Implements printing parameters of failed parameterized tests (issue 71).

include/gtest/internal/gtest-param-util.h

@@ -44,6 +44,7 @@
 #include <gtest/internal/gtest-internal.h>
 #include <gtest/internal/gtest-linked_ptr.h>
 #include <gtest/internal/gtest-port.h>
+#include <gtest/gtest-printers.h>
 
 #if GTEST_HAS_PARAM_TEST
 
@@ -171,7 +172,7 @@ class ParamGenerator {
   iterator end() const { return iterator(impl_->End()); }
 
  private:
-  ::testing::internal::linked_ptr<const ParamGeneratorInterface<T> > impl_;
+  linked_ptr<const ParamGeneratorInterface<T> > impl_;
 };
 
 // Generates values from a range of two comparable values. Can be used to
@@ -504,12 +505,12 @@ class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
              param_it != generator.end(); ++param_it, ++i) {
           Message test_name_stream;
           test_name_stream << test_info->test_base_name.c_str() << "/" << i;
-          ::testing::internal::MakeAndRegisterTestInfo(
+          std::string comment = "GetParam() = " + PrintToString(*param_it);
+          MakeAndRegisterTestInfo(
               test_case_name_stream.GetString().c_str(),
               test_name_stream.GetString().c_str(),
               "",  // test_case_comment
-              "",  // comment; TODO(vladl@google.com): provide parameter value
-                   //                                  representation.
+              comment.c_str(),
               GetTestCaseTypeId(),
               TestCase::SetUpTestCase,
               TestCase::TearDownTestCase,

src/gtest.cc

@@ -2658,6 +2658,19 @@ void ColoredPrintf(GTestColor color, const char* fmt, ...) {
   va_end(args);
 }
 
+void PrintFullTestCommentIfPresent(const TestInfo& test_info) {
+  const char* const comment = test_info.comment();
+  const char* const test_case_comment = test_info.test_case_comment();
+
+  if (test_case_comment[0] != '\0' || comment[0] != '\0') {
+    printf(", where %s", test_case_comment);
+    if (test_case_comment[0] != '\0' && comment[0] != '\0') {
+      printf(" and ");
+    }
+    printf("%s", comment);
+  }
+}
+
 // This class implements the TestEventListener interface.
 //
 // Class PrettyUnitTestResultPrinter is copyable.
@@ -2748,11 +2761,7 @@ void PrettyUnitTestResultPrinter::OnTestCaseStart(const TestCase& test_case) {
 void PrettyUnitTestResultPrinter::OnTestStart(const TestInfo& test_info) {
   ColoredPrintf(COLOR_GREEN,  "[ RUN      ] ");
   PrintTestName(test_case_name_.c_str(), test_info.name());
-  if (test_info.comment()[0] == '\0') {
   printf("\n");
-  } else {
-    printf(", where %s\n", test_info.comment());
-  }
   fflush(stdout);
 }
 
@@ -2775,6 +2784,9 @@ void PrettyUnitTestResultPrinter::OnTestEnd(const TestInfo& test_info) {
     ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
   }
   PrintTestName(test_case_name_.c_str(), test_info.name());
+  if (test_info.result()->Failed())
+    PrintFullTestCommentIfPresent(test_info);
+
   if (GTEST_FLAG(print_time)) {
     printf(" (%s ms)\n", internal::StreamableToString(
            test_info.result()->elapsed_time()).c_str());
@@ -2823,15 +2835,8 @@ void PrettyUnitTestResultPrinter::PrintFailedTests(const UnitTest& unit_test) {
       }
       ColoredPrintf(COLOR_RED, "[  FAILED  ] ");
       printf("%s.%s", test_case.name(), test_info.name());
-      if (test_case.comment()[0] != '\0' ||
-          test_info.comment()[0] != '\0') {
-        printf(", where %s", test_case.comment());
-        if (test_case.comment()[0] != '\0' &&
-            test_info.comment()[0] != '\0') {
-          printf(" and ");
-        }
-      }
-      printf("%s\n", test_info.comment());
+      PrintFullTestCommentIfPresent(test_info);
+      printf("\n");
     }
   }
 }

test/gtest-param-test_test.cc

@@ -792,19 +792,50 @@ INSTANTIATE_TEST_CASE_P(FourElemSequence, SeparateInstanceTest, Range(1, 4));
 // sequence element used to instantiate the test.
 class NamingTest : public TestWithParam<int> {};
 
