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select.spec.ts
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select.spec.ts
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import {Directionality} from '@angular/cdk/bidi';
import {
DOWN_ARROW,
END,
ENTER,
HOME,
LEFT_ARROW,
RIGHT_ARROW,
SPACE,
TAB,
UP_ARROW,
A,
ESCAPE,
PAGE_DOWN,
PAGE_UP,
} from '@angular/cdk/keycodes';
import {OverlayContainer} from '@angular/cdk/overlay';
import {ScrollDispatcher} from '@angular/cdk/scrolling';
import {
createKeyboardEvent,
dispatchEvent,
dispatchFakeEvent,
dispatchKeyboardEvent,
wrappedErrorMessage,
} from '@angular/cdk/testing/private';
import {
ChangeDetectionStrategy,
Component,
DebugElement,
OnInit,
QueryList,
ViewChild,
ViewChildren,
Provider,
} from '@angular/core';
import {
waitForAsync,
ComponentFixture,
fakeAsync,
flush,
inject,
TestBed,
tick,
} from '@angular/core/testing';
import {
ControlValueAccessor,
FormBuilder,
FormControl,
FormGroup,
FormGroupDirective,
FormsModule,
NG_VALUE_ACCESSOR,
ReactiveFormsModule,
Validators,
} from '@angular/forms';
import {MatOption, MatOptionSelectionChange, ErrorStateMatcher} from '@angular/material/core';
import {MAT_SELECT_CONFIG, MatSelectConfig} from '@angular/material/select';
import {
FloatLabelType,
MatFormFieldModule,
MAT_FORM_FIELD_DEFAULT_OPTIONS,
} from '@angular/material/form-field';
import {By} from '@angular/platform-browser';
import {NoopAnimationsModule} from '@angular/platform-browser/animations';
import {LiveAnnouncer} from '@angular/cdk/a11y';
import {Subject, Subscription, EMPTY, Observable} from 'rxjs';
import {map} from 'rxjs/operators';
import {MatSelectModule} from './index';
import {MatSelect} from './select';
import {
getMatSelectDynamicMultipleError,
getMatSelectNonArrayValueError,
getMatSelectNonFunctionValueError,
} from './select-errors';
/** Default debounce interval when typing letters to select an option. */
const DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL = 200;
describe('MDC-based MatSelect', () => {
let overlayContainerElement: HTMLElement;
let dir: {value: 'ltr' | 'rtl'; change: Observable<string>};
let scrolledSubject = new Subject();
/**
* Configures the test module for MatSelect with the given declarations. This is broken out so
* that we're only compiling the necessary test components for each test in order to speed up
* overall test time.
* @param declarations Components to declare for this block
* @param providers Additional providers for this block
*/
function configureMatSelectTestingModule(declarations: any[], providers: Provider[] = []) {
TestBed.configureTestingModule({
imports: [
MatFormFieldModule,
MatSelectModule,
ReactiveFormsModule,
FormsModule,
NoopAnimationsModule,
],
declarations: declarations,
providers: [
{provide: Directionality, useFactory: () => (dir = {value: 'ltr', change: EMPTY})},
{
provide: ScrollDispatcher,
useFactory: () => ({
scrolled: () => scrolledSubject,
}),
},
...providers,
],
}).compileComponents();
inject([OverlayContainer], (oc: OverlayContainer) => {
overlayContainerElement = oc.getContainerElement();
})();
}
describe('core', () => {
beforeEach(waitForAsync(() => {
