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feat(language-service): completions for output $event properties in (#34570)

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This commit adds support for completions of properties on `$event`
variables in bound outputs.

This is the second major PR to support completions for `$event`
variables (https://github.com/angular/vscode-ng-language-service/issues/531).
The final completion support that must be provided is for `$event`
variables in bindings targeting DOM events, like `(click)`.

PR Close #34570
This commit is contained in:
ayazhafiz
2019-12-26 13:26:54 -06:00
committed by Andrew Kushnir
parent c246787ccc
commit 2a537273ca
6 changed files with 64 additions and 24 deletions
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21
packages/language-service/test/diagnostics_spec.ts
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@ -319,16 +319,14 @@ describe('diagnostics', () => {
describe('with $event', () => {
it('should accept an event', () => {
const fileName = '/app/test.ng';
mockHost.override(fileName, '<div (click)="myClick($event)">Click me!</div>');
const diagnostics = ngLS.getSemanticDiagnostics(fileName);
mockHost.override(TEST_TEMPLATE, '<div (click)="myClick($event)">Click me!</div>');
const diagnostics = ngLS.getSemanticDiagnostics(TEST_TEMPLATE);
expect(diagnostics).toEqual([]);
});
it('should reject it when not in an event binding', () => {
const fileName = '/app/test.ng';
const content = mockHost.override(fileName, '<div [tabIndex]="$event"></div>');
const diagnostics = ngLS.getSemanticDiagnostics(fileName) !;
const content = mockHost.override(TEST_TEMPLATE, '<div [tabIndex]="$event"></div>');
const diagnostics = ngLS.getSemanticDiagnostics(TEST_TEMPLATE) !;
expect(diagnostics.length).toBe(1);
const {messageText, start, length} = diagnostics[0];
expect(messageText)
@ -338,6 +336,17 @@ describe('diagnostics', () => {
expect(start).toBe(content.lastIndexOf(keyword));
expect(length).toBe(keyword.length);
});
it('should reject invalid properties on an event type', () => {
const content = mockHost.override(
TEST_TEMPLATE, '<div string-model (modelChange)="$event.notSubstring()"></div>');
const diagnostics = ngLS.getSemanticDiagnostics(TEST_TEMPLATE) !;
expect(diagnostics.length).toBe(1);
const {messageText, start, length} = diagnostics[0];
expect(messageText).toBe(`Unknown method 'notSubstring'`);
expect(start).toBe(content.indexOf('$event'));
expect(length).toBe('$event.notSubstring()'.length);
});
});
it('should not crash with a incomplete *ngFor', () => {