-TEST_P(NamingTest, TestsAreNamedAppropriately) {
+TEST_P(NamingTest, TestsAreNamedAndCommentedCorrectly) {
   const ::testing::TestInfo* const test_info =
      ::testing::UnitTest::GetInstance()->current_test_info();
 
   EXPECT_STREQ("ZeroToFiveSequence/NamingTest", test_info->test_case_name());
 
-  Message msg;
-  msg << "TestsAreNamedAppropriately/" << GetParam();
-  EXPECT_STREQ(msg.GetString().c_str(), test_info->name());
+  Message index_stream;
+  index_stream << "TestsAreNamedAndCommentedCorrectly/" << GetParam();
+  EXPECT_STREQ(index_stream.GetString().c_str(), test_info->name());
+
+  const ::std::string comment =
+      "GetParam() = " + ::testing::PrintToString(GetParam());
+  EXPECT_EQ(comment, test_info->comment());
 }
 
 INSTANTIATE_TEST_CASE_P(ZeroToFiveSequence, NamingTest, Range(0, 5));
 
+// Class that cannot be streamed into an ostream.  It needs to be copyable
+// (and, in case of MSVC, also assignable) in order to be a test parameter
+// type.  Its default copy constructor and assignment operator do exactly
+// what we need.
+class Unstreamable {
+ public:
+  explicit Unstreamable(int value) : value_(value) {}
+
+ private:
+  int value_;
+};
+
+class CommentTest : public TestWithParam<Unstreamable> {};
+
+TEST_P(CommentTest, TestsWithUnstreamableParamsCommentedCorrectly) {
+  const ::testing::TestInfo* const test_info =
+     ::testing::UnitTest::GetInstance()->current_test_info();
+
+  const ::std::string comment =
+      "GetParam() = " + ::testing::PrintToString(GetParam());
+  EXPECT_EQ(comment, test_info->comment());
+}
+
+INSTANTIATE_TEST_CASE_P(InstantiationWithComments,
+                        CommentTest,
+                        Values(Unstreamable(1)));
+
 #endif  // GTEST_HAS_PARAM_TEST
 
 TEST(CompileTest, CombineIsDefinedOnlyWhenGtestHasParamTestIsDefined) {

test/gtest_output_test.py

@@ -240,7 +240,7 @@ SUPPORTS_STACK_TRACES = False
 
 CAN_GENERATE_GOLDEN_FILE = (SUPPORTS_DEATH_TESTS and
                             SUPPORTS_TYPED_TESTS and
-                            SUPPORTS_THREADS)
+                            (SUPPORTS_THREADS or IS_WINDOWS))
 
 
 class GTestOutputTest(gtest_test_utils.TestCase):

test/gtest_output_test_.cc

@@ -87,6 +87,20 @@ TEST(PassingTest, PassingTest1) {
 TEST(PassingTest, PassingTest2) {
 }
 
+// Tests that parameters of failing parameterized tests are printed in the
+// failing test summary.
+class FailingParamTest : public testing::TestWithParam<int> {};
+
+TEST_P(FailingParamTest, Fails) {
+  EXPECT_EQ(1, GetParam());
+}
+
+// This generates a test which will fail. Google Test is expected to print
+// its parameter when it outputs the list of all failed tests.
+INSTANTIATE_TEST_CASE_P(PrintingFailingParams,
+                        FailingParamTest,
+                        testing::Values(2));
+
 // Tests catching a fatal failure in a subroutine.
 TEST(FatalFailureTest, FatalFailureInSubroutine) {
   printf("(expecting a failure that x should be 1)\n");

