Is this a regression?

No response

The previous version in which this bug was not present was

No response

Description

The filters on MatExpansionPanelHarness seem to be not working correctly.

Reproduction

Run a test with the following content:

const expansionPanels = await loader.getHarness(MatExpansionPanelHarness.with({ disabled: true }));

Expected Behavior

I get a list of MatExpansionPanelHarness that are disabled

Actual Behavior

I get the error:

SyntaxError: '' is not a valid selector
at emit (/node_modules/nwsapi/src/nwsapi.js:575:17)
at Object._querySelectorAll [as select] (/node_modules/nwsapi/src/nwsapi.js:1491:9)
at HTMLDivElementImpl.querySelectorAll (node_modules/jsdom/lib/jsdom/living/nodes/ParentNode-impl.js:78:26)
at HTMLDivElement.querySelectorAll (node_modules/jsdom/lib/jsdom/living/generated/Element.js:1119:58)
at Object.queryFn (node_modules/@angular/cdk/fesm2022/testing/testbed.mjs:622:39)
at TestbedHarnessEnvironment.getAllRawElements (node_modules/@angular/cdk/fesm2022/testing/testbed.mjs:770:41)

Environment

• Angular: 18.1.1
• CDK/Material: 18.1.1
• Browser(s): -
• Operating System (e.g. Windows, macOS, Ubuntu): Ubuntu