Adding documentation for tests

script/test_in_openshift/README.md

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+# Functional tests for Kompose on OpenShift
+
+## Introduction
+
+The functional tests for Kompose on OpenShift cluster leverages  `oc cluster up` to bring a single-cluster OpenShift instance. The test scripts
+are hosted under script/test_in_openshift.
+
+The directory structure is as below:
+
+```
+        script/test_in_openshift/
+        ├── compose-files
+        │   └── docker-compose-command.yml
+        ├── lib.sh
+        ├── run.sh
+        └── tests
+                ├── buildconfig.sh
+                ├── entrypoint-command.sh
+                ├── etherpad.sh
+                └── redis-replica-2.sh
+                └── ..
+```
+
+- [run.sh](/script/test_in_openshift/run.sh) is the master script which executes all the tests.
+
+- [lib.sh](/script/test_in_openshift/lib.sh) consists of helper functions for `kompose up` and `kompose down` checks.
+
+- [tests/](/script/test_in_openshift/tests) directory contains the test scripts.
+
+- [compose-files/](/script/test_in_openshift/compose-files/) directory contains the docker compose file used by the test scripts.
+
+- The scripts use [`oc cluster up`](https://github.com/openshift/origin/blob/master/docs/cluster_up_down.md) for setting up a single-machine OpenShift cluster. It exits if oc binaries are not installed.
+
+- Docker Compose examples are available under [examples/](/examples] or [/script/test/fixtures](/script/test/fixtures).
+
+## Running OpenShift tests
+
+### Deploy `oc cluster up`
+
+The scripts use [`oc cluster up`](https://github.com/openshift/origin/blob/master/docs/cluster_up_down.md) for setting up a single-machine OpenShift cluster. Installing oc binary is a pre-requisite for running these tests.
+
+Use `make test-openshift` to run the OpenShift tests.
+
+## Adding OpenShift tests
+
+* You can add the OpenShift tests by adding your script under [script/test_in_openshift/tests](/script/test_in_openshift/tests).