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fix(common): then and else template might be set to null (#22298)

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PR Close #22298
This commit is contained in:
Victor Berchet
2018-02-18 18:41:43 -08:00
parent c726d1d6d3
commit af6a0563de
3 changed files with 38 additions and 5 deletions
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33
packages/common/test/directives/ng_if_spec.ts
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@ -138,7 +138,7 @@ import {expect} from '@angular/platform-browser/testing/src/matchers';
expect(fixture.nativeElement).toHaveText('hello');
}));
describe('else', () => {
describe('then/else templates', () => {
it('should support else', async(() => {
const template = '<span *ngIf="booleanCondition; else elseBlock">TRUE</span>' +
'<ng-template #elseBlock>FALSE</ng-template>';
@ -169,6 +169,37 @@ import {expect} from '@angular/platform-browser/testing/src/matchers';
expect(fixture.nativeElement).toHaveText('ELSE');
}));
it('should support removing the then/else templates', () => {
const template = `<span *ngIf="booleanCondition;
then nestedBooleanCondition ? tplRef : null;
else nestedBooleanCondition ? tplRef : null"></span>
<ng-template #tplRef>Template</ng-template>`;
fixture = createTestComponent(template);
const comp = fixture.componentInstance;
// then template
comp.booleanCondition = true;
comp.nestedBooleanCondition = true;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Template');
comp.nestedBooleanCondition = false;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
// else template
comp.booleanCondition = true;
comp.nestedBooleanCondition = true;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('Template');
comp.nestedBooleanCondition = false;
fixture.detectChanges();
expect(fixture.nativeElement).toHaveText('');
});
it('should support dynamic else', async(() => {
const template =
'<span *ngIf="booleanCondition; else nestedBooleanCondition ? b1 : b2">TRUE</span>' +