configureMatSelectTestingModule([
BasicSelect,
MultiSelect,
SelectWithGroups,
SelectWithGroupsAndNgContainer,
SelectWithFormFieldLabel,
SelectWithChangeEvent,
SelectInsideDynamicFormGroup,
]);
}));
describe('accessibility', () => {
describe('for select', () => {
let fixture: ComponentFixture<BasicSelect>;
let select: HTMLElement;
beforeEach(fakeAsync(() => {
fixture = TestBed.createComponent(BasicSelect);
fixture.detectChanges();
select = fixture.debugElement.query(By.css('mat-select'))!.nativeElement;
}));
it('should set the role of the select to combobox', fakeAsync(() => {
expect(select.getAttribute('role')).toEqual('combobox');
expect(select.getAttribute('aria-autocomplete')).toBe('none');
expect(select.getAttribute('aria-haspopup')).toBe('listbox');
}));
it('should point the aria-controls attribute to the listbox', fakeAsync(() => {
expect(select.hasAttribute('aria-controls')).toBe(false);
fixture.componentInstance.select.open();
fixture.detectChanges();
flush();
const ariaControls = select.getAttribute('aria-controls');
expect(ariaControls).toBeTruthy();
expect(ariaControls).toBe(document.querySelector('.mat-mdc-select-panel')!.id);
}));
it('should point the aria-owns attribute to the listbox on the trigger', fakeAsync(() => {
const trigger = select.querySelector('.mat-mdc-select-trigger')!;
expect(trigger.hasAttribute('aria-owns')).toBe(false);
fixture.componentInstance.select.open();
fixture.detectChanges();
flush();
const ariaOwns = trigger.getAttribute('aria-owns');
expect(ariaOwns).toBeTruthy();
expect(ariaOwns).toBe(document.querySelector('.mat-mdc-select-panel')!.id);
}));
it('should set aria-expanded based on the select open state', fakeAsync(() => {
expect(select.getAttribute('aria-expanded')).toBe('false');
fixture.componentInstance.select.open();
fixture.detectChanges();
flush();
expect(select.getAttribute('aria-expanded')).toBe('true');
}));
it('should support setting a custom aria-label', fakeAsync(() => {
fixture.componentInstance.ariaLabel = 'Custom Label';
fixture.detectChanges();
expect(select.getAttribute('aria-label')).toEqual('Custom Label');
expect(select.hasAttribute('aria-labelledby')).toBeFalsy();
}));
it('should be able to add an extra aria-labelledby on top of the default', fakeAsync(() => {
fixture.componentInstance.ariaLabelledby = 'myLabelId';
fixture.detectChanges();
const labelId = fixture.nativeElement.querySelector('label').id;
const valueId = fixture.nativeElement.querySelector('.mat-mdc-select-value').id;
expect(select.getAttribute('aria-labelledby')).toBe(`${labelId} ${valueId} myLabelId`);
}));
it('should set aria-labelledby to the value and label IDs', fakeAsync(() => {
fixture.detectChanges();
const labelId = fixture.nativeElement.querySelector('label').id;
const valueId = fixture.nativeElement.querySelector('.mat-mdc-select-value').id;
expect(select.getAttribute('aria-labelledby')).toBe(`${labelId} ${valueId}`);
}));
it('should trim the trigger aria-labelledby when there is no label', fakeAsync(() => {
fixture.componentInstance.hasLabel = false;
fixture.detectChanges();
flush();
fixture.detectChanges();
// Note that we assert that there are no spaces around the value.
