2 files changed, 45 insertions, 1 deletions
diff --git a/tests/unit_tests/completion_test.coffee b/tests/unit_tests/completion_test.coffee
index 44989267..88f59b7e 100644
--- a/tests/unit_tests/completion_test.coffee
+++ b/tests/unit_tests/completion_test.coffee
@@ -1,8 +1,8 @@
 require "./test_helper.js"
 extend(global, require "../../lib/utils.js")
 extend(global, require "../../background_scripts/completion.js")
+extend global, require "./test_chrome_stubs.js"
 
-global.chrome = {}
 global.document =
   createElement: -> {}
 
@@ -399,6 +399,46 @@ context "RegexpCache",
   should "search for a string with a prefix/suffix (negative case)", ->
     assert.isTrue "hound dog".search(RegexpCache.get("do", "\\b", "\\b")) == -1
 
+context "TabRecency",
+  setup ->
+    @tabRecency = new TabRecency()
+    @tabRecency.add 3
+    @tabRecency.add 2
+    @tabRecency.add 9
+    @tabRecency.add 1
+    @tabRecency.remove 9
+    @tabRecency.add 4
+
+  should "have entries for active tabs", ->
+    assert.isTrue @tabRecency.cache[1]
+    assert.isTrue @tabRecency.cache[2]
+    assert.isTrue @tabRecency.cache[3]
+    assert.isTrue @tabRecency.cache[4]
+
+  should "not have entries for removed tabs", ->
+    assert.isFalse @tabRecency.cache[9]
+
+  should "give a high score to the most recent tab", ->
+    assert.isTrue @tabRecency.recencyScore(4) < @tabRecency.recencyScore 1
+    assert.isTrue @tabRecency.recencyScore(3) < @tabRecency.recencyScore 1
+    assert.isTrue @tabRecency.recencyScore(2) < @tabRecency.recencyScore 1
+
+  should "give a low score to the current tab", ->
+    assert.isTrue @tabRecency.recencyScore(1) > @tabRecency.recencyScore 4
+    assert.isTrue @tabRecency.recencyScore(2) > @tabRecency.recencyScore 4
+    assert.isTrue @tabRecency.recencyScore(3) > @tabRecency.recencyScore 4
+
+  should "rank tabs by recency", ->
+    assert.isTrue @tabRecency.recencyScore(3) < @tabRecency.recencyScore 2
+    assert.isTrue @tabRecency.recencyScore(2) < @tabRecency.recencyScore 1
+    @tabRecency.add 3
+    @tabRecency.add 4 # Making 3 the most recent tab which isn't the current tab.
+    assert.isTrue @tabRecency.recencyScore(1) < @tabRecency.recencyScore 3
+    assert.isTrue @tabRecency.recencyScore(2) < @tabRecency.recencyScore 3
+    assert.isTrue @tabRecency.recencyScore(4) < @tabRecency.recencyScore 3
+    assert.isTrue @tabRecency.recencyScore(4) < @tabRecency.recencyScore 1
+    assert.isTrue @tabRecency.recencyScore(4) < @tabRecency.recencyScore 2
+
 # A convenience wrapper around completer.filter() so it can be called synchronously in tests.
 filterCompleter = (completer, queryTerms) ->
   results = []
diff --git a/tests/unit_tests/test_chrome_stubs.coffee b/tests/unit_tests/test_chrome_stubs.coffee
index 2abd26c9..80750337 100644
--- a/tests/unit_tests/test_chrome_stubs.coffee
+++ b/tests/unit_tests/test_chrome_stubs.coffee
@@ -30,6 +30,10 @@ exports.chrome =
       addListener: () -> true
     onActiveChanged:
       addListener: () -> true
+    onActivated:
+      addListener: () -> true
+    onReplaced:
+      addListener: () -> true
     query: () -> true
 
   windows: