Core: Implements QUnit.skip

Fixes qunitjs#637
Fixes qunitjs#434

src/core.js

@@ -130,6 +130,25 @@ QUnit = {
 		test.queue();
 	},
 
+	skip: function( testName ) {
+		var test = new Test({
+			skip: true,
+			testName: testName,
+			expected: 0,
+			async: false,
+			callback: function() {},
+			module: config.currentModule,
+			moduleTestEnvironment: config.currentModuleTestEnvironment,
+			stack: sourceFromStacktrace( 2 )
+		});
+
+		if ( !validTest( test ) ) {
+			return;
+		}
+
+		test.queue();
+	},
+
 	start: function( count ) {
 		var message;
 

src/test.js

@@ -1,8 +1,21 @@
 function Test( settings ) {
+	var method, skippedAssertion;
+
 	extend( this, settings );
-	this.assert = new Assert( this );
 	this.assertions = [];
 	this.testNumber = ++Test.count;
+
+	skippedAssertion = function() {};
+
+	if ( settings.skip ) {
+		this.assert = {};
+		this.testName = "SKIPPED - " + this.testName;
+		for ( method in Assert.prototype ) {
+			this.assert[ method ] = skippedAssertion;
+		}
+	} else {
+		this.assert = new Assert( this );
+	}
 }
 
 Test.count = 0;

test/test.js

@@ -438,3 +438,23 @@ QUnit.test( "mod2", function( assert ) {
 	assert.mod2( 2, 0, "2 % 2 == 0" );
 	assert.mod2( 3, 1, "3 % 2 == 1" );
 });
+
+QUnit.module( "Skipped tests", {
+	beforeEach: function( assert ) {
+
+		// skip assertions on test hooks for skipped tests
+		assert.ok( false, "skipped function" );
+	},
+	afterEach: function( assert ) {
+		assert.ok( false, "skipped function" );
+	}
+});
+
+QUnit.skip( "assertions are skipped", function( assert ) {
+
+	// this test callback won't run, even with broken code
+	assert.expect( 1000 );
+	throw "Error";
+});
+
+QUnit.skip ( "no function" );