Assertion.contains() requires same type as actual parameter in expect()

[timnederhoff]

What is your Test Scenario?

To have this test code to compile:

test('string array contains string', async t => {
  await t.expect(['one', 'two', 'three']).contains('one');
});

test('number array contains number', async t => {
  await t.expect([1, 2, 3]).contains(3);
});

test('object contains object', async t => {
  await t.expect({ key1: 'val1', key2: 'val2' }).contains({ key1: 'val1' } as any);
});

What is the Current behavior?

Error: TypeScript compilation failed.
/my/test.ts (6, 52): Argument of type '"one"' is not assignable to parameter of type 'string[]'.
/my/test.ts (10, 38): Argument of type '3' is not assignable to parameter of type 'number[]'.
/my/test.ts (14, 59): Argument of type '{ key1: string; }' is not assignable to parameter of type '{ key1: string; key2: string; }'.
  Property 'key2' is missing in type '{ key1: string; }' but required in type '{ key1: string; key2: string; }'.

What is the Expected behavior?

Testcafe compiles the typescript and runs the tests and passes them.

Note: Using Javascript, the test runs successfully. defining expected values types as any will pass the compilation of the typescript:

test('string array contains string', async t => {
  await t.expect(['one', 'two', 'three']).contains('one' as any);
});

test('number array contains number', async t => {
  await t.expect([1, 2, 3]).contains(3 as any);
});

test('object contains object', async t => {
  await t.expect({ key1: 'val1', key2: 'val2' }).contains({ key1: 'val1' } as any);
});

Your Environment details:

• testcafe version: 1.1.0
• node.js version: v10.15.1
• command-line arguments: testcafe chrome /my/test.ts
• platform and version: Linux Ubuntu 16.04

[AndreyBelym]

Thank you for reporting this problem. We will fix it in the current development sprint.

[timnederhoff]

awesome, thanks!

[lock]

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