const valueId = fixture.nativeElement.querySelector('.mat-mdc-select-value').id;
expect(select.getAttribute('aria-labelledby')).toBe(`${valueId}`);
}));
it('should set the tabindex of the select to 0 by default', fakeAsync(() => {
expect(select.getAttribute('tabindex')).toEqual('0');
}));
it('should set `aria-describedby` to the id of the mat-hint', fakeAsync(() => {
expect(select.getAttribute('aria-describedby')).toBeNull();
fixture.componentInstance.hint = 'test';
fixture.detectChanges();
const hint = fixture.debugElement.query(By.css('mat-hint')).nativeElement;
expect(select.getAttribute('aria-describedby')).toBe(hint.getAttribute('id'));
expect(select.getAttribute('aria-describedby')).toMatch(/^mat-mdc-hint-\d+$/);
}));
it('should support user binding to `aria-describedby`', fakeAsync(() => {
fixture.componentInstance.ariaDescribedBy = 'test';
fixture.detectChanges();
expect(select.getAttribute('aria-describedby')).toBe('test');
}));
it('should be able to override the tabindex', fakeAsync(() => {
fixture.componentInstance.tabIndexOverride = 3;
fixture.detectChanges();
expect(select.getAttribute('tabindex')).toBe('3');
}));
it('should set aria-required for required selects', fakeAsync(() => {
expect(select.getAttribute('aria-required'))
.withContext(`Expected aria-required attr to be false for normal selects.`)
.toEqual('false');
fixture.componentInstance.isRequired = true;
fixture.detectChanges();
expect(select.getAttribute('aria-required'))
.withContext(`Expected aria-required attr to be true for required selects.`)
.toEqual('true');
}));
it('should set the mat-select-required class for required selects', fakeAsync(() => {
expect(select.classList).not.toContain(
'mat-mdc-select-required',
`Expected the mat-mdc-select-required class not to be set.`,
);
fixture.componentInstance.isRequired = true;
fixture.detectChanges();
expect(select.classList)
.withContext(`Expected the mat-mdc-select-required class to be set.`)
.toContain('mat-mdc-select-required');
}));
it('should set aria-invalid for selects that are invalid and touched', fakeAsync(() => {
expect(select.getAttribute('aria-invalid'))
.withContext(`Expected aria-invalid attr to be false for valid selects.`)
.toEqual('false');
fixture.componentInstance.isRequired = true;
fixture.componentInstance.control.markAsTouched();
fixture.detectChanges();
expect(select.getAttribute('aria-invalid'))
.withContext(`Expected aria-invalid attr to be true for invalid selects.`)
.toEqual('true');
}));
it('should set aria-disabled for disabled selects', fakeAsync(() => {
expect(select.getAttribute('aria-disabled')).toEqual('false');
fixture.componentInstance.control.disable();
fixture.detectChanges();
expect(select.getAttribute('aria-disabled')).toEqual('true');
}));
it('should set the tabindex of the select to -1 if disabled', fakeAsync(() => {
fixture.componentInstance.control.disable();
fixture.detectChanges();
expect(select.getAttribute('tabindex')).toEqual('-1');
fixture.componentInstance.control.enable();
fixture.detectChanges();
expect(select.getAttribute('tabindex')).toEqual('0');
}));
it('should set `aria-labelledby` to the value ID if there is no form field', () => {
fixture.destroy();
const labelFixture = TestBed.createComponent(SelectWithChangeEvent);
labelFixture.detectChanges();
select = labelFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
const valueId = labelFixture.nativeElement.querySelector('.mat-mdc-select-value').id;
expect(select.getAttribute('aria-labelledby')?.trim()).toBe(valueId);
});
it('should select options via the UP/DOWN arrow keys on a closed select', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(options[0].selected)
.withContext('Expected first option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model.')
.toBe(options[0].value);
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
// Note that the third option is skipped, because it is disabled.
// Note that the third option is skipped, because it is disabled.
expect(options[3].selected)
.withContext('Expected fourth option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from fourth option to have been set on the model.')
.toBe(options[3].value);
dispatchKeyboardEvent(select, 'keydown', UP_ARROW);
expect(options[1].selected)
.withContext('Expected second option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from second option to have been set on the model.')
.toBe(options[1].value);
flush();
}));
it(
'should go back to first option if value is reset after interacting using the' +
'arrow keys on a closed select',
fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
flush();
expect(options[0].selected)
.withContext('Expected first option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model.')
.toBe(options[0].value);
formControl.reset();
fixture.detectChanges();
expect(options[0].selected)
.withContext('Expected first option to be deselected.')
.toBe(false);
expect(formControl.value).withContext('Expected value to be reset.').toBeFalsy();
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
flush();
expect(options[0].selected)
.withContext('Expected first option to be selected again.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model again.')
.toBe(options[0].value);
}),
);
it('should select first/last options via the HOME/END keys on a closed select', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const firstOption = fixture.componentInstance.options.first;
const lastOption = fixture.componentInstance.options.last;
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
const endEvent = dispatchKeyboardEvent(select, 'keydown', END);
expect(endEvent.defaultPrevented).toBe(true);
expect(lastOption.selected)
.withContext('Expected last option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from last option to have been set on the model.')
