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

MatTooltipHarness.isOpen() returns true if any tooltip is open. Intuitively it should returns if the tooltip associated with that harness is open. The docs also sound like that's what it should do, because it uses the word "the" instead of "a":

Gets whether the tooltip is open.

Reproduction

Steps to reproduce:

1. Have tooltips on 2 elements
2. Open one of them
3. Test .isOpen() on the harness for a different one

Here's a stackblitz: https://stackblitz.com/edit/harness-issue-84mcjr?file=src/app/button-harness-example.spec.ts

Expected Behavior

.isOpen() would return true for the tooltip that is open, and false for the one that is not

Actual Behavior

.isOpen() returns true for both

Environment

@angular-devkit/architect       0.1501.2
@angular-devkit/build-angular   15.1.2
@angular-devkit/core            15.0.5
@angular-devkit/schematics      15.0.5
@angular/cdk                    15.0.3
@angular/cli                    15.0.5
@angular/fire                   7.5.0
@angular/material               15.0.3
@schematics/angular             15.0.5
rxjs                            7.5.7
typescript                      4.8.4