virtual doc - support content provider signalling change via onDidChange event

extensions/vscode-api-tests/src/workspace.test.ts

@@ -6,11 +6,10 @@
 'use strict';
 
 import * as assert from 'assert';
-import {workspace, TextDocument, window, Position, Uri, CancellationTokenSource} from 'vscode';
+import {workspace, TextDocument, window, Position, Uri, CancellationTokenSource, Disposable} from 'vscode';
 import {createRandomFile, deleteFile, cleanUp, pathEquals} from './utils';
 import {join, basename} from 'path';
 import * as fs from 'fs';
-import * as os from 'os';
 
 suite('workspace-namespace', () => {
 
@@ -209,6 +208,50 @@ suite('workspace-namespace', () => {
 		});
 	});
 
+	test('registerTextDocumentContentProvider, change event', function() {
+
+		let callCount = 0;
+		let listeners: Function[] = [];
+		let registration = workspace.registerTextDocumentContentProvider('foo', {
+			onDidChange(callback, thisArg, disposables) {
+				let actual = thisArg ? callback.bind(thisArg) : callback;
+				listeners.push(actual);
+				let subscription = new Disposable(() => {
+					const idx = listeners.indexOf(actual);
+					listeners.splice(idx, 1);
+				});
+				if (Array.isArray(disposables)) {
+					disposables.push(subscription);
+				}
+				return subscription;
+			},
+			provideTextDocumentContent(uri) {
+				return 'call' + (callCount++);
+			}
+		});
+
+		const uri = Uri.parse('foo://testing/path2');
+
+		return workspace.openTextDocument(uri).then(doc => {
+
+			assert.equal(callCount, 1);
+			assert.equal(doc.getText(), 'call0');
+
+			return new Promise((resolve, reject) => {
+
+				workspace.onDidChangeTextDocument(event => {
+					assert.ok(event.document === doc);
+					assert.equal(event.document.getText(), 'call1');
+					resolve();
+				});
+
+				listeners.forEach(l => l(doc.uri));
+
+				registration.dispose();
+			});
+		});
+	});
+
 	test('findFiles', () => {
 		return workspace.findFiles('*.js', null).then((res) => {
 			assert.equal(res.length, 1);
@@ -226,4 +269,4 @@ suite('workspace-namespace', () => {
 			assert.equal(res, void 0);
 		});
 	});
-});
+});