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+This directory contains tests that run CMake to configure a project
+but do not actually build anything.  To add a test:
+
+1. Add a subdirectory named for the test, say ``<Test>/``.
+
+2. In ``./CMakeLists.txt`` call ``add_RunCMake_test`` and pass the
+   test directory name ``<Test>``.
+
+3. Create script ``<Test>/RunCMakeTest.cmake`` in the directory containing::
+
+    include(RunCMake)
+    run_cmake(SubTest1)
+    ...
+    run_cmake(SubTestN)
+
+   where ``SubTest1`` through ``SubTestN`` are sub-test names each
+   corresponding to an independent CMake run and project configuration.
+
+4. Create file ``<Test>/CMakeLists.txt`` in the directory containing::
+
+    cmake_minimum_required(...)
+    project(${RunCMake_TEST} NONE) # or languages needed
+    include(${RunCMake_TEST}.cmake)
+
+   where ``${RunCMake_TEST}`` is literal.  A value for ``RunCMake_TEST``
+   will be passed to CMake by the ``run_cmake`` macro when running each
+   sub-test.
+
+5. Create a ``<Test>/<SubTest>.cmake`` file for each sub-test named
+   above containing the actual test code.  Optionally create files
+   containing expected test results:
+
+   ``<SubTest>-result.txt``
+    Process result expected if not "0"
+   ``<SubTest>-stdout.txt``
+    Regex matching expected stdout content
+   ``<SubTest>-stderr.txt``
+    Regex matching expected stderr content
+   ``<SubTest>-check.cmake``
+    Custom result check.
+
+   Note that trailing newlines will be stripped from actual and expected
+   test output before matching against the stdout and stderr expressions.
+   The code in ``<SubTest>-check.cmake`` may use variables
+
+   ``RunCMake_TEST_SOURCE_DIR``
+    Top of test source tree
+   ``RunCMake_TEST_BINARY_DIR``
+    Top of test binary tree
+
+   and an failure must store a message in ``RunCMake_TEST_FAILED``.