os.Exit() doesn't execute defer-ed functions, OTOH we call panic()
in case of setup errors, which does run defer-ed functions. So move
the actual test setup and execution in a separate function which will
execute all defer-ed functions and return the exit code from the
test suite to TestMain.
The mock server used by unit tests is slightly different than the
running server, mostly related to package names that are hard-coded.
This adds a bool to testState that can be used in the tests to alter the
expected behavior. It should be used as little as possible.
Copy weldrcheck's utils.go into client, switch to using TestState struct
to hold global test data. Only build unit_test.go if integration has not
been selected.
This is in preparation to moving weldrcheck code into client *_test.go
files so that the test code can be shared and run against a mock server
during unit testing, or against a running WELDR API server during
integration testing.
