Merge branch 'qa-review-knapsack-ee' into 'master'

[EE] Run review-qa-all in parallel

See merge request gitlab-org/gitlab-ee!12695

qa/qa/specs/runner.rb

@@ -2,6 +2,7 @@
 
 require 'rspec/core'
 require 'rspec/expectations'
+require 'knapsack'
 
 module QA
   module Specs

qa/spec/runtime/env_spec.rb

@@ -192,6 +192,30 @@ describe QA::Runtime::Env do
     end
   end
 
+  describe '.knapsack?' do
+    it 'returns true if KNAPSACK_GENERATE_REPORT is defined' do
+      stub_env('KNAPSACK_GENERATE_REPORT', 'true')
+
+      expect(described_class.knapsack?).to be_truthy
+    end
+
+    it 'returns true if KNAPSACK_REPORT_PATH is defined' do
+      stub_env('KNAPSACK_REPORT_PATH', '/a/path')
+
+      expect(described_class.knapsack?).to be_truthy
+    end
+
+    it 'returns true if KNAPSACK_TEST_FILE_PATTERN is defined' do
+      stub_env('KNAPSACK_TEST_FILE_PATTERN', '/a/**/pattern')
+
+      expect(described_class.knapsack?).to be_truthy
+    end
+
+    it 'returns false if neither KNAPSACK_GENERATE_REPORT nor KNAPSACK_REPORT_PATH nor KNAPSACK_TEST_FILE_PATTERN are defined' do
+      expect(described_class.knapsack?).to be_falsey
+    end
+  end
+
   describe '.require_github_access_token!' do
     it 'raises ArgumentError if GITHUB_ACCESS_TOKEN is not defined' do
       stub_env('GITHUB_ACCESS_TOKEN', nil)