Update the instructions on running one gtest on the build host.
The existing instructions don't work when the test binary is not built
yet.
Bug: 147820692
Change-Id: I91a3eb376b9b8142a380d2e1b26fd7a8b86cf7df
Test: N/A
diff --git a/test/README.md b/test/README.md
index da9a1f1..dc9e9b7 100644
--- a/test/README.md
+++ b/test/README.md
@@ -201,6 +201,17 @@
## Running one gtest on the build host
```sh
+$ m test-art-host-gtest-art_runtime_tests
+```
+
+Note: Although this is a build command, it actually builds the test with
+dependencies and runs the test.
+
+If you want to run the test with more options, use the following commands
+instead. Note that you need to run the test with the command above at least once
+before you run the commands below.
+
+```sh
$ find out/host/ -type f -name art_runtime_tests # Find the path of the test.
$ out/host/linux-x86/nativetest/art_runtime_tests/art_runtime_tests
```