implement pinch to zoom

node_modules/component-matches-selector/test/tests.js

@@ -0,0 +1,35 @@
+
+var matches = require('matches-selector')
+  , domify = require('domify');
+
+function assert(expr) {
+  if (!expr) throw new Error('assertion failed');
+}
+
+var ul = domify('<ul><li><em>foo</em></li></ul>');
+var li = ul.children[0];
+var em = li.children[0];
+
+describe('matchesSelector(el, selector)', function(){
+  it('should work', function(){
+    assert(true === matches(em, 'ul li em'));
+    assert(true === matches(em, 'ul em'));
+    assert(true === matches(em, 'ul > li > em'));
+    assert(false === matches(em, 'ul ul em'));
+
+    assert(true === matches(li, 'ul li'));
+    assert(true === matches(li, 'ul > li'));
+    assert(true === matches(li, 'li'));
+    assert(false === matches(li, 'div > li'));
+
+    assert(true == matches(ul, 'ul'));
+    assert(false == matches(ul, 'div ul'));
+    assert(false == matches(ul, 'body > ul'));
+  })
+  it('should not throw an Error when given `null`', function(){
+    assert(false == matches(null, 'ul'));
+  })
+  it('should not throw an Error when given a TextNode', function(){
+    assert(false == matches(em.firstChild, 'ul'));
+  })
+})