add test__benchmarks.py

greentest/test__benchmarks.py

+import sys
+import os
+import glob
+
+modules = set()
+
+for path in glob.glob('bench_*.py'):
+    modules.add(path)
+
+assert modules
+
+error = 0
+
+for path in modules:
+    print path
+    sys.stdout.flush()
+    res = os.system('%s %s all' % (sys.executable, path))
+    if res:
+        error = 1
+        print path, 'failed'
+    print '-----'
+
+if error:
+    sys.exit(1)
+