tests: add test for role-img-alt for serial nodes (#2402)

test/integration/virtual-rules/index.html

@@ -32,6 +32,7 @@
 		<script src="aria-toggle-field-name.js"></script>
 		<script src="aria-input-field-name.js"></script>
 		<script src="area-alt.js"></script>
+		<script src="role-img-alt.js"></script>
 		<script src="/test/integration/adapter.js"></script>
 	</body>
 </html>

test/integration/virtual-rules/role-img-alt.js

@@ -0,0 +1,104 @@
+describe('role-img-alt', function() {
+	it('should pass for aria-label', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				'aria-label': 'foobar'
+			}
+		});
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 1);
+		assert.lengthOf(results.violations, 0);
+		assert.lengthOf(results.incomplete, 0);
+	});
+
+	it('should incomplete for aria-labelledby', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				'aria-labelledby': 'foobar'
+			}
+		});
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 0);
+		assert.lengthOf(results.violations, 0);
+		assert.lengthOf(results.incomplete, 1);
+	});
+
+	it('should pass for title', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				title: 'foobar'
+			}
+		});
+
+		// children are required since titleText comes after subtree text
+		// in accessible name calculation
+		node.children = [];
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 1);
+		assert.lengthOf(results.violations, 0);
+		assert.lengthOf(results.incomplete, 0);
+	});
+
+	it('should fail when aria-label contains only whitespace', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				'aria-label': ' \t   \n   '
+			}
+		});
+		node.children = [];
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 0);
+		assert.lengthOf(results.violations, 1);
+		assert.lengthOf(results.incomplete, 0);
+	});
+
+	it('should fail when aria-label is empty', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				'aria-label': ''
+			}
+		});
+		node.children = [];
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 0);
+		assert.lengthOf(results.violations, 1);
+		assert.lengthOf(results.incomplete, 0);
+	});
+
+	it('should fail when title is empty', function() {
+		var node = new axe.SerialVirtualNode({
+			nodeName: 'div',
+			attributes: {
+				role: 'img',
+				title: ''
+			}
+		});
+		node.children = [];
+
+		var results = axe.runVirtualRule('role-img-alt', node);
+
+		assert.lengthOf(results.passes, 0);
+		assert.lengthOf(results.violations, 1);
+		assert.lengthOf(results.incomplete, 0);
+	});
+});