Makes googlemock throw a runtime_error instead of abort when a mock

method with no default value is invoked (if exceptions are enabled).

include/gmock/gmock-spec-builders.h

@@ -66,6 +66,10 @@
 #include <string>
 #include <vector>
 
+#if GTEST_HAS_EXCEPTIONS
+# include <stdexcept>  // NOLINT
+#endif
+
 #include "gmock/gmock-actions.h"
 #include "gmock/gmock-cardinalities.h"
 #include "gmock/gmock-matchers.h"
@@ -1425,10 +1429,12 @@ class FunctionMockerBase : public UntypedFunctionMockerBase {
     return NULL;
   }
 
-  // Performs the default action of this mock function on the given arguments
+  // Performs the default action of this mock function on the given
-  // and returns the result. Asserts with a helpful call descrption if there is
+  // arguments and returns the result. Asserts (or throws if
-  // no valid return value. This method doesn't depend on the mutable state of
+  // exceptions are enabled) with a helpful call descrption if there
-  // this object, and thus can be called concurrently without locking.
+  // is no valid return value. This method doesn't depend on the
+  // mutable state of this object, and thus can be called concurrently
+  // without locking.
   // L = *
   Result PerformDefaultAction(const ArgumentTuple& args,
                               const string& call_description) const {
@@ -1437,9 +1443,16 @@ class FunctionMockerBase : public UntypedFunctionMockerBase {
     if (spec != NULL) {
       return spec->GetAction().Perform(args);
     }
-    Assert(DefaultValue<Result>::Exists(), "", -1,
+    const string message = call_description +
-           call_description + "\n    The mock function has no default action "
+        "\n    The mock function has no default action "
-           "set, and its return type has no default value set.");
+        "set, and its return type has no default value set.";
+#if GTEST_HAS_EXCEPTIONS
+    if (!DefaultValue<Result>::Exists()) {
+      throw std::runtime_error(message);
+    }
+#else
+    Assert(DefaultValue<Result>::Exists(), "", -1, message);
+#endif
     return DefaultValue<Result>::Get();
   }
 

test/gmock-actions_test.cc

@@ -634,15 +634,19 @@ TEST(DoDefaultTest, ReturnsBuiltInDefaultValueByDefault) {
   EXPECT_EQ(0, mock.IntFunc(true));
 }
 
-// Tests that DoDefault() aborts the process when there is no built-in
+// Tests that DoDefault() throws (when exceptions are enabled) or aborts
-// default value for the return type.
+// the process when there is no built-in default value for the return type.
 TEST(DoDefaultDeathTest, DiesForUnknowType) {
   MockClass mock;
   EXPECT_CALL(mock, Foo())
       .WillRepeatedly(DoDefault());
+#if GTEST_HAS_EXCEPTIONS
+  EXPECT_ANY_THROW(mock.Foo());
+#else
   EXPECT_DEATH_IF_SUPPORTED({
     mock.Foo();
   }, "");
+#endif
 }
 
 // Tests that using DoDefault() inside a composite action leads to a

test/gmock-spec-builders_test.cc

@@ -1111,7 +1111,11 @@ TEST(UndefinedReturnValueTest, ReturnValueIsMandatory) {
   // TODO(wan@google.com): We should really verify the output message,
   // but we cannot yet due to that EXPECT_DEATH only captures stderr
   // while Google Mock logs to stdout.
+#if GTEST_HAS_EXCEPTIONS
+  EXPECT_ANY_THROW(a.ReturnResult(1));
+#else
   EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(1), "");
+#endif
 }
 
 // Tests that an excessive call (one whose arguments match the
@@ -1260,87 +1264,116 @@ TEST(SequenceTest, AnyOrderIsOkByDefault) {
 
