E2E fzf Test Selection Autocompletion (#3313)

e2e/README.md

@@ -80,6 +80,8 @@ make e2e-test entrypoint=TestInterchainAccountsTestSuite test=TestMsgSubmitTx_Su
 
 If `jq` is installed, you only need to specify the `test`.
 
+If `fzf` is also installed, you only need to run `make e2e-test` and you will be prompted with interactive test selection.
+
 ```sh
 make e2e-test test=TestMsgSubmitTx_SuccessfulTransfer
 ```

e2e/scripts/run-e2e.sh

@@ -5,6 +5,26 @@ set -eo pipefail
 TEST="${1}"
 ENTRY_POINT="${2:-}"
 
+# _get_test returns the test that should be used in the e2e test. If an argument is provided, that argument
+# is returned. Otherwise, fzf is used to interactively choose from all available tests.
+function _get_test(){
+    if [ -n "$1" ]; then
+        echo "$1"
+        return
+    # if fzf and jq are installed, we can use them to provide an interactive mechanism to select from all available tests.
+    elif command -v fzf > /dev/null && command -v jq > /dev/null; then
+        cd ..
+        go run -mod=readonly cmd/build_test_matrix/main.go | jq  -r '.include[] | .test' | fzf
+        cd - > /dev/null
+    else
+        echo "TEST was not provided and both fzf and jq are not present. Unable to determine which test should be used."
+        exit 1
+    fi
+}
+
+# if test is set, that is used directly, otherwise the test can be interactively provided if fzf is installed.
+TEST="$(_get_test ${TEST})"
+
 # if jq is installed, we can automatically determine the test entrypoint.
 if command -v jq > /dev/null; then
    cd ..