Add tests for Detach Node operation

test/index.html

@@ -140,6 +140,7 @@
     <script src='spec/util/suggest_names.js'></script>
     <script src='spec/util/util.js'></script>
 
+    <script src='spec/operations/detach_node.js'></script>
     <script>
         window.mocha.run();
     </script>

test/spec/operations/detach_node.js

@@ -0,0 +1,85 @@
+describe('iD.operationDetachNode', function () {
+    var fakeContext;
+    var graph;
+    var fakeTags = { 'name': 'fake' };
+    beforeEach(function () {
+        // Set up graph
+        var createFakeNode = function (id, hasTags) {
+            return hasTags
+                ? { id: id, type: 'node', tags: fakeTags }
+                : { id: id, type: 'node' };
+        };
+        // a - node with tags & parent way
+        // b - node with tags & 2 parent ways
+        // c - node with no tags, parent way
+        // d - node with no tags, 2 parent ways
+        // e - node with tags, no parent way
+        // f - node with no tags, no parent way
+        graph = iD.Graph([
+            iD.Node(createFakeNode('a', true)),
+            iD.Node(createFakeNode('b', true)),
+            iD.Node(createFakeNode('c', false)),
+            iD.Node(createFakeNode('d', false)),
+            iD.Node(createFakeNode('e', true)),
+            iD.Node(createFakeNode('f', false)),
+            iD.Way({ id: 'x', nodes: ['a', 'b', 'c', 'd'] }),
+            iD.Way({ id: 'y', nodes: ['b', 'd'] })
+        ]);
+
+        // Set up the fake context
+        fakeContext = {};
+        fakeContext.graph = function () {
+            return graph;
+        };
+    });
+
+    it('is not available for no selected ids', function () {
+        var result = iD.operationDetachNode([], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for two selected ids', function () {
+        var result = iD.operationDetachNode(['a', 'b'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for unkown selected id', function () {
+        var result = iD.operationDetachNode(['z'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for selected way', function () {
+        var result = iD.operationDetachNode(['x'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for selected node with tags, no parent way', function () {
+        var result = iD.operationDetachNode(['e'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for selected node with no tags, no parent way', function () {
+        var result = iD.operationDetachNode(['f'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for selected node with no tags, parent way', function () {
+        var result = iD.operationDetachNode(['c'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is not available for selected node with no tags, two parent ways', function () {
+        var result = iD.operationDetachNode(['d'], fakeContext).available();
+        expect(result).to.eql(false);
+    });
+
+    it('is available for selected node with tags, parent way', function () {
+        var result = iD.operationDetachNode(['a'], fakeContext).available();
+        expect(result).to.eql(true);
+    });
+
+    it('is available for selected node with tags, two parent ways', function () {
+        var result = iD.operationDetachNode(['b'], fakeContext).available();
+        expect(result).to.eql(true);
+    });
+});