Run App tests on Android.

mojo/tools/mopy/config.py

Index: mojo/tools/mopy/config.py
diff --git a/mojo/tools/mopy/config.py b/mojo/tools/mopy/config.py
index 7a3ce194847b3778969bf5cf9e63b5002046e9ec..efca6ad7c211441cf0eaf821708545de58359bd6 100644
--- a/mojo/tools/mopy/config.py
+++ b/mojo/tools/mopy/config.py
@@ -119,3 +119,25 @@ class Config(object):
   def test_types(self):
     """List of test types to run."""
     return self.values.get("test_types", [Config.TEST_TYPE_DEFAULT])
+
+  # Utility methods ------------------------------------------------------------
+
+  def match_target_os(self, selector):
+    """Returns whether the current config matches the target os selector.
+
+    |selector| is a list of strings. Each string is either:
+    *          : matches everything.
+    target_os  : matches the given target os.
+    !*         : rejects everything
+    !target_os : rejects the given target os.
+
+    The last matching selector is considered. If no selector match, the config
+    matches.
+    """
+    for match in reversed(selector):
+      invert = match[0] == "!"
+      if invert:
+        match = match[1:]
+      if match == "*" or self.target_os == match:
+        return not invert
+    return True