Mojo: Add a "pytest" to mojob.sh that runs Python unit tests.

mojo/tools/mojob.sh

 #!/bin/bash
 # Copyright 2013 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This a simple script to make building/testing Mojo components easier (on
 # Linux).
 
 # TODO(vtl): Maybe make the test runner smart and not run unchanged test
 # binaries.
 # TODO(vtl) Maybe also provide a way to pass command-line arguments to the test
 # binaries.
 
 do_help() {
   cat << EOF
 Usage: $(basename "$0") [command|option ...]
 
 command should be one of:
   build - Build.
   test - Run unit tests (does not build).
-  perftest - Run Release and Debug perf tests (does not build).
+  perftest - Run perf tests (does not build).
+  pytest - Run Python unit tests.
   gyp - Run gyp for mojo (does not sync), with clang.
   sync - Sync using gclient (does not run gyp).
   show-bash-alias - Outputs an appropriate bash alias for mojob. In bash do:
       \$ eval \`mojo/tools/mojob.sh show-bash-alias\`
 
 option (which will only apply to following commands) should be one of:
   Build/test options (specified before build/test/perftest):
     --debug - Build/test in Debug mode.
     --release - Build/test in Release mode.
     --debug-and-release - Build/test in both Debug and Release modes (default).
@@ skipping 20 matching lines @@
   echo "Running unit tests in out/$1 ..."
   mojo/tools/test_runner.py mojo/tools/data/unittests "out/$1" \
       mojob_test_successes || exit 1
 }
 
 do_perftests() {
   echo "Running perf tests in out/$1 ..."
   "out/$1/mojo_public_system_perftests" || exit 1
 }
 
+do_pytests() {
+  echo "Running Python unit tests under mojo/public/tools/bindings/pylib ..."
+  python -m unittest \
+      discover -s mojo/public/tools/bindings/pylib -p "*_unittest.py"
+}
+
 do_gyp() {
   local gyp_defines="$(make_gyp_defines)"
   echo "Running gyp with GYP_DEFINES=$gyp_defines ..."
   GYP_DEFINES="$gyp_defines" build/gyp_chromium mojo/mojo.gyp || exit 1
 }
 
 do_sync() {
   # Note: sync only (with hooks, but no gyp-ing).
   GYP_CHROMIUM_NO_ACTION=1 gclient sync || exit 1
 }
@@ skipping 65 matching lines @@
       should_do_Release && do_build Release
       ;;
     test)
       should_do_Debug && do_unittests Debug
       should_do_Release && do_unittests Release
       ;;
     perftest)
       should_do_Debug && do_perftests Debug
       should_do_Release && do_perftests Release
       ;;
+    pytest)
+      do_pytests
+      ;;
     gyp)
       do_gyp
       ;;
     sync)
       do_sync
       ;;
     show-bash-alias)
       # You want to type something like:
       #   alias mojob=\
       #       '"$(pwd | sed '"'"'s/\(.*\/src\).*/\1/'"'"')/mojo/tools/mojob.sh"'
@@ skipping 29 matching lines @@
       ;;
     --no-use-mojo)
       USE_MOJO=disabled
       ;;
     *)
       echo "Unknown command \"${arg}\". Try \"$(basename "$0") help\"."
       exit 1
       ;;
   esac
 done