Add readme for tests (#554)

DEVELOPMENT.md

@@ -84,6 +84,10 @@ See `build.sh --help` for a full list of options and usage examples.
 
 In the end, the build results in `kn` binary in your current directory, which can be directly executed.
 
+**Testing:**
+
+Please follow the [guide](./test) here to test the `knative client`.
+
 **Notes:**
 
 - For building, Go `1.11.4` is required [due to a go mod issue](https://github.com/golang/go/issues/27925).

test/README.md

@@ -0,0 +1,66 @@
+# Test
+
+This directory contains e2e tests and testing docs:
+
+- Unit tests are in the code base alongside the code they test
+- e2e tests are in [`test/e2e/`](./e2e)
+
+## Running unit tests
+
+To run all unit tests:
+
+```bash
+$ hack/build.sh -t
+```
+
+_By default `go test` will not run [the e2e tests](#running-e2e-tests-locally),
+which need [`-tags=e2e`](#running-end-to-end-tests) to be enabled._
+
+## Running e2e tests locally
+
+To run [the e2e tests](./e2e) , you need to have a 
+
+1. [Running knative environment.](./../DEVELOPMENT.md#create-a-cluster)
+2. `kn` binary in the $PATH.
+3. Please Make sure that you are able to connect to the cluster by following the [guide here](./../docs#connecting-to-your-cluster)
+
+Before running the e2e tests please make sure you dont have any namespaces with the name starting with `kne2etests`
+
+Run all e2e tests:
+
+```bash
+$ test/e2e-tests-local.sh
+```
+
+### Running e2e tests selectively
+
+To run only serving specific e2e tests locally, use
+
+```bash
+E2E_TAGS="serving" test/e2e-tests-local.sh
+```
+
+To run only eventing specific e2e tests locally, use
+
+```bash
+E2E_TAGS="eventing" test/e2e-tests-local.sh
+```
+
+### Running a single test case
+
+To run one e2e test case, e.g. TestBasicWorkflow
+
+```bash
+go test -v -tags=e2e -count=1 ./e2e -run ^TestBasicWorkflow$
+```
+
+### Running tests in short mode
+
+Running tests in short mode excludes some large-scale E2E tests and saves
+time/resources required for running the test suite. To run the tests in short
+mode, use
+[the `-short` flag with `go test`](https://golang.org/cmd/go/#hdr-Testing_flags)
+
+```bash
+test/e2e-tests-local.sh -short
+```