: { e: { f: Calculator } } } } };
+}
+
+function test(obj: DeepNest): void {
+	obj.a.b.c.d.e.f.getResult();
+}

src/extension/typescriptContext/serverPlugin/fixtures/p14/tsconfig.json

@@ -0,0 +1,6 @@
+{
+	"compilerOptions": {
+		"rootDir": "./source"
+	}
+}
+

src/extension/typescriptContext/serverPlugin/src/node/test/simple.spec.ts

@@ -345,6 +345,58 @@ suite('PropertyTypes', () => {
 	});
 });
 
+suite('TypeOfExpressionRunnable', () => {
+	let session: testing.TestSession;
+	beforeAll(() => {
+		session = create(path.join(root, 'p14'));
+	});
+
+	test('ignores property access without identifier', () => {
+		const context = computeContext(session, path.join(root, 'p14/source/f2.ts'), { line: 3, character: 19 }, ContextKind.Snippet);
+		assertContextItems(context, []);
+	});
+
+	test('type from method chain', () => {
+		const expected: testing.ExpectedCodeSnippet[] = [{
+			kind: ContextKind.Snippet,
+			value: 'declare class Calculator { constructor(initial: number = 0); public add(x: number): Calculator; public getResult(): Result; }',
+			fileName: /p14\/source\/f1.ts$/
+		}];
+		const context = computeContext(session, path.join(root, 'p14/source/f3.ts'), { line: 4, character: 22 }, ContextKind.Snippet);
+		assertContextItems(context, expected, 'contains');
+	});
+
+	test('type from method return (interface)', () => {
+		const expected: testing.ExpectedCodeSnippet[] = [{
+			kind: ContextKind.Snippet,
+			value: 'interface Result { value: number; message: string; }',
+			fileName: /p14\/source\/f1.ts$/
+		}];
+		const context = computeContext(session, path.join(root, 'p14/source/f4.ts'), { line: 4, character: 25 }, ContextKind.Snippet);
+		assertContextItems(context, expected, 'contains');
+	});
+
+	test('type from element access chain', () => {
+		const expected: testing.ExpectedCodeSnippet[] = [{
+			kind: ContextKind.Snippet,
+			value: 'declare class Calculator { constructor(initial: number = 0); public add(x: number): Calculator; public getResult(): Result; }',
+			fileName: /p14\/source\/f1.ts$/
+		}];
+		const context = computeContext(session, path.join(root, 'p14/source/f5.ts'), { line: 4, character: 19 }, ContextKind.Snippet);
+		assertContextItems(context, expected, 'contains');
+	});
+
+	test('type from deeply nested property access', () => {
+		const expected: testing.ExpectedCodeSnippet[] = [{
+			kind: ContextKind.Snippet,
+			value: 'declare class Calculator { constructor(initial: number = 0); public add(x: number): Calculator; public getResult(): Result; }',
+			fileName: /p14\/source\/f1.ts$/
+		}];
+		const context = computeContext(session, path.join(root, 'p14/source/f6.ts'), { line: 7, character: 25 }, ContextKind.Snippet);
+		assertContextItems(context, expected, 'contains');
+	});
+});
+
 suite('Traits', () => {
 	test('complete traits', () => {
 		const session: testing.TestSession = create(path.join(root, 'p1'));