1 files changed, 83 insertions, 0 deletions
diff --git a/components/jetpack/diffpatcher/test/patch.js b/components/jetpack/diffpatcher/test/patch.js
new file mode 100644
index 000000000..dc2e38229
--- /dev/null
+++ b/components/jetpack/diffpatcher/test/patch.js
@@ -0,0 +1,83 @@
+"use strict";
+
+var patch = require("../patch")
+
+exports["test patch delete"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, { a: null }), { b: 2 }, "null removes property")
+}
+
+exports["test patch delete with void"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, { a: void(0) }), { b: 2 },
+                   "void(0) removes property")
+}
+
+exports["test patch delete missing"] = function(assert) {
+  assert.deepEqual(patch({ a: 1, b: 2 }, { c: null }),
+                   { a: 1, b: 2 },
+                   "null removes property if exists");
+
+  assert.deepEqual(patch({ a: 1, b: 2 }, { c: void(0) }),
+                   { a: 1, b: 2 },
+                   "void removes property if exists");
+}
+
+exports["test delete deleted"] = function(assert) {
+  assert.deepEqual(patch({ a: null, b: 2, c: 3, d: void(0)},
+                         { a: void(0), b: null, d: null }),
+                   {c: 3},
+                  "removed all existing and non existing");
+}
+
+exports["test update deleted"] = function(assert) {
+  assert.deepEqual(patch({ a: null, b: void(0), c: 3},
+                         { a: { b: 2 } }),
+                   { a: { b: 2 }, c: 3 },
+                   "replace deleted");
+}
+
+exports["test patch delete with void"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, { a: void(0) }), { b: 2 },
+                   "void(0) removes property")
+}
+
+
+exports["test patch addition"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, { c: 3 }), { a: 1, b: 2, c: 3 },
+                   "new properties are added")
+}
+
+exports["test patch addition"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, { c: 3 }), { a: 1, b: 2, c: 3 },
+                   "new properties are added")
+}
+
+exports["test hash on itself"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, hash), hash,
+                   "applying hash to itself returns hash itself")
+}
+
+exports["test patch with empty delta"] = function(assert) {
+  var hash = { a: 1, b: 2 }
+
+  assert.deepEqual(patch(hash, {}), hash,
+                   "applying empty delta results in no changes")
+}
+
+exports["test patch nested data"] = function(assert) {
+  assert.deepEqual(patch({ a: { b: 1 }, c: { d: 2 } },
+                         { a: { b: null, e: 3 }, c: { d: 4 } }),
+                   { a: { e: 3 }, c: { d: 4 } },
+                   "nested structures can also be patched")
+}