HTML completion tests

extensions/html/server/src/service/test/textEditSupport.ts

@@ -0,0 +1,23 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+'use strict';
+
+import {TextDocument, TextEdit} from 'vscode-languageserver-types';
+import * as assert from 'assert';
+
+export function applyEdits(document: TextDocument, edits: TextEdit[]): string {
+	let text = document.getText();
+	let sortedEdits = edits.sort((a, b) => document.offsetAt(b.range.start) - document.offsetAt(a.range.start));
+	let lastOffset = text.length;
+	sortedEdits.forEach(e => {
+		let startOffset = document.offsetAt(e.range.start);
+		let endOffset = document.offsetAt(e.range.end);
+		assert.ok(startOffset <= endOffset);
+		assert.ok(endOffset <= lastOffset);
+		text = text.substring(0, startOffset) + e.newText + text.substring(endOffset, text.length);
+		lastOffset = startOffset;
+	});
+	return text;
+}