1 files changed, 36 insertions, 0 deletions
diff --git a/toolkit/components/places/tests/favicons/test_heavy_favicon.js b/toolkit/components/places/tests/favicons/test_heavy_favicon.js
new file mode 100644
index 0000000000..09adcaf6fa
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+++ b/toolkit/components/places/tests/favicons/test_heavy_favicon.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+ *    http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/*
+ * Tests a png with a large file size that can't fit MAX_FAVICON_BUFFER_SIZE,
+ * it should be downsized until it can be stored, rather than thrown away.
+ */
+
+add_task(async function () {
+  let file = do_get_file("noise.png");
+  let icon = {
+    file,
+    uri: NetUtil.newURI(file),
+    data: readFileData(file),
+    mimetype: "image/png",
+  };
+
+  // If this should fail, it means MAX_FAVICON_BUFFER_SIZE has been made bigger
+  // than this icon. For this test to make sense the icon shoul always be
+  // bigger than MAX_FAVICON_BUFFER_SIZE. Please update the icon!
+  Assert.ok(
+    icon.data.length > Ci.nsIFaviconService.MAX_FAVICON_BUFFER_SIZE,
+    "The test icon file size must be larger than Ci.nsIFaviconService.MAX_FAVICON_BUFFER_SIZE"
+  );
+
+  let pageURI = uri("http://foo.bar/");
+  await PlacesTestUtils.addVisits(pageURI);
+
+  PlacesUtils.favicons.replaceFaviconData(icon.uri, icon.data, icon.mimetype);
+  await setFaviconForPage(pageURI, icon.uri);
+  Assert.equal(
+    await getFaviconUrlForPage(pageURI),
+    icon.uri.spec,
+    "A resampled version of the icon should be stored"
+  );
+});