Test Redis TTL parsing

Author: Doug Edey

ruby/lib/ci/queue/configuration.rb

@@ -18,7 +18,7 @@ def from_env(env)
             seed: env['CIRCLE_SHA1'] || env['BUILDKITE_COMMIT'] || env['TRAVIS_COMMIT'] || env['HEROKU_TEST_RUN_COMMIT_VERSION'] || env['SEMAPHORE_GIT_SHA'],
             flaky_tests: load_flaky_tests(env['CI_QUEUE_FLAKY_TESTS']),
             statsd_endpoint: env['CI_QUEUE_STATSD_ADDR'],
-            redis_ttl: env['CI_QUEUE_REDIS_TTL'],
+            redis_ttl: env['CI_QUEUE_REDIS_TTL']&.to_i ||  8 * 60 * 60,
           )
         end
 

ruby/test/ci/queue/configuration_test.rb

@@ -65,6 +65,18 @@ def test_namespace
       assert_equal 'browser:9e08ef3c-d6e6-4a86-91dd-577ce5205b8e', config.build_id
     end
 
+    def test_redis_ttl_defaults
+      config = Configuration.new
+      assert_equal(28_800, config.redis_ttl)
+    end
+
+    def test_redis_ttl_from_env
+      config = Configuration.from_env(
+        "CI_QUEUE_REDIS_TTL" => "14400"
+      )
+      assert_equal(14_400, config.redis_ttl)
+    end
+
     def test_parses_file_correctly
       Tempfile.open('flaky_test_file') do |file|
         file.write(SharedTestCases::TEST_NAMES.join("\n") + "\n")