.toBe(lastOption.value);
const homeEvent = dispatchKeyboardEvent(select, 'keydown', HOME);
expect(homeEvent.defaultPrevented).toBe(true);
expect(firstOption.selected)
.withContext('Expected first option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model.')
.toBe(firstOption.value);
flush();
}));
it('should select first/last options via the PAGE_DOWN/PAGE_UP keys on a closed select with less than 10 options', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const firstOption = fixture.componentInstance.options.first;
const lastOption = fixture.componentInstance.options.last;
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
expect(fixture.componentInstance.select._keyManager.activeItemIndex).toBe(-1);
const endEvent = dispatchKeyboardEvent(select, 'keydown', PAGE_DOWN);
expect(fixture.componentInstance.select._keyManager.activeItemIndex).toBe(7);
expect(endEvent.defaultPrevented).toBe(true);
expect(lastOption.selected)
.withContext('Expected last option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from last option to have been set on the model.')
.toBe(lastOption.value);
const homeEvent = dispatchKeyboardEvent(select, 'keydown', PAGE_UP);
expect(fixture.componentInstance.select._keyManager.activeItemIndex).toBe(0);
expect(homeEvent.defaultPrevented).toBe(true);
expect(firstOption.selected)
.withContext('Expected first option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model.')
.toBe(firstOption.value);
flush();
}));
it('should resume focus from selected item after selecting via click', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
fixture.componentInstance.select.open();
fixture.detectChanges();
flush();
(overlayContainerElement.querySelectorAll('mat-option')[3] as HTMLElement).click();
fixture.detectChanges();
flush();
expect(formControl.value).toBe(options[3].value);
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
fixture.detectChanges();
expect(formControl.value).toBe(options[4].value);
flush();
}));
it('should select options via LEFT/RIGHT arrow keys on a closed select', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
dispatchKeyboardEvent(select, 'keydown', RIGHT_ARROW);
expect(options[0].selected)
.withContext('Expected first option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from first option to have been set on the model.')
.toBe(options[0].value);
dispatchKeyboardEvent(select, 'keydown', RIGHT_ARROW);
dispatchKeyboardEvent(select, 'keydown', RIGHT_ARROW);
// Note that the third option is skipped, because it is disabled.
// Note that the third option is skipped, because it is disabled.
expect(options[3].selected)
.withContext('Expected fourth option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from fourth option to have been set on the model.')
.toBe(options[3].value);
dispatchKeyboardEvent(select, 'keydown', LEFT_ARROW);
expect(options[1].selected)
.withContext('Expected second option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from second option to have been set on the model.')
.toBe(options[1].value);
flush();
}));
it('should announce changes via the keyboard on a closed select', fakeAsync(
inject([LiveAnnouncer], (liveAnnouncer: LiveAnnouncer) => {
spyOn(liveAnnouncer, 'announce');
dispatchKeyboardEvent(select, 'keydown', RIGHT_ARROW);
expect(liveAnnouncer.announce).toHaveBeenCalledWith('Steak', jasmine.any(Number));
flush();
}),
));
it('should not throw when reaching a reset option using the arrow keys on a closed select', fakeAsync(() => {
fixture.componentInstance.foods = [
{value: 'steak-0', viewValue: 'Steak'},
{value: null, viewValue: 'None'},
];
fixture.detectChanges();
fixture.componentInstance.control.setValue('steak-0');
expect(() => {
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
fixture.detectChanges();
}).not.toThrow();
flush();
}));
it('should open a single-selection select using ALT + DOWN_ARROW', fakeAsync(() => {
const {control: formControl, select: selectInstance} = fixture.componentInstance;
expect(selectInstance.panelOpen).withContext('Expected select to be closed.').toBe(false);
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
const event = createKeyboardEvent('keydown', DOWN_ARROW, undefined, {alt: true});
dispatchEvent(select, event);
expect(selectInstance.panelOpen).withContext('Expected select to be open.').toBe(true);
