Add latest changes from gitlab-org/gitlab@12-4-stable-ee

1 files changed, 40 insertions, 0 deletions

diff --git a/spec/lib/gitlab/metrics/system_spec.rb b/spec/lib/gitlab/metrics/system_spec.rb
index 6d2764a06f2..a5aa80686fd 100644
--- a/spec/lib/gitlab/metrics/system_spec.rb
+++ b/spec/lib/gitlab/metrics/system_spec.rb
@@ -58,4 +58,44 @@ describe Gitlab::Metrics::System do
       expect(described_class.monotonic_time).to be_an(Float)
     end
   end
+
+  describe '.thread_cpu_time' do
+    it 'returns cpu_time on supported platform' do
+      stub_const("Process::CLOCK_THREAD_CPUTIME_ID", 16)
+
+      expect(Process).to receive(:clock_gettime)
+        .with(16, kind_of(Symbol)) { 0.111222333 }
+
+      expect(described_class.thread_cpu_time).to eq(0.111222333)
+    end
+
+    it 'returns nil on unsupported platform' do
+      hide_const("Process::CLOCK_THREAD_CPUTIME_ID")
+
+      expect(described_class.thread_cpu_time).to be_nil
+    end
+  end
+
+  describe '.thread_cpu_duration' do
+    let(:start_time) { described_class.thread_cpu_time }
+
+    it 'returns difference between start and current time' do
+      stub_const("Process::CLOCK_THREAD_CPUTIME_ID", 16)
+
+      expect(Process).to receive(:clock_gettime)
+        .with(16, kind_of(Symbol))
+        .and_return(
+          0.111222333,
+          0.222333833
+        )
+
+      expect(described_class.thread_cpu_duration(start_time)).to eq(0.1111115)
+    end
+
+    it 'returns nil on unsupported platform' do
+      hide_const("Process::CLOCK_THREAD_CPUTIME_ID")
+
+      expect(described_class.thread_cpu_duration(start_time)).to be_nil
+    end
+  end
 end