Suppose you have installed the API exactly as described in the installation instructions. When you try to run the tests, you might find that many tests fail with messages like:
IOError: Test file xxxxxxx does not exist in /mypath/tests/testdata or /mypath/doc/example_files
Sorry, this is because the installation instructions are unclear. To run the tests, you need to extract the full archive, not just the 'tests' directory out of the archive.
We will update future versions of the documentation.