$mdToast: should hide after duration tests false positive

[adamweeks]

In the toast.spec.js file, there is a unit test for 'should hide after duration' that gives a false positive:

 it('should hide after duration', inject(function($timeout, $animate, $rootElement) {
        var parent = angular.element('<div>');
        setup({
          template: '<md-toast />',
          hideTimeout: 1234
        });
        expect($rootElement.find('md-toast').length).toBe(1);
        $timeout.flush();
        expect($rootElement.find('md-toast').length).toBe(0);
      }));

https://github.com/angular/material/blob/master/src/components/toast/toast.spec.js#L151

In the setup command, it passes an option hideTimeout. This option should be hideDelay. The test passes because there is an auto-hide on null hideDelay options.

This test would fail if the $timeout.flush() was changed to $timeout.flush(1234).

[popthestack]

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