Merge pull request #738 from sonatype/nx-assert

Add NX.assert() helper

nexus-webapp/src/main/webapp/js/lib/nx-assert.js

@@ -0,0 +1,52 @@
+/*
+ * Sonatype Nexus (TM) Open Source Version
+ * Copyright (c) 2007-2012 Sonatype, Inc.
+ * All rights reserved. Includes the third-party code listed at http://links.sonatype.com/products/nexus/oss/attributions.
+ *
+ * This program and the accompanying materials are made available under the terms of the Eclipse Public License Version 1.0,
+ * which accompanies this distribution and is available at http://www.eclipse.org/legal/epl-v10.html.
+ *
+ * Sonatype Nexus (TM) Professional Version is available from Sonatype, Inc. "Sonatype" and "Sonatype Nexus" are trademarks
+ * of Sonatype, Inc. Apache Maven is a trademark of the Apache Software Foundation. M2eclipse is a trademark of the
+ * Eclipse Foundation. All other trademarks are the property of their respective owners.
+ */
+
+/*global Ext,NX,global,require */
+
+Ext.ns('NX');
+
+/**
+ * Exception thrown when assertion is triggered.
+ *
+ * @param message
+ * @constructor
+ *
+ * @since 2.4
+ */
+function AssertError(message) {
+    this.name = 'AssertError';
+    this.message = message || 'Assertion failure';
+}
+AssertError.prototype = new Error();
+AssertError.prototype.constructor = AssertError;
+
+/**
+ * Assertion helpers.
+ */
+Ext.apply(NX, {
+
+    /**
+     * Assert a condition.  When the condition expression is false and exception is thrown.
+     *
+     * @param expression    Condition expression
+     * @param message       Exception message
+     *
+     * @since 2.4
+     */
+    assert: function (expression, message) {
+        if (!expression) {
+            throw new AssertError(message);
+        }
+    }
+
+});