 // Tests that the calls must be in strict order when a complete order
 // is specified.
-TEST(SequenceTest, CallsMustBeInStrictOrderWhenSaidSo) {
+TEST(SequenceTest, CallsMustBeInStrictOrderWhenSaidSo1) {
   MockA a;
+  ON_CALL(a, ReturnResult(_))
+      .WillByDefault(Return(Result()));
+
   Sequence s;
-
   EXPECT_CALL(a, ReturnResult(1))
-      .InSequence(s)
+      .InSequence(s);
-      .WillOnce(Return(Result()));
-
   EXPECT_CALL(a, ReturnResult(2))
-      .InSequence(s)
+      .InSequence(s);
-      .WillOnce(Return(Result()));
-
   EXPECT_CALL(a, ReturnResult(3))
-      .InSequence(s)
+      .InSequence(s);
-      .WillOnce(Return(Result()));
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(1);
-    a.ReturnResult(3);
-    a.ReturnResult(2);
-  }, "");
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(2);
-    a.ReturnResult(1);
-    a.ReturnResult(3);
-  }, "");
 
   a.ReturnResult(1);
+
+  // May only be called after a.ReturnResult(2).
+  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
+
   a.ReturnResult(2);
   a.ReturnResult(3);
 }
 
-// Tests specifying a DAG using multiple sequences.
+// Tests that the calls must be in strict order when a complete order
-TEST(SequenceTest, CallsMustConformToSpecifiedDag) {
+// is specified.
+TEST(SequenceTest, CallsMustBeInStrictOrderWhenSaidSo2) {
   MockA a;
-  MockB b;
+  ON_CALL(a, ReturnResult(_))
-  Sequence x, y;
+      .WillByDefault(Return(Result()));
 
+  Sequence s;
   EXPECT_CALL(a, ReturnResult(1))
-      .InSequence(x)
+      .InSequence(s);
-      .WillOnce(Return(Result()));
-
-  EXPECT_CALL(b, DoB())
-      .Times(2)
-      .InSequence(y);
-
   EXPECT_CALL(a, ReturnResult(2))
-      .InSequence(x, y)
+      .InSequence(s);
-      .WillRepeatedly(Return(Result()));
 
-  EXPECT_CALL(a, ReturnResult(3))
+  // May only be called after a.ReturnResult(1).
-      .InSequence(x)
+  EXPECT_NONFATAL_FAILURE(a.ReturnResult(2), "Unexpected mock function call");
-      .WillOnce(Return(Result()));
 
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(1);
-    b.DoB();
-    a.ReturnResult(2);
-  }, "");
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(2);
-  }, "");
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(3);
-  }, "");
-
-  EXPECT_DEATH_IF_SUPPORTED({
-    a.ReturnResult(1);
-    b.DoB();
-    b.DoB();
-    a.ReturnResult(3);
-    a.ReturnResult(2);
-  }, "");
-
-  b.DoB();
   a.ReturnResult(1);
-  b.DoB();
+  a.ReturnResult(2);
-  a.ReturnResult(3);
+}
+
+// Tests specifying a DAG using multiple sequences.
+class PartialOrderTest : public testing::Test {
+ protected:
+  PartialOrderTest() {
+    ON_CALL(a_, ReturnResult(_))
+        .WillByDefault(Return(Result()));
+
+    // Specifies this partial ordering:
+    //
+    // a.ReturnResult(1) ==>
+    //                       a.ReturnResult(2) * n  ==>  a.ReturnResult(3)
+    // b.DoB() * 2       ==>
+    Sequence x, y;
+    EXPECT_CALL(a_, ReturnResult(1))
+        .InSequence(x);
+    EXPECT_CALL(b_, DoB())
+        .Times(2)
+        .InSequence(y);
+    EXPECT_CALL(a_, ReturnResult(2))
+        .Times(AnyNumber())
+        .InSequence(x, y);
+    EXPECT_CALL(a_, ReturnResult(3))
+        .InSequence(x);
+  }
+
+  MockA a_;
+  MockB b_;
+};
+
+TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag1) {
+  a_.ReturnResult(1);
+  b_.DoB();
+
+  // May only be called after the second DoB().
+  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
+
+  b_.DoB();
+  a_.ReturnResult(3);
+}
+
+TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag2) {
+  // May only be called after ReturnResult(1).
+  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
+
+  a_.ReturnResult(1);
+  b_.DoB();
+  b_.DoB();
+  a_.ReturnResult(3);
+}
+
+TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag3) {
+  // May only be called last.
+  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(3), "Unexpected mock function call");
+
+  a_.ReturnResult(1);
+  b_.DoB();
+  b_.DoB();
+  a_.ReturnResult(3);
+}
+
+TEST_F(PartialOrderTest, CallsMustConformToSpecifiedDag4) {
+  a_.ReturnResult(1);
+  b_.DoB();
+  b_.DoB();
+  a_.ReturnResult(3);
+
+  // May only be called before ReturnResult(3).
+  EXPECT_NONFATAL_FAILURE(a_.ReturnResult(2), "Unexpected mock function call");
 }
 