expect(formControl.value).withContext('Expected value not to have changed.').toBeFalsy();
}));
it('should open a single-selection select using ALT + UP_ARROW', fakeAsync(() => {
const {control: formControl, select: selectInstance} = fixture.componentInstance;
expect(selectInstance.panelOpen).withContext('Expected select to be closed.').toBe(false);
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
const event = createKeyboardEvent('keydown', UP_ARROW, undefined, {alt: true});
dispatchEvent(select, event);
expect(selectInstance.panelOpen).withContext('Expected select to be open.').toBe(true);
expect(formControl.value).withContext('Expected value not to have changed.').toBeFalsy();
}));
it('should close when pressing ALT + DOWN_ARROW', fakeAsync(() => {
const {select: selectInstance} = fixture.componentInstance;
selectInstance.open();
fixture.detectChanges();
expect(selectInstance.panelOpen).withContext('Expected select to be open.').toBe(true);
const event = createKeyboardEvent('keydown', DOWN_ARROW, undefined, {alt: true});
dispatchEvent(select, event);
expect(selectInstance.panelOpen).withContext('Expected select to be closed.').toBe(false);
expect(event.defaultPrevented)
.withContext('Expected default action to be prevented.')
.toBe(true);
}));
it('should close when pressing ALT + UP_ARROW', fakeAsync(() => {
const {select: selectInstance} = fixture.componentInstance;
selectInstance.open();
fixture.detectChanges();
expect(selectInstance.panelOpen).withContext('Expected select to be open.').toBe(true);
const event = createKeyboardEvent('keydown', UP_ARROW, undefined, {alt: true});
dispatchEvent(select, event);
expect(selectInstance.panelOpen).withContext('Expected select to be closed.').toBe(false);
expect(event.defaultPrevented)
.withContext('Expected default action to be prevented.')
.toBe(true);
}));
it('should be able to select options by typing on a closed select', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
dispatchEvent(select, createKeyboardEvent('keydown', 80, 'p'));
tick(DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL);
expect(options[1].selected)
.withContext('Expected second option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from second option to have been set on the model.')
.toBe(options[1].value);
dispatchEvent(select, createKeyboardEvent('keydown', 69, 'e'));
tick(DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL);
expect(options[5].selected)
.withContext('Expected sixth option to be selected.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from sixth option to have been set on the model.')
.toBe(options[5].value);
}));
it('should not open the select when pressing space while typing', fakeAsync(() => {
const selectInstance = fixture.componentInstance.select;
fixture.componentInstance.typeaheadDebounceInterval = DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL;
fixture.detectChanges();
expect(selectInstance.panelOpen)
.withContext('Expected select to be closed on init.')
.toBe(false);
dispatchEvent(select, createKeyboardEvent('keydown', 80, 'p'));
tick(DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL / 2);
fixture.detectChanges();
dispatchKeyboardEvent(select, 'keydown', SPACE);
fixture.detectChanges();
expect(selectInstance.panelOpen)
.withContext('Expected select to remain closed after space was pressed.')
.toBe(false);
tick(DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL / 2);
fixture.detectChanges();
expect(selectInstance.panelOpen)
.withContext('Expected select to be closed when the timer runs out.')
.toBe(false);
}));
it('should be able to customize the typeahead debounce interval', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
const options = fixture.componentInstance.options.toArray();
fixture.componentInstance.typeaheadDebounceInterval = 1337;
fixture.detectChanges();
expect(formControl.value).withContext('Expected no initial value.').toBeFalsy();
dispatchEvent(select, createKeyboardEvent('keydown', 80, 'p'));
tick(DEFAULT_TYPEAHEAD_DEBOUNCE_INTERVAL);
expect(formControl.value)
.withContext('Expected no value after a bit of time has passed.')
.toBeFalsy();
tick(1337);
expect(options[1].selected)
.withContext('Expected second option to be selected after all the time has passed.')
