1 files changed, 37 insertions, 0 deletions
diff --git a/toolkit/components/thumbnails/test/browser_thumbnails_capture.js b/toolkit/components/thumbnails/test/browser_thumbnails_capture.js
new file mode 100644
index 0000000000..5c6f95a64c
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+++ b/toolkit/components/thumbnails/test/browser_thumbnails_capture.js
@@ -0,0 +1,37 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * These tests ensure that capturing a sites's thumbnail, saving it and
+ * retrieving it from the cache works.
+ */
+add_task(async function thumbnails_capture() {
+  // Create a tab with a red background.
+  await BrowserTestUtils.withNewTab(
+    {
+      gBrowser,
+      url: "data:text/html,<body bgcolor=ff0000></body>",
+    },
+    async browser => {
+      await captureAndCheckColor(255, 0, 0, "we have a red thumbnail");
+
+      // Load a page with a green background.
+      let loaded = BrowserTestUtils.browserLoaded(browser);
+      BrowserTestUtils.startLoadingURIString(
+        browser,
+        "data:text/html,<body bgcolor=00ff00></body>"
+      );
+      await loaded;
+      await captureAndCheckColor(0, 255, 0, "we have a green thumbnail");
+
+      // Load a page with a blue background.
+      loaded = BrowserTestUtils.browserLoaded(browser);
+      BrowserTestUtils.startLoadingURIString(
+        browser,
+        "data:text/html,<body bgcolor=0000ff></body>"
+      );
+      await loaded;
+      await captureAndCheckColor(0, 0, 255, "we have a blue thumbnail");
+    }
+  );
+});