docs: Add Testing section

Signed-off-by: Qasim Sarfraz <qasimsarfraz@microsoft.com>

Author: mqasimsarfraz

README.md

@@ -123,6 +123,35 @@ roles e.g Contributor, you should have the above permissions. However, if you ar
 using [custom roles](https://learn.microsoft.com/en-us/azure/role-based-access-control/custom-roles-portal) for a
 service principal, you need to make sure that the permissions are granted.
 
+## Testing
+
+### integration tests
+
+The integration test needs an AKS cluster to run against. You can create one and use following command to run the integration test:
+
+```
+make integration-test
+```
+
+You will need to set `AZURE_RESOURCE_GROUP` and `AZURE_CLUSTER_NAME` environment variables to specify the AKS cluster to run against.
+
+### documentation tests
+
+The documentation tests are used to validate the documentation examples. You can run the documentation tests with the following command:
+
+```
+make documentation-test
+```
+
+or
+
+```
+DOCUMENTATION_TEST_FILES=README.md make documentation-test -o install
+```
+
+An INI file with all the required variables needs to be created to run the documentation tests. A sample INI file for [docs/run-command.md](docs/run-command.md)
+is available [here](docs/run-command.ini.sample).
+
 ## Contributing
 
 This project welcomes contributions and suggestions. Most contributions require