.toBe(true);
expect(formControl.value)
.withContext('Expected value from second option to have been set on the model.')
.toBe(options[1].value);
}));
it('should open the panel when pressing a vertical arrow key on a closed multiple select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
const instance = multiFixture.componentInstance;
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
const initialValue = instance.control.value;
expect(instance.select.panelOpen).withContext('Expected panel to be closed.').toBe(false);
const event = dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(instance.select.panelOpen).withContext('Expected panel to be open.').toBe(true);
expect(instance.control.value)
.withContext('Expected value to stay the same.')
.toBe(initialValue);
expect(event.defaultPrevented)
.withContext('Expected default to be prevented.')
.toBe(true);
}));
it('should open the panel when pressing a horizontal arrow key on closed multiple select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
const instance = multiFixture.componentInstance;
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
const initialValue = instance.control.value;
expect(instance.select.panelOpen).withContext('Expected panel to be closed.').toBe(false);
const event = dispatchKeyboardEvent(select, 'keydown', RIGHT_ARROW);
expect(instance.select.panelOpen).withContext('Expected panel to be open.').toBe(true);
expect(instance.control.value)
.withContext('Expected value to stay the same.')
.toBe(initialValue);
expect(event.defaultPrevented)
.withContext('Expected default to be prevented.')
.toBe(true);
}));
it('should do nothing when typing on a closed multi-select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
const instance = multiFixture.componentInstance;
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
const initialValue = instance.control.value;
expect(instance.select.panelOpen).withContext('Expected panel to be closed.').toBe(false);
dispatchEvent(select, createKeyboardEvent('keydown', 80, 'p'));
expect(instance.select.panelOpen)
.withContext('Expected panel to stay closed.')
.toBe(false);
expect(instance.control.value)
.withContext('Expected value to stay the same.')
.toBe(initialValue);
}));
it('should do nothing if the key manager did not change the active item', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
expect(formControl.value)
.withContext('Expected form control value to be empty.')
.toBeNull();
expect(formControl.pristine).withContext('Expected form control to be clean.').toBe(true);
dispatchKeyboardEvent(select, 'keydown', 16); // Press a random key.
expect(formControl.value)
.withContext('Expected form control value to stay empty.')
.toBeNull();
expect(formControl.pristine)
.withContext('Expected form control to stay clean.')
.toBe(true);
}));
it('should continue from the selected option when the value is set programmatically', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
formControl.setValue('eggs-5');
fixture.detectChanges();
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(formControl.value).toBe('pasta-6');
expect(fixture.componentInstance.options.toArray()[6].selected).toBe(true);
flush();
}));
it(
'should not shift focus when the selected options are updated programmatically ' +
'in a multi select',
fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
multiFixture.componentInstance.select.open();
multiFixture.detectChanges();
const options = overlayContainerElement.querySelectorAll(
'mat-option',
) as NodeListOf<HTMLElement>;
options[3].focus();
expect(document.activeElement)
.withContext('Expected fourth option to be focused.')
.toBe(options[3]);
multiFixture.componentInstance.control.setValue(['steak-0', 'sushi-7']);
multiFixture.detectChanges();
expect(document.activeElement)
.withContext('Expected fourth option to remain focused.')
.toBe(options[3]);
}),
);
it('should not cycle through the options if the control is disabled', fakeAsync(() => {
const formControl = fixture.componentInstance.control;
formControl.setValue('eggs-5');
formControl.disable();
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(formControl.value)
.withContext('Expected value to remain unchaged.')
.toBe('eggs-5');
}));
it('should not wrap selection after reaching the end of the options', fakeAsync(() => {
const lastOption = fixture.componentInstance.options.last;
fixture.componentInstance.options.forEach(() => {
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
});
expect(lastOption.selected)
.withContext('Expected last option to be selected.')
.toBe(true);
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(lastOption.selected)
.withContext('Expected last option to stay selected.')
