From 7bcbe2f84d3677c46ec2fa157a941f4d8537ff8a Mon Sep 17 00:00:00 2001
From: Egor Tensin <egor@tensin.name>
Date: Wed, 14 Oct 2026 18:47:59 +0500
Subject: add README.md

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+test-harness
+============
+
+A simple bash-based harness for integration tests.
+
+Used in a bunch of projects of mine, for example:
+
+* [tag-release](https://github.com/egor-tensin/tag-release/tree/master/test)
+* [config-links](https://github.com/egor-tensin/config-links/tree/master/test)
+
+Usage
+-----
+
+Supposed to be added as a submodule like so:
+
+    > cd my/project/test
+    > git submodule add https://github.com/egor-tensin/test-harness.git runner
+
+This will add it as a submodule in `test/runner/` in your project's directory.
+
+Run tests using the main.sh script:
+
+    > ./test/runner/main.sh
+
+The script will discover all your tests in the parent directory, run them and
+print a short summary.
+
+API
+---
+
+### Test structure
+
+* All tests are stored in `tst-*.sh` files in the parent directory of the runner.
+* All tests are `source`d by a bash script, so they must be bash code too.
+* All tests should have the `test_run` function, which will be executed.
+
+### Global state
+
+* The runner sets the following global variables:
+    * `test_root_dir`: a temporary directory unique for each test.
+The test can do whatever it wants in it; it'll get deleted after test's
+completion.
+    * `tests_dir`: the root directory with all the tests.
+It can be used for relative paths.
+
+### Hooks
+
+* `test_run`: as mentioned above, this is the entry point for the test; do your
+testing here.
+* `test_cleanup`: optional; if present, it'll be run on test's completion.
+
+### Logging
+
+Some useful logging routines are provided for ease of use.
+
+* `log`: prefixes lines with the test file's name, prints to stderr.
+* `log_run`: `log`s the executable to be run along with its arguments in a
+shell-ready format.
+* `fail`: use this if your test assertion fails.
+* `fail_details`: explain what's wrong.
+
+### Failures
+
+You can indicate that a test is expected to fail by setting the
+`test_should_fail` variable to a non-empty string in the test file.
+If such test's `test_run` function exits with anything but 0 then, it will
+still count as successful test run.
+
+License
+-------
+
+Distributed under the MIT License.
+See [LICENSE.txt] for details.
+
+[LICENSE.txt]: LICENSE.txt
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