 TEST(SequenceTest, Retirement) {
@@ -1530,71 +1563,112 @@ TEST(AfterTest, SucceedsWhenTotalOrderIsSatisfied) {
   a.DoA(2);
 }
 
-// Calls must be in strict order when specified so.
+// Calls must be in strict order when specified so using .After().
-TEST(AfterDeathTest, CallsMustBeInStrictOrderWhenSpecifiedSo) {
+TEST(AfterTest, CallsMustBeInStrictOrderWhenSpecifiedSo1) {
   MockA a;
   MockB b;
+
+  // Define ordering:
+  //   a.DoA(1) ==> b.DoB() ==> a.DoA(2)
+  Expectation e1 = EXPECT_CALL(a, DoA(1));
+  Expectation e2 = EXPECT_CALL(b, DoB())
+      .After(e1);
+  EXPECT_CALL(a, DoA(2))
+      .After(e2);
+
+  a.DoA(1);
+
+  // May only be called after DoB().
+  EXPECT_NONFATAL_FAILURE(a.DoA(2), "Unexpected mock function call");
+
+  b.DoB();
+  a.DoA(2);
+}
+
+// Calls must be in strict order when specified so using .After().
+TEST(AfterTest, CallsMustBeInStrictOrderWhenSpecifiedSo2) {
+  MockA a;
+  MockB b;
+
+  // Define ordering:
+  //   a.DoA(1) ==> b.DoB() * 2 ==> a.DoA(2)
   Expectation e1 = EXPECT_CALL(a, DoA(1));
   Expectation e2 = EXPECT_CALL(b, DoB())
       .Times(2)
       .After(e1);
-  EXPECT_CALL(a, ReturnResult(2))
+  EXPECT_CALL(a, DoA(2))
-      .After(e2)
+      .After(e2);
-      .WillOnce(Return(Result()));
 
   a.DoA(1);
-  // If a call to ReturnResult() violates the specified order, no
+  b.DoB();
-  // matching expectation will be found, and thus the default action
+
-  // will be done.  Since the return type of ReturnResult() is not a
+  // May only be called after the second DoB().
-  // built-in type, gmock won't know what to return and will thus
+  EXPECT_NONFATAL_FAILURE(a.DoA(2), "Unexpected mock function call");
-  // abort the program.  Therefore a death test can tell us whether
-  // gmock catches the order violation correctly.
-  //
-  // gtest and gmock print messages to stdout, which isn't captured by
-  // death tests.  Therefore we have to match with an empty regular
-  // expression in all the EXPECT_DEATH()s.
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(2), "");
 
   b.DoB();
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(2), "");
+  a.DoA(2);
-
-  b.DoB();
-  a.ReturnResult(2);
 }
 
 // Calls must satisfy the partial order when specified so.
-TEST(AfterDeathTest, CallsMustSatisfyPartialOrderWhenSpecifiedSo) {
+TEST(AfterTest, CallsMustSatisfyPartialOrderWhenSpecifiedSo) {
   MockA a;
+  ON_CALL(a, ReturnResult(_))
+      .WillByDefault(Return(Result()));
+
+  // Define ordering:
+  //   a.DoA(1) ==>
+  //   a.DoA(2) ==> a.ReturnResult(3)
   Expectation e = EXPECT_CALL(a, DoA(1));
   const ExpectationSet es = EXPECT_CALL(a, DoA(2));
   EXPECT_CALL(a, ReturnResult(3))
-      .After(e, es)
+      .After(e, es);
-      .WillOnce(Return(Result()));
 
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(3), "");
+  // May only be called last.
+  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
 
   a.DoA(2);
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(3), "");
-
   a.DoA(1);
   a.ReturnResult(3);
 }
 
