1 files changed, 58 insertions, 0 deletions
diff --git a/toolkit/components/places/tests/unit/test_PlacesObservers_counts.js b/toolkit/components/places/tests/unit/test_PlacesObservers_counts.js
new file mode 100644
index 0000000000..3eb7c2d2a9
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+++ b/toolkit/components/places/tests/unit/test_PlacesObservers_counts.js
@@ -0,0 +1,58 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test PlacesObservers.counts.
+
+add_task(async function test_counts() {
+  const url = "http://example.com/title";
+  await PlacesUtils.history.insertMany([
+    {
+      title: "will change",
+      url,
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "changed",
+      url,
+      referrer: url,
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+    {
+      title: "another",
+      url: "http://example.com/another",
+      visits: [{ transition: TRANSITION_LINK }],
+    },
+  ]);
+  await PlacesUtils.bookmarks.insert({
+    url,
+    parentGuid: PlacesUtils.bookmarks.toolbarGuid,
+  });
+  await PlacesUtils.history.clear();
+  await PlacesUtils.bookmarks.eraseEverything;
+
+  Assert.strictEqual(
+    PlacesObservers.counts.get("non-existing"),
+    undefined,
+    "Check non existing event returns undefined"
+  );
+  Assert.strictEqual(
+    PlacesObservers.counts.get("page-removed"),
+    0,
+    "Check non fired event returns 0"
+  );
+  Assert.strictEqual(
+    PlacesObservers.counts.get("page-visited"),
+    3,
+    "Check fired event `page-visited`"
+  );
+  Assert.strictEqual(
+    PlacesObservers.counts.get("history-cleared"),
+    1,
+    "Check fired event `history-cleared`"
+  );
+  Assert.strictEqual(
+    PlacesObservers.counts.get("bookmark-added"),
+    1,
+    "Check fired event `bookmark-added`"
+  );
+});