08-27-周三_17-09-29

node_modules/delegate/test/closest.js

@@ -0,0 +1,45 @@
+var closest = require('../src/closest');
+
+describe('closest', function() {
+    before(function() {
+        var html = '<div id="a">' +
+                        '<div id="b">' +
+                            '<div id="c"></div>' +
+                        '</div>' +
+                    '</div>';
+
+        document.body.innerHTML += html;
+
+        global.a = document.querySelector('#a');
+        global.b = document.querySelector('#b');
+        global.c = document.querySelector('#c');
+    });
+
+    after(function() {
+        document.body.innerHTML = '';
+    });
+
+    it('should return the closest parent based on the selector', function() {
+        assert.ok(closest(global.c, '#b'), global.b);
+        assert.ok(closest(global.c, '#a'), global.a);
+        assert.ok(closest(global.b, '#a'), global.a);
+    });
+
+    it('should return itself if the same selector is passed', function() {
+        assert.ok(closest(document.body, 'body'), document.body);
+    });
+
+    it('should not throw on elements without matches()', function() {
+        var fakeElement = {
+            nodeType: -1, // anything but DOCUMENT_NODE_TYPE
+            parentNode: null,
+            matches: undefined // undefined to emulate Elements without this function
+        };
+
+        try {
+            closest(fakeElement, '#a')
+        } catch (err) {
+            assert.fail();
+        }
+    });
+});