From 3ff4935740b569fe79994a74fe437bac0b979854 Mon Sep 17 00:00:00 2001
From: John Freeman <jfreeman08@gmail.com>
Date: Sun, 7 Oct 2018 13:47:22 -0500
Subject: [PATCH 1/4] Add countTimers method

Closes #213
---
 src/lolex-src.js   |  5 ++++-
 test/lolex-test.js | 16 ++++++++++++++++
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/src/lolex-src.js b/src/lolex-src.js
index 7b9999c9..ee5226aa 100644
--- a/src/lolex-src.js
+++ b/src/lolex-src.js
@@ -257,7 +257,6 @@ function withGlobal(_global) {
         return timer.id;
     }
 
-
     /* eslint consistent-return: "off" */
     function compareTimers(a, b) {
         // Sort first by absolute timing
@@ -574,6 +573,10 @@ function withGlobal(_global) {
             return clearTimer(clock, timerId, "Immediate");
         };
 
+        clock.countTimers = function countTimers() {
+            return Object.keys(clock.timers).length;
+        };
+
         clock.requestAnimationFrame = function requestAnimationFrame(func) {
             var result = addTimer(clock, {
                 func: func,
diff --git a/test/lolex-test.js b/test/lolex-test.js
index a8097839..a068cc92 100644
--- a/test/lolex-test.js
+++ b/test/lolex-test.js
@@ -432,6 +432,22 @@ describe("lolex", function () {
 
     });
 
+    describe("countTimers", function () {
+
+        beforeEach(function () {
+            this.clock = lolex.createClock();
+        });
+
+        it("counts remaining timers", function () {
+            this.clock.setTimeout(NOOP, 100);
+            this.clock.setTimeout(NOOP, 200);
+            this.clock.setTimeout(NOOP, 300);
+            this.clock.tick(150);
+            assert.equals(this.clock.countTimers(), 2);
+        });
+
+    });
+
     describe("tick", function () {
 
         beforeEach(function () {

From a5e56bbe7ebf3e1cc0e2762de3ba6e98107a9f9b Mon Sep 17 00:00:00 2001
From: John Freeman <jfreeman08@gmail.com>
Date: Sun, 7 Oct 2018 13:54:00 -0500
Subject: [PATCH 2/4] Handle fresh clock

---
 src/lolex-src.js   | 2 +-
 test/lolex-test.js | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/lolex-src.js b/src/lolex-src.js
index ee5226aa..9ff3fedb 100644
--- a/src/lolex-src.js
+++ b/src/lolex-src.js
@@ -574,7 +574,7 @@ function withGlobal(_global) {
         };
 
         clock.countTimers = function countTimers() {
-            return Object.keys(clock.timers).length;
+            return Object.keys(clock.timers || {}).length;
         };
 
         clock.requestAnimationFrame = function requestAnimationFrame(func) {
diff --git a/test/lolex-test.js b/test/lolex-test.js
index a068cc92..a5db30f4 100644
--- a/test/lolex-test.js
+++ b/test/lolex-test.js
@@ -438,6 +438,11 @@ describe("lolex", function () {
             this.clock = lolex.createClock();
         });
 
+        it("return zero for a fresh clock", function () {
+            assert.equals(this.clock.countTimers(), 0);
+        });
+
+
         it("counts remaining timers", function () {
             this.clock.setTimeout(NOOP, 100);
             this.clock.setTimeout(NOOP, 200);

From 6b5f51f47a8cc4d9c76aa79cebdf5a4df70cdcf6 Mon Sep 17 00:00:00 2001
From: John Freeman <jfreeman08@gmail.com>
Date: Sun, 7 Oct 2018 13:56:59 -0500
Subject: [PATCH 3/4] Add documentation for countTimers

---
 Readme.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Readme.md b/Readme.md
index 020781be..a4232bd2 100644
--- a/Readme.md
+++ b/Readme.md
@@ -200,6 +200,11 @@ available in both browser & node environments.
 
 Cancels the callback scheduled by the provided id.
 
+### `clock.countTimers()`
+
+Returns the number of waiting timers. This can be used to assert that a test
+finishes without leaking any timers.
+
 ### `clock.hrtime(prevTime?)`
 Only available in Node.js, mimicks process.hrtime().
 

From 16769a1f5dbb5f9cfeac806428c314a1d32e13e3 Mon Sep 17 00:00:00 2001
From: John Freeman <jfreeman08@gmail.com>
Date: Sun, 7 Oct 2018 14:56:33 -0500
Subject: [PATCH 4/4] Remove extra empty line

---
 test/lolex-test.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/test/lolex-test.js b/test/lolex-test.js
index a5db30f4..6a390a41 100644
--- a/test/lolex-test.js
+++ b/test/lolex-test.js
@@ -442,7 +442,6 @@ describe("lolex", function () {
             assert.equals(this.clock.countTimers(), 0);
         });
 
-
         it("counts remaining timers", function () {
             this.clock.setTimeout(NOOP, 100);
             this.clock.setTimeout(NOOP, 200);