add test for env vars being passed to docker

Author: Nicole Lopez

tests/command.bats

@@ -33,6 +33,34 @@ load "$BATS_PATH/load.bash"
   unstub docker
 }
 
+@test "can pass through optional params" {
+  export BUILDKITE_PLUGIN_JUNIT_ANNOTATE_ARTIFACTS="junits/*.xml"
+  export BUILDKITE_PLUGIN_JUNIT_ANNOTATE_JOB_UUID_FILE_PATTERN="custom_(*)_pattern.xml"
+  export BUILDKITE_PLUGIN_JUNIT_ANNOTATE_FAILURE_OUTPUT="file"
+
+  artifacts_tmp="tests/tmp/$PWD/junit-artifacts"
+  annotation_tmp="tests/tmp/$PWD/junit-annotation"
+
+  stub mktemp \
+    "-d junit-annotate-plugin-artifacts-tmp.XXXXXXXXXX : mkdir -p $artifacts_tmp; echo $artifacts_tmp" \
+    "-d junit-annotate-plugin-annotation-tmp.XXXXXXXXXX : mkdir -p $annotation_tmp; echo $annotation_tmp"
+
+  stub buildkite-agent "artifact download junits/*.xml /plugin/tests/tmp//plugin/junit-artifacts : echo Downloaded artifacts" \
+                       "annotate --context junit --style error : echo Annotation added"
+
+  stub docker "--log-level error run --rm --volume /plugin/tests/tmp//plugin/junit-artifacts:/junits --volume /plugin/hooks/../ruby:/src --env "BUILDKITE_PLUGIN_JUNIT_ANNOTATE_JOB_UUID_FILE_PATTERN=${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_JOB_UUID_FILE_PATTERN:-}" --env "BUILDKITE_PLUGIN_JUNIT_ANNOTATE_FAILURE_OUTPUT=${BUILDKITE_PLUGIN_JUNIT_ANNOTATE_FAILURE_OUTPUT:-}" ruby:2.5-alpine /src/bin/annotate /junits : echo '<details>Failure</details>'"
+
+  run "$PWD/hooks/command"
+
+  assert_success
+
+  assert_output --partial "Annotation added"
+
+  unstub mktemp
+  unstub buildkite-agent
+  unstub docker
+}
+
 @test "doesn't create annotation unless there's failures" {
   export BUILDKITE_PLUGIN_JUNIT_ANNOTATE_ARTIFACTS="junits/*.xml"