[Android] Sets up a coverage system for java using EMMA

build/android/buildbot/bb_device_steps.py

Index: build/android/buildbot/bb_device_steps.py
diff --git a/build/android/buildbot/bb_device_steps.py b/build/android/buildbot/bb_device_steps.py
index 8bc537f0b893476dea35311ff731c0322503c80c..4a9fd7d7db6ff3c43a34421b73a4641a850d28db 100755
--- a/build/android/buildbot/bb_device_steps.py
+++ b/build/android/buildbot/bb_device_steps.py
@@ -26,6 +26,7 @@ import errors
 
 CHROME_SRC = constants.DIR_SOURCE_ROOT
 LOGCAT_DIR = os.path.join(CHROME_SRC, 'out', 'logcat')
+COVERAGE_DIR = os.path.join(CHROME_SRC, 'out', 'coverage')
 
 # Describes an instrumation test suite:
 #   test: Name of test we're running.
@@ -37,26 +38,28 @@ LOGCAT_DIR = os.path.join(CHROME_SRC, 'out', 'logcat')
 #   annotation: Annotation of the tests to include.
 #   exclude_annotation: The annotation of the tests to exclude.
 I_TEST = collections.namedtuple('InstrumentationTest', [
-    'name', 'apk', 'apk_package', 'test_apk', 'test_data', 'host_driven_root',
-    'annotation', 'exclude_annotation', 'extra_flags'])
+    'name', 'apk', 'apk_package', 'test_apk', 'test_data', 'coverage',
+    'host_driven_root', 'annotation', 'exclude_annotation', 'extra_flags'])
 
-def I(name, apk, apk_package, test_apk, test_data, host_driven_root=None,
-      annotation=None, exclude_annotation=None, extra_flags=None):
-  return I_TEST(name, apk, apk_package, test_apk, test_data, host_driven_root,
-                annotation, exclude_annotation, extra_flags)
+def I(name, apk, apk_package, test_apk, test_data, coverage=False,
+      host_driven_root=None, annotation=None, exclude_annotation=None,
+      extra_flags=None):
+  return I_TEST(name, apk, apk_package, test_apk, test_data, coverage,
+                host_driven_root, annotation, exclude_annotation, extra_flags)
 
 INSTRUMENTATION_TESTS = dict((suite.name, suite) for suite in [
     I('ContentShell',
       'ContentShell.apk',
       'org.chromium.content_shell_apk',
       'ContentShellTest',
-      'content:content/test/data/android/device_files'),
+      'content:content/test/data/android/device_files',
+      coverage=True),
     I('ChromiumTestShell',
       'ChromiumTestShell.apk',
       'org.chromium.chrome.testshell',
       'ChromiumTestShellTest',
       'chrome:chrome/test/data/android/device_files',
-      constants.CHROMIUM_TEST_SHELL_HOST_DRIVEN_DIR),
+      host_driven_root=constants.CHROMIUM_TEST_SHELL_HOST_DRIVEN_DIR),
     I('AndroidWebView',
       'AndroidWebView.apk',
       'org.chromium.android_webview.shell',
@@ -164,6 +167,8 @@ def RunInstrumentationSuite(options, test, flunk_on_failure=True,
   if options.flakiness_server:
     args.append('--flakiness-dashboard-server=%s' %
                 options.flakiness_server)
+  if options.coverage and test.coverage:
+    args.append('--coverage-dir=%s' % COVERAGE_DIR)
   if test.host_driven_root:
     args.append('--python_test_root=%s' % test.host_driven_root)
   if test.annotation:
@@ -271,6 +276,12 @@ def RunInstrumentationTests(options):
   for test in INSTRUMENTATION_TESTS.itervalues():
     RunInstrumentationSuite(options, test)
 
+  if options.coverage:
+    RunCmd(['build/android/generate_emma_html.py',
+            '--coverage-dir', COVERAGE_DIR,
+            '--metadata-dir', os.path.join('out', options.target),
+            '--output', os.path.join(COVERAGE_DIR, 'coverage.html')])
+
 
 def RunWebkitTests(options):
   RunTestSuites(options, ['webkit_unit_tests'])
@@ -347,6 +358,8 @@ def GetDeviceStepsOptParser():
                     help='Install an apk by name')
   parser.add_option('--reboot', action='store_true',
                     help='Reboot devices before running tests')
+  parser.add_option('--coverage', action='store_true',
+                    help='Run instrumentation tests with coverage.')
   parser.add_option(
       '--flakiness-server',
       help='The flakiness dashboard server to which the results should be '