Add unittest framework + tests for wrapper scripts
This commit adds a framework for running unittests on tempest to
verify that tempest works as expect. The first tests added are to
verify the response codes of the test runner wrapper scripts we use
on jenkins jobs.
Change-Id: If8e91238054593999e7b5bc34da499bd0ac02311
diff --git a/tempest/tests/README.rst b/tempest/tests/README.rst
new file mode 100644
index 0000000..4098686
--- /dev/null
+++ b/tempest/tests/README.rst
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+Tempest Guide to Unit tests
+===========================
+
+What are these tests?
+---------------------
+
+Unit tests are the self checks for Tempest. They provide functional
+verification and regression checking for the internal components of tempest.
+They should be used to just verify that the individual pieces of tempest are
+working as expected. They should not require an external service to be running
+and should be able to run solely from the tempest tree.
+
+Why are these tests in tempest?
+-------------------------------
+These tests exist to make sure that the mechanisms that we use inside of
+tempest to are valid and remain functional. They are only here for self
+validation of tempest.
+
+
+Scope of these tests
+--------------------
+Unit tests should not require an external service to be running or any extra
+configuration to run. Any state that is required for a test should either be
+mocked out or created in a temporary test directory. (see test_wrappers.py for
+an example of using a temporary test directory)