chore: add generic overloaded toStrictEqual

Refs: #32986

packages/playwright/types/test.d.ts

@@ -31,8 +31,8 @@ export type ReporterDescription = Readonly<
   [string] | [string, any]
 >;
 
-type PartialDeep<T> = {
-  [P in keyof T]?: PartialDeep<T[P]>
+type DeepPartial<T> = {
+  [P in keyof T]?: DeepPartial<T[P]>
 }
 
 type UseOptions<TestArgs, WorkerArgs> = Partial<WorkerArgs> & Partial<TestArgs>;
@@ -6479,6 +6479,28 @@ interface GenericAssertions<R> {
    * @param expected The expected object value to match against.
    */
   toMatchObject(expected: Record<string, unknown> | Array<unknown>): R;
+  /**
+   * Compares contents of the value with contents of
+   * [`expected`](https://playwright.dev/docs/api/class-genericassertions#generic-assertions-to-strict-equal-option-expected)
+   * **and** their types.
+   *
+   * Differences from
+   * [expect(value).toEqual(expected)](https://playwright.dev/docs/api/class-genericassertions#generic-assertions-to-equal):
+   * - Keys with undefined properties are checked. For example, `{ a: undefined, b: 2 }` does not match `{ b: 2 }`.
+   * - Array sparseness is checked. For example, `[, 1]` does not match `[undefined, 1]`.
+   * - Object types are checked to be equal. For example, a class instance with fields `a` and `b` will not equal a
+   *   literal object with fields `a` and `b`.
+   *
+   * **Usage**
+   *
+   * ```js
+   * const value = { prop: 1 };
+   * expect(value).toStrictEqual({ prop: 1 });
+   * ```
+   *
+   * @param expected Expected value.
+   */
+  toStrictEqual<K>(expected: K): R;
   /**
    * Compares contents of the value with contents of
    * [`expected`](https://playwright.dev/docs/api/class-genericassertions#generic-assertions-to-strict-equal-option-expected)

tests/playwright-test/types.spec.ts

@@ -360,3 +360,41 @@ test.fixme('should check types of overloaded toMatchObject with generic paramete
   });
   expect(result.exitCode).toBe(0);
 });
+
+test.fixme('should check types of overloaded toStrictEqual with generic parameter', async ({ runTSC }) => {
+  const result = await runTSC({
+    'playwright.config.ts': `
+      import { defineConfig } from '@playwright/test';
+
+      export default defineConfig({
+      });
+    `,
+    'a.spec.ts': `
+      import { test, expect } from '@playwright/test';
+      test('my test', async () => {
+        const value = { a: 1, b: 'foo', c: { d: 2, e: 'bar' } };
+
+        expect.soft(value).toStrictEqual<typeof value>({ a: 1, b: 'foo', c: { d: 2, e: 'bar' } });
+        expect.soft([value]).toStrictEqual<Array<typeof value>>([{ a: 1, b: 'foo', c: { d: 2, e: 'bar' } }]);
+
+        expect.soft(new Date()).toStrictEqual<Date>(new Date());
+
+        // @ts-expect-error
+        expect.soft(value).toStrictEqual<typeof value>({ a: 1 });
+
+        // @ts-expect-error
+        expect.soft(value).toStrictEqual<typeof value>({ a: 'a' });
+
+        // @ts-expect-error
+        expect.soft(value).toStrictEqual<typeof value>({ c: { e: 2 } });
+        
+        // @ts-expect-error
+        expect.soft([value]).toStrictEqual<typeof value>([{ a: 'a' }]);
+
+        // @ts-expect-error
+        expect.soft([value]).toStrictEqual<typeof value>([{ c: { e: 2 } }]);
+      });
+    `
+  });
+  expect(result.exitCode).toBe(0);
+});

utils/generate_types/overrides-test.d.ts

@@ -295,6 +295,7 @@ interface GenericAssertions<R> {
   toMatch(expected: RegExp | string): R;
   toMatchObject<K extends Record<string, unknown>>(expected: DeepPartial<K> | Array<DeepPartial<K>>): R;
   toMatchObject(expected: Record<string, unknown> | Array<unknown>): R;
+  toStrictEqual<K>(expected: K): R;
   toStrictEqual(expected: unknown): R;
   toThrow(error?: unknown): R;
   toThrowError(error?: unknown): R;