bug(COMPONENT): MatAutocompleteHarness - Unable to retrieve options for autocomplete. Autocomplete panel is closed.

[incy-tron]

Is this a regression?

• Yes, this behavior used to work in the previous version

The previous version in which this bug was not present was

No response

Description

I am testing a large application using the Angular Test Suite with karma - jasmine. I have 164 test cases and when I run all of the test cases, one of the test cases that always fails is one where I'm using MatAutocompleteHarness. However, if I rerun that test individually it always passes.

The failure message I'm getting is: Error: Unable to retrieve options for autocomplete. Autocomplete panel is closed.

Reproduction

Cannot provide a StackBlitz, since as I mention above, it only happens when running all of the test cases for a large application. The specific test case that fails is:

component.showModifications = true;
fixture.detectChanges();
await fixture.whenStable();

const loader = TestbedHarnessEnvironment.loader(fixture);
const autocompletes = await loader.getAllHarnesses(MatAutocompleteHarness);
expect(autocompletes.length).toBe(1);

Expected Behavior

Expect the test to pass when running with many other tests.

Actual Behavior

Fails every time when running multiple tests

Environment

• Angular: 17.3
• CDK/Material: "@angular/cdk": "^17.3.0", "@angular/material": "^17.3.0"
• Browser(s): Chrome
• Operating System : Windows and MacOS

[incy-tron]

replaced call to MatAutocompleteHarness focus() method with enterText('string') method fixed the problem.

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