1 files changed, 37 insertions, 0 deletions
diff --git a/spec/lib/gitlab/reference_counter_spec.rb b/spec/lib/gitlab/reference_counter_spec.rb
new file mode 100644
index 00000000000..b2344d1870a
--- /dev/null
+++ b/spec/lib/gitlab/reference_counter_spec.rb
@@ -0,0 +1,37 @@
+require 'spec_helper'
+
+describe Gitlab::ReferenceCounter do
+  let(:redis) { double('redis') }
+  let(:reference_counter_key) { "git-receive-pack-reference-counter:project-1" }
+  let(:reference_counter) { described_class.new('project-1') }
+
+  before do
+    allow(Gitlab::Redis::SharedState).to receive(:with).and_yield(redis)
+  end
+
+  it 'increases and set the expire time of a reference count for a path' do
+    expect(redis).to receive(:incr).with(reference_counter_key)
+    expect(redis).to receive(:expire).with(reference_counter_key,
+        described_class::REFERENCE_EXPIRE_TIME)
+    expect(reference_counter.increase).to be(true)
+  end
+
+  it 'decreases the reference count for a path' do
+    allow(redis).to receive(:decr).and_return(0)
+    expect(redis).to receive(:decr).with(reference_counter_key)
+    expect(reference_counter.decrease).to be(true)
+  end
+
+  it 'warns if attempting to decrease a counter with a value of one or less, and resets the counter' do
+    expect(redis).to receive(:decr).and_return(-1)
+    expect(redis).to receive(:del)
+    expect(Rails.logger).to receive(:warn).with("Reference counter for project-1" \
+        " decreased when its value was less than 1. Reseting the counter.")
+    expect(reference_counter.decrease).to be(true)
+  end
+
+  it 'get the reference count for a path' do
+    allow(redis).to receive(:get).and_return(1)
+    expect(reference_counter.value).to be(1)
+  end
+end