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-rw-r--r--doc/guides/writing-tests.md8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/guides/writing-tests.md b/doc/guides/writing-tests.md
index 4dbc8163d1..54123362d6 100644
--- a/doc/guides/writing-tests.md
+++ b/doc/guides/writing-tests.md
@@ -18,6 +18,13 @@ Add tests when:
- Fixing regressions and bugs.
- Expanding test coverage.
+## Test directory structure
+
+See [directory structure overview][] for outline of existing test & locations.
+When deciding on whether to expand an existing test file or create a new one,
+consider going through the files related to the subsystem.
+For example, look for `test-streams` when writing a test for `lib/streams.js`.
+
## Test structure
Let's analyze this basic test from the Node.js test suite:
@@ -380,3 +387,4 @@ will depend on what is being tested if this is required or not.
[all maintained branches]: https://github.com/nodejs/lts
[node.green]: http://node.green/
[test fixture]: https://github.com/google/googletest/blob/master/googletest/docs/Primer.md#test-fixtures-using-the-same-data-configuration-for-multiple-tests
+[directory structure overview]: https://github.com/nodejs/node/blob/master/test/README.md#test-directories