+// Calls must satisfy the partial order when specified so.
+TEST(AfterTest, CallsMustSatisfyPartialOrderWhenSpecifiedSo2) {
+  MockA a;
+
+  // Define ordering:
+  //   a.DoA(1) ==>
+  //   a.DoA(2) ==> a.DoA(3)
+  Expectation e = EXPECT_CALL(a, DoA(1));
+  const ExpectationSet es = EXPECT_CALL(a, DoA(2));
+  EXPECT_CALL(a, DoA(3))
+      .After(e, es);
+
+  a.DoA(2);
+
+  // May only be called last.
+  EXPECT_NONFATAL_FAILURE(a.DoA(3), "Unexpected mock function call");
+
+  a.DoA(1);
+  a.DoA(3);
+}
+
 // .After() can be combined with .InSequence().
-TEST(AfterDeathTest, CanBeUsedWithInSequence) {
+TEST(AfterTest, CanBeUsedWithInSequence) {
   MockA a;
   Sequence s;
   Expectation e = EXPECT_CALL(a, DoA(1));
   EXPECT_CALL(a, DoA(2)).InSequence(s);
-  EXPECT_CALL(a, ReturnResult(3))
+  EXPECT_CALL(a, DoA(3))
-      .InSequence(s).After(e)
+      .InSequence(s)
-      .WillOnce(Return(Result()));
+      .After(e);
 
   a.DoA(1);
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(3), "");
+
+  // May only be after DoA(2).
+  EXPECT_NONFATAL_FAILURE(a.DoA(3), "Unexpected mock function call");
 
   a.DoA(2);
-  a.ReturnResult(3);
+  a.DoA(3);
 }
 
 // .After() can be called multiple times.
@@ -1636,17 +1710,24 @@ TEST(AfterTest, AcceptsUpToFiveArguments) {
 // .After() allows input to contain duplicated Expectations.
 TEST(AfterTest, AcceptsDuplicatedInput) {
   MockA a;
+  ON_CALL(a, ReturnResult(_))
+      .WillByDefault(Return(Result()));
+
+  // Define ordering:
+  //   DoA(1) ==>
+  //   DoA(2) ==> ReturnResult(3)
   Expectation e1 = EXPECT_CALL(a, DoA(1));
   Expectation e2 = EXPECT_CALL(a, DoA(2));
   ExpectationSet es;
   es += e1;
   es += e2;
   EXPECT_CALL(a, ReturnResult(3))
-      .After(e1, e2, es, e1)
+      .After(e1, e2, es, e1);
-      .WillOnce(Return(Result()));
 
   a.DoA(1);
-  EXPECT_DEATH_IF_SUPPORTED(a.ReturnResult(3), "");
+
+  // May only be after DoA(2).
+  EXPECT_NONFATAL_FAILURE(a.ReturnResult(3), "Unexpected mock function call");
 
   a.DoA(2);
   a.ReturnResult(3);

test/gmock_ex_test.cc

@@ -0,0 +1,78 @@
+// Copyright 2013, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Author: wan@google.com (Zhanyong Wan)
+
+// Tests Google Mock's functionality that depends on exceptions.
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+
+namespace {
+
+using testing::HasSubstr;
+using testing::internal::GoogleTestFailureException;
+
+// A user-defined class.
+class Something {};
+
+class MockFoo {
+ public:
+  // A mock method that returns a user-defined type.  Google Mock
+  // doesn't know what the default value for this type is.
+  MOCK_METHOD0(GetSomething, Something());
+};
+
+#if GTEST_HAS_EXCEPTIONS
+
+TEST(DefaultValueTest, ThrowsRuntimeErrorWhenNoDefaultValue) {
+  MockFoo mock;
+  try {
+    // No expectation is set on this method, so Google Mock must
+    // return the default value.  However, since Google Mock knows
+    // nothing about the return type, it doesn't know what to return,
+    // and has to throw (when exceptions are enabled) or abort
+    // (otherwise).
+    mock.GetSomething();
+    FAIL() << "GetSomething()'s return type has no default value, "
+           << "so Google Mock should have thrown.";
+  } catch (const GoogleTestFailureException& /* unused */) {
+    FAIL() << "Google Test does not try to catch an exception of type "
+           << "GoogleTestFailureException, which is used for reporting "
+           << "a failure to other testing frameworks.  Google Mock should "
+           << "not throw a GoogleTestFailureException as it will kill the "
+           << "entire test program instead of just the current TEST.";
+  } catch (const std::exception& ex) {
+    EXPECT_THAT(ex.what(), HasSubstr("has no default value"));
+  }
+}
+
+#endif
+
+}  // unnamed namespace