1 files changed, 71 insertions, 0 deletions
diff --git a/dom/cache/test/mochitest/test_cache_overwrite.js b/dom/cache/test/mochitest/test_cache_overwrite.js
new file mode 100644
index 0000000000..dd6b3c5848
--- /dev/null
+++ b/dom/cache/test/mochitest/test_cache_overwrite.js
@@ -0,0 +1,71 @@
+/* global context testDone:true */
+
+var requestURL =
+  "//mochi.test:8888/tests/dom/cache/test/mochitest/mirror.sjs?" + context;
+var response;
+var c;
+var responseText;
+var name = "match-mirror" + context;
+
+function checkResponse(r) {
+  ok(r !== response, "The objects should not be the same");
+  is(
+    r.url,
+    response.url.replace("#fragment", ""),
+    "The URLs should be the same"
+  );
+  is(r.status, response.status, "The status codes should be the same");
+  is(r.type, response.type, "The response types should be the same");
+  is(r.ok, response.ok, "Both responses should have succeeded");
+  is(
+    r.statusText,
+    response.statusText,
+    "Both responses should have the same status text"
+  );
+  is(
+    r.headers.get("Mirrored"),
+    response.headers.get("Mirrored"),
+    "Both responses should have the same Mirrored header"
+  );
+  return r.text().then(function (text) {
+    is(text, responseText, "The response body should be correct");
+  });
+}
+
+fetch(new Request(requestURL, { headers: { Mirror: "bar" } }))
+  .then(function (r) {
+    is(
+      r.headers.get("Mirrored"),
+      "bar",
+      "The server should give back the correct header"
+    );
+    response = r;
+    return response.text();
+  })
+  .then(function (text) {
+    responseText = text;
+    return caches.open(name);
+  })
+  .then(function (cache) {
+    c = cache;
+    return c.add(new Request(requestURL, { headers: { Mirror: "foo" } }));
+  })
+  .then(function () {
+    // Overwrite the request, to replace the entry stored in response_headers
+    // with a different value.
+    return c.add(new Request(requestURL, { headers: { Mirror: "bar" } }));
+  })
+  .then(function () {
+    return c.matchAll();
+  })
+  .then(function (r) {
+    is(r.length, 1, "Only one request should be in the cache");
+    return checkResponse(r[0]);
+  })
+  .then(function () {
+    return caches.delete(name);
+  })
+  .then(function (deleted) {
+    ok(deleted, "The cache should be deleted successfully");
+    testDone();
+  });