Adds method ordinal off-by-one error detection testing to ValidationTest.

mojo/public/cpp/bindings/tests/validation_unittest.cc

Index: mojo/public/cpp/bindings/tests/validation_unittest.cc
diff --git a/mojo/public/cpp/bindings/tests/validation_unittest.cc b/mojo/public/cpp/bindings/tests/validation_unittest.cc
index c15ff0291a7b74d3df324f98c6ad333d626bdc10..b56580f1fbd185a152772b69a6b2d965cef97954 100644
--- a/mojo/public/cpp/bindings/tests/validation_unittest.cc
+++ b/mojo/public/cpp/bindings/tests/validation_unittest.cc
@@ -371,6 +371,18 @@ TEST_F(ValidationTest, Conformance) {
   RunValidationTests("conformance_", validators.GetHead());
 }
 
+// This test is similar to Conformance test but its goal is specifically
+// do bounds-check testing of message validation. For example we test the
+// detection of off-by-one errors in method ordinals.
+TEST_F(ValidationTest, BoundsCheck) {
+  DummyMessageReceiver dummy_receiver;
+  mojo::internal::FilterChain validators(&dummy_receiver);
+  validators.Append<mojo::internal::MessageHeaderValidator>();
+  validators.Append<BoundsCheckTestInterface::RequestValidator_>();
+
+  RunValidationTests("boundscheck_", validators.GetHead());
+}
+
 // This test is similar to the Conformance test but for responses.
 TEST_F(ValidationTest, ResponseConformance) {
   DummyMessageReceiver dummy_receiver;
@@ -381,6 +393,16 @@ TEST_F(ValidationTest, ResponseConformance) {
   RunValidationTests("resp_conformance_", validators.GetHead());
 }
 
+// This test is similar to the BoundsCheck test but for responses.
+TEST_F(ValidationTest, ResponseBoundsCheck) {
+  DummyMessageReceiver dummy_receiver;
+  mojo::internal::FilterChain validators(&dummy_receiver);
+  validators.Append<mojo::internal::MessageHeaderValidator>();
+  validators.Append<BoundsCheckTestInterface::ResponseValidator_>();
+
+  RunValidationTests("resp_boundscheck_", validators.GetHead());
+}
+
 // Test that InterfacePtr<X> applies the correct validators and they don't
 // conflict with each other:
 //   - MessageHeaderValidator