TST: Added unittest that runs all examples.

tests/test_examples.py

@@ -0,0 +1,54 @@
+#
+# Copyright 2013 Quantopian, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This code is based on a unittest written by John Salvatier:
+# https://github.com/pymc-devs/pymc/blob/pymc3/tests/test_examples.py
+
+# Disable plotting
+#
+import matplotlib
+matplotlib.use('Agg')
+
+from os import path
+import os
+import fnmatch
+import imp
+
+
+def test_examples():
+    os.chdir(example_dir())
+    for fname in all_matching_files('.', '*.py'):
+        yield check_example, fname
+
+
+def all_matching_files(d, pattern):
+    def addfiles(fls, dir, nfiles):
+        nfiles = fnmatch.filter(nfiles, pattern)
+        nfiles = [path.join(dir, f) for f in nfiles]
+        fls.extend(nfiles)
+
+    files = []
+    path.walk(d, addfiles, files)
+    return files
+
+
+def example_dir():
+    import zipline
+    d = path.dirname(zipline.__file__)
+    return path.join(path.abspath(d), 'examples/')
+
+
+def check_example(p):
+    imp.load_source('__main__', path.basename(p))