.toBe(true);
flush();
}));
it('should not open a multiple select when tabbing through', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
expect(multiFixture.componentInstance.select.panelOpen)
.withContext('Expected panel to be closed initially.')
.toBe(false);
dispatchKeyboardEvent(select, 'keydown', TAB);
expect(multiFixture.componentInstance.select.panelOpen)
.withContext('Expected panel to stay closed.')
.toBe(false);
}));
it('should toggle the next option when pressing shift + DOWN_ARROW on a multi-select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
const event = createKeyboardEvent('keydown', DOWN_ARROW, undefined, {shift: true});
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
multiFixture.componentInstance.select.open();
multiFixture.detectChanges();
flush();
expect(multiFixture.componentInstance.select.value).toBeFalsy();
dispatchEvent(select, event);
multiFixture.detectChanges();
expect(multiFixture.componentInstance.select.value).toEqual(['pizza-1']);
dispatchEvent(select, event);
multiFixture.detectChanges();
expect(multiFixture.componentInstance.select.value).toEqual(['pizza-1', 'tacos-2']);
}));
it('should toggle the previous option when pressing shift + UP_ARROW on a multi-select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
const event = createKeyboardEvent('keydown', UP_ARROW, undefined, {shift: true});
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
multiFixture.componentInstance.select.open();
multiFixture.detectChanges();
flush();
// Move focus down first.
for (let i = 0; i < 5; i++) {
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
multiFixture.detectChanges();
}
expect(multiFixture.componentInstance.select.value).toBeFalsy();
dispatchEvent(select, event);
multiFixture.detectChanges();
expect(multiFixture.componentInstance.select.value).toEqual(['chips-4']);
dispatchEvent(select, event);
multiFixture.detectChanges();
expect(multiFixture.componentInstance.select.value).toEqual(['sandwich-3', 'chips-4']);
}));
it('should prevent the default action when pressing space', fakeAsync(() => {
const event = dispatchKeyboardEvent(select, 'keydown', SPACE);
expect(event.defaultPrevented).toBe(true);
}));
it('should prevent the default action when pressing enter', fakeAsync(() => {
const event = dispatchKeyboardEvent(select, 'keydown', ENTER);
expect(event.defaultPrevented).toBe(true);
}));
it('should not prevent the default actions on selection keys when pressing a modifier', fakeAsync(() => {
[ENTER, SPACE].forEach(key => {
const event = createKeyboardEvent('keydown', key, undefined, {shift: true});
expect(event.defaultPrevented).toBe(false);
});
}));
it('should consider the selection a result of a user action when closed', fakeAsync(() => {
const option = fixture.componentInstance.options.first;
const spy = jasmine.createSpy('option selection spy');
const subscription = option.onSelectionChange
.pipe(map(e => e.isUserInput))
.subscribe(spy);
dispatchKeyboardEvent(select, 'keydown', DOWN_ARROW);
expect(spy).toHaveBeenCalledWith(true);
subscription.unsubscribe();
flush();
}));
it('should be able to focus the select trigger', fakeAsync(() => {
document.body.focus(); // ensure that focus isn't on the trigger already
fixture.componentInstance.select.focus();
expect(document.activeElement)
.withContext('Expected select element to be focused.')
.toBe(select);
}));
it('should set `aria-multiselectable` to true on the listbox inside multi select', fakeAsync(() => {
fixture.destroy();
const multiFixture = TestBed.createComponent(MultiSelect);
multiFixture.detectChanges();
select = multiFixture.debugElement.query(By.css('mat-select'))!.nativeElement;
multiFixture.componentInstance.select.open();
multiFixture.detectChanges();
flush();
const panel = document.querySelector('.mat-mdc-select-panel')!;
expect(panel.getAttribute('aria-multiselectable')).toBe('true');
}));
it('should set aria-multiselectable false on single-selection instances', fakeAsync(() => {
fixture.componentInstance.select.open();
fixture.detectChanges();
flush();
const panel = document.querySelector('.mat-mdc-select-panel')!;
expect(panel.getAttribute('aria-multiselectable')).toBe('false');
}));