[BUG] @playwright/test type errors using latest TypeScript nightly

[mjbvz]

Context:

• Playwright Version: @playwright/test 1.20.1
• Operating System: MacOS
• Node.js version: 16
• Browser: NA
• Extra: NA

Repo

1. Install latest TS nightly build (tested with 4.7.0-dev.20220329)
2. Install @playwright/test 1.20.1
3. In a TS file with strict null checks enabled, write:

import * as playwright from '@playwright/test';

4. Try compiling

Describe the bug

This produces the following compile errors:

matb@mjbmbp16 san % npx tsc -p tsconfig.json
node_modules/@playwright/test/types/test.d.ts:2682:57 - error TS2344: Type 'T' does not satisfy the constraint 'KeyValue'.

2682   extend<T, W extends KeyValue = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
                                                             ~

  node_modules/@playwright/test/types/test.d.ts:2682:10
    2682   extend<T, W extends KeyValue = {}>(fixtures: Fixtures<T, W, TestArgs, WorkerArgs>): TestType<TestArgs & T, WorkerArgs & W>;
                  ~
    This type parameter probably needs an `extends object` constraint.

node_modules/@playwright/test/types/test.d.ts:2693:72 - error TS2344: Type 'Args' does not satisfy the constraint 'KeyValue'.

2693 type TestFixtureValue<R, Args> = Exclude<R, Function> | TestFixture<R, Args>;
                                                                            ~~~~

  node_modules/@playwright/test/types/test.d.ts:2693:26
    2693 type TestFixtureValue<R, Args> = Exclude<R, Function> | TestFixture<R, Args>;
                                  ~~~~
    This type parameter probably needs an `extends object` constraint.

node_modules/@playwright/test/types/test.d.ts:2694:76 - error TS2344: Type 'Args' does not satisfy the constraint 'KeyValue'.

2694 type WorkerFixtureValue<R, Args> = Exclude<R, Function> | WorkerFixture<R, Args>;
                                                                                ~~~~

  node_modules/@playwright/test/types/test.d.ts:2694:28
    2694 type WorkerFixtureValue<R, Args> = Exclude<R, Function> | WorkerFixture<R, Args>;
                                    ~~~~
    This type parameter probably needs an `extends object` constraint.


Found 3 errors in the same file, starting at: node_modules/@playwright/test/types/test.d.ts:2682

This may be another case of microsoft/TypeScript#48468

[rwoll]

Thanks for the report. I repro'd with typescript@4.7.0-dev.20220329.