1 files changed, 58 insertions, 0 deletions
diff --git a/qa/spec/specs/parallel_runner_spec.rb b/qa/spec/specs/parallel_runner_spec.rb
new file mode 100644
index 00000000000..67d94a1f648
--- /dev/null
+++ b/qa/spec/specs/parallel_runner_spec.rb
@@ -0,0 +1,58 @@
+# frozen_string_literal: true
+
+describe QA::Specs::ParallelRunner do
+  include Helpers::StubENV
+
+  before do
+    allow(QA::Runtime::Scenario).to receive(:attributes).and_return(parallel: true)
+    stub_env('GITLAB_QA_ACCESS_TOKEN', 'skip_token_creation')
+  end
+
+  it 'passes args to parallel_tests' do
+    expect_cli_arguments(['--tag', '~orchestrated', *QA::Specs::Runner::DEFAULT_TEST_PATH_ARGS])
+
+    subject.run(['--tag', '~orchestrated', *QA::Specs::Runner::DEFAULT_TEST_PATH_ARGS])
+  end
+
+  it 'passes a given test path to parallel_tests and adds a separator' do
+    expect_cli_arguments(%w[-- qa/specs/features/foo])
+
+    subject.run(%w[qa/specs/features/foo])
+  end
+
+  it 'passes tags and test paths to parallel_tests and adds a separator' do
+    expect_cli_arguments(%w[--tag smoke -- qa/specs/features/foo qa/specs/features/bar])
+
+    subject.run(%w[--tag smoke qa/specs/features/foo qa/specs/features/bar])
+  end
+
+  it 'passes tags and test paths with separators to parallel_tests' do
+    expect_cli_arguments(%w[-- --tag smoke -- qa/specs/features/foo qa/specs/features/bar])
+
+    subject.run(%w[-- --tag smoke -- qa/specs/features/foo qa/specs/features/bar])
+  end
+
+  it 'passes supported environment variables' do
+    # Test only env vars starting with GITLAB because some of the others
+    # affect how the runner behaves, and we're not concerned with those
+    # behaviors in this test
+    gitlab_env_vars = QA::Runtime::Env::ENV_VARIABLES.reject { |v| !v.start_with?('GITLAB') }
+
+    gitlab_env_vars.each do |k, v|
+      stub_env(k, v)
+    end
+
+    gitlab_env_vars['QA_RUNTIME_SCENARIO_ATTRIBUTES'] = '{"parallel":true}'
+
+    expect_cli_arguments([], gitlab_env_vars)
+
+    subject.run([])
+  end
+
+  def expect_cli_arguments(arguments, env = { 'QA_RUNTIME_SCENARIO_ATTRIBUTES' => '{"parallel":true}' })
+    cmd = "bundle exec parallel_test -t rspec --combine-stderr --serialize-stdout -- #{arguments.join(' ')}"
+    expect(Open3).to receive(:popen2e)
+      .with(hash_including(env), cmd)
+      .and_return(0)
+  end
+end