chore: allow devs to run locally a subset of e2e tests

docs/developer-guide/development-cycle.md

@@ -72,7 +72,10 @@ The final step is running the End-to-End testsuite, which ensures that your Kube
 * First, start the End-to-End server: `make start-e2e` or `make start-e2e-local`. This will spawn a number of processes and services on your system.
 * When all components have started, run `make test-e2e` or `make test-e2e-local` to run the end-to-end tests against your local services.
 
-To run a single test with a local toolchain, you can use `TEST_FLAGS="-run TestName" make test-e2e-local`.
+Below you can find a few examples of how to run specific tests.
+- To run a single test with a local toolchain, you can use `TEST_FLAGS="-run TestName" make test-e2e-local`.
+- To run a specific package, you can use `make TEST_MODULE=./test/e2e/<TEST_FILE>.go test-e2e-local`
+- Finally, you can also try `make TEST_FLAGS="-run <TEST_METHOD_NAME_REGEXP>" test-e2e-local` if you want a more fine-grained control. 
 
 For more information about End-to-End tests, refer to the [End-to-End test documentation](test-e2e.md).
 

docs/developer-guide/test-e2e.md

@@ -55,6 +55,14 @@ Some effort has been made to balance test isolation with speed. Tests are isolat
 * A namespace `argocd-e2e-ns-${id}`.
 * A primary name for the app `argocd-e2e-${id}`.
 
+## Run only a subset of tests
+
+Running all tests locally is a time-consuming process. To run only a subset of tests, you can set the `TEST_MODULE` environment variable. 
+For example, to run only the OCI tests, you can set the variable as follows: `make TEST_MODULE=./test/e2e/oci_test.go test-e2e-local` 
+
+If you want to get a more fine-grained control over which tests to run, you can also try `make TEST_FLAGS="-run <TEST_METHOD_NAME_REGEXP>" test-e2e-local`
+For individual tests you can run them using the IDE run test feature 
+
 ## Troubleshooting
 
 **Tests fails to delete `argocd-e2e-ns-*` namespaces.**

hack/test.sh

@@ -24,4 +24,4 @@ mkdir -p "$TEST_RESULTS"
 # shellcheck disable=SC2086
 GODEBUG="tarinsecurepath=0,zipinsecurepath=0" \
     gotestsum --rerun-fails-report=rerunreport.txt --junitfile="$TEST_RESULTS/junit.xml" --format=testname \
-    --rerun-fails="$RERUN_FAILS" --packages="$PACKAGES" -- -cover $TEST_FLAGS "$@"
+    --rerun-fails="$RERUN_FAILS" --packages="${TEST_MODULE:-$PACKAGES}" -- -cover $TEST_FLAGS "$@"