Updates to Android.mk generation.

platform_tools/android/tests/utils.py

+#!/usr/bin/python
+
+# Copyright 2014 Google Inc.
+#
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+"""
+Common code for tests.
+"""
+import filecmp
+import os
+
+EXPECTATIONS_DIR = os.path.join(os.path.dirname(__file__), 'expectations')
+
+def compare_to_expectation(actual_name, expectation_name, assert_true,
+                           msg=None):
+  """Check that a generated file matches its expectation in EXPECTATIONS_DIR.
+
+  Assert that the generated file and expectation file are identical.
+
+  Args:
+      actual_name: Full path to the test file.
+      expectation_name: Basename of the expectations file within which
+          to compare. The file is expected to be in
+          platform_tools/android/tests/expectations.
+      assert_true: function for asserting a statement is True
+
+      Args:
+          condition: statement to check for True.
+          msg: message to print if the files are not equal.
+
+      msg: Message to pass to assert_true.
+  """
+  full_expectations_path = os.path.join(EXPECTATIONS_DIR, expectation_name)
+  assert_true(filecmp.cmp(actual_name, full_expectations_path), msg)