MatButtonToggle not initialized properly in tests

What is the expected behavior?

MatButtonToggleGroup in a component should be fully initialized when launching Jasmine tests

What is the current behavior?

My component with a MatButtonToggleGroup is not initialized properly in Jasmine tests. Thus, I can not write a test to check that value is initialized properly

What are the steps to reproduce?

Clone this project, and run ng test. The failing test is this one : https://github.com/loriepisicchio/MatButtonToggleInitBug/blob/master/src/app/app.component.spec.ts#L43

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

    "@angular/animations": "^7.2.6",
    "@angular/cdk": "^7.3.3",
    "@angular/common": "~7.2.0",
    "@angular/compiler": "~7.2.0",
    "@angular/core": "~7.2.0",
    "@angular/forms": "~7.2.0",
    "@angular/material": "^7.3.3",
    "@angular/platform-browser": "~7.2.0",
    "@angular/platform-browser-dynamic": "~7.2.0",
    "typescript": "~3.2.2"

Is there anything else we should know?

I have tried to wait for async changes with fixture.whenStable, tried to run again the change detection, nut nothing fixes the issue. When running app with ng serve, the MatButtonToggleGroup is initialized properly

[loriepisicchio]

Nope, no real solution so far. I’ve changed my test to check the value of the property bound to the MatSelect instead of testing the control itself but it’s not ideal…

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