diff --git a/test/index.html b/test/index.html
index d4d63b1f0..35beabd3d 100644
--- a/test/index.html
+++ b/test/index.html
@@ -86,6 +86,9 @@
     <script src='spec/modes/add_point.js'></script>
     <script src='spec/modes/add_note.js'></script>
 
+    <script src='spec/operations/detach_node.js'></script>
+    <script src='spec/operations/straighten.js'></script>
+
     <script src='spec/osm/changeset.js'></script>
     <script src='spec/osm/entity.js'></script>
     <script src='spec/osm/intersection.js'></script>
@@ -158,7 +161,6 @@
     <script src='spec/validations/tag_suggests_area.js'></script>
     <script src='spec/validations/unknown_road.js'></script>
 
-    <script src='spec/operations/detach_node.js'></script>
     <script>
         window.mocha.run();
     </script>
diff --git a/test/spec/operations/straighten.js b/test/spec/operations/straighten.js
new file mode 100644
index 000000000..2f6743c4b
--- /dev/null
+++ b/test/spec/operations/straighten.js
@@ -0,0 +1,68 @@
+describe('iD.operationStraighten', function () {
+    var fakeContext;
+    var graph;
+
+    // Set up the fake context
+    fakeContext = {};
+    fakeContext.graph = function () { return graph; };
+    fakeContext.hasHiddenConnections = function () { return false; };
+
+    describe('#available', function () {
+        beforeEach(function () {
+            // w1 - way with 2 nodes
+            // w2 - way with 3 nodes connected to w1
+            // w3 - way with 3 nodes connected to w2
+            // w4 - way with 3 nodes not connected to other ways
+            graph = iD.coreGraph([
+                iD.osmNode({ id: 'n1', type: 'node' }),
+                iD.osmNode({ id: 'n2', type: 'node' }),
+                iD.osmNode({ id: 'n3', type: 'node' }),
+                iD.osmNode({ id: 'n4', type: 'node' }),
+                iD.osmNode({ id: 'n5', type: 'node' }),
+                iD.osmNode({ id: 'n6', type: 'node' }),
+                iD.osmNode({ id: 'n7', type: 'node' }),
+                iD.osmNode({ id: 'n8', type: 'node' }),
+                iD.osmNode({ id: 'n9', type: 'node' }),
+                iD.osmWay({ id: 'w1', nodes: ['n1', 'n2'] }),
+                iD.osmWay({ id: 'w2', nodes: ['n2', 'n3', 'n4'] }),
+                iD.osmWay({ id: 'w3', nodes: ['n4', 'n5', 'n6'] }),
+                iD.osmWay({ id: 'w4', nodes: ['n7', 'n8', 'n9'] })
+            ]);
+        });
+
+        it('is not available for no selected ids', function () {
+            var result = iD.operationStraighten([], fakeContext.graph()).available();
+            expect(result).to.be.not.ok;
+        });
+
+        it('is not available for way with only 2 nodes', function () {
+            var result = iD.operationStraighten(['w1'], fakeContext.graph()).available();
+            expect(result).to.be.not.ok;
+        });
+
+        it('is not available for unknown selected id', function () {
+            var result = iD.operationStraighten(['w0'], fakeContext.graph()).available();
+            expect(result).to.be.not.ok;
+        });
+
+        it('is not available for non-continuous ways', function () {
+            var result = iD.operationStraighten(['w3', 'w4'], fakeContext.graph()).available();
+            expect(result).to.be.not.ok;
+        });
+
+        it('is available for selected way with more than 2 nodes', function () {
+            var result = iD.operationStraighten(['w2'], fakeContext.graph()).available();
+            expect(result).to.be.ok;
+        });
+
+        it('is available for selected, ordered, continuous ways', function () {
+            var result = iD.operationStraighten(['w1', 'w2', 'w3'], fakeContext.graph()).available();
+            expect(result).to.be.ok;
+        });
+
+        it('is available for selected, un-ordered, continuous ways', function () {
+            var result = iD.operationStraighten(['w1', 'w3', 'w2'], fakeContext.graph()).available();
+            expect(result).to.be.ok;
+        });
+    });
+});