- Installed mock, required by the tests.

- Exits the build shell script if any of the commands fails.

PiperOrigin-RevId: 353310695
Change-Id: I7e4df5de32ec4b3c8ca03ab6f5cf7a03f8f61856

Author: joejoevictor

.github/scripts/build.sh

@@ -14,12 +14,16 @@
 
 #!/usr/bin/env bash
 
+# Exit when any command fails.
+set -e
+
 PYTHON_VERSION=${PYTHON_VERSION:-2.7}
 
 pip install --upgrade setuptools pip
 pip install --upgrade pylint pytest pytest-pylint pytest-runner
 pip install termcolor
 pip install hypothesis python-Levenshtein
+pip install mock
 python setup.py develop
 python -m pytest  # Run the tests without IPython.
 pip install ipython