test/gtest_output_test_golden_lin.txt

@@ -7,7 +7,7 @@ Expected: true
 gtest_output_test_.cc:#: Failure
 Value of: 3
 Expected: 2
-[==========] Running 60 tests from 25 test cases.
+[==========] Running 61 tests from 26 test cases.
 [----------] Global test environment set-up.
 FooEnvironment::SetUp() called.
 BarEnvironment::SetUp() called.
@@ -411,7 +411,7 @@ Value of: TypeParam()
   Actual: 0
 Expected: 1
 Expected failure
-[  FAILED  ] TypedTest/0.Failure
+[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
 [----------] 2 tests from Unsigned/TypedTestP/0, where TypeParam = unsigned char
 [ RUN      ] Unsigned/TypedTestP/0.Success
 [       OK ] Unsigned/TypedTestP/0.Success
@@ -422,7 +422,7 @@ Value of: TypeParam()
 Expected: 1U
 Which is: 1
 Expected failure
-[  FAILED  ] Unsigned/TypedTestP/0.Failure
+[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
 [----------] 2 tests from Unsigned/TypedTestP/1, where TypeParam = unsigned int
 [ RUN      ] Unsigned/TypedTestP/1.Success
 [       OK ] Unsigned/TypedTestP/1.Success
@@ -433,7 +433,7 @@ Value of: TypeParam()
 Expected: 1U
 Which is: 1
 Expected failure
-[  FAILED  ] Unsigned/TypedTestP/1.Failure
+[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
 [----------] 4 tests from ExpectFailureTest
 [ RUN      ] ExpectFailureTest.ExpectFatalFailure
 (expecting 1 failure)
@@ -564,6 +564,13 @@ gtest_output_test_.cc:#: Failure
 Failed
 Expected non-fatal failure.
 [  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
+[----------] 1 test from PrintingFailingParams/FailingParamTest
+[ RUN      ] PrintingFailingParams/FailingParamTest.Fails/0
+gtest_output_test_.cc:#: Failure
+Value of: GetParam()
+  Actual: 2
+Expected: 1
+[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
 [----------] Global test environment tear-down
 BarEnvironment::TearDown() called.
 gtest_output_test_.cc:#: Failure
@@ -573,9 +580,9 @@ FooEnvironment::TearDown() called.
 gtest_output_test_.cc:#: Failure
 Failed
 Expected fatal failure.
-[==========] 60 tests from 25 test cases ran.
+[==========] 61 tests from 26 test cases ran.
 [  PASSED  ] 21 tests.
-[  FAILED  ] 39 tests, listed below:
+[  FAILED  ] 40 tests, listed below:
 [  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
 [  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
 [  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
@@ -615,8 +622,9 @@ Expected fatal failure.
 [  FAILED  ] ExpectFailureWithThreadsTest.ExpectFatalFailure
 [  FAILED  ] ExpectFailureWithThreadsTest.ExpectNonFatalFailure
 [  FAILED  ] ScopedFakeTestPartResultReporterTest.InterceptOnlyCurrentThread
+[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
 
-39 FAILED TESTS
+40 FAILED TESTS
   YOU HAVE 1 DISABLED TEST
 
 Note: Google Test filter = FatalFailureTest.*:LoggingTest.*

test/gtest_output_test_golden_win.txt

@@ -5,7 +5,7 @@ gtest_output_test_.cc:#: error: Value of: false
 Expected: true
 gtest_output_test_.cc:#: error: Value of: 3
 Expected: 2
-[==========] Running 61 tests from 27 test cases.
+[==========] Running 62 tests from 28 test cases.
 [----------] Global test environment set-up.
 FooEnvironment::SetUp() called.
 BarEnvironment::SetUp() called.
@@ -369,7 +369,7 @@ gtest_output_test_.cc:#: error: Value of: TypeParam()
   Actual: 0
 Expected: 1
 Expected failure
-[  FAILED  ] TypedTest/0.Failure
+[  FAILED  ] TypedTest/0.Failure, where TypeParam = int
 [----------] 2 tests from Unsigned/TypedTestP/0, where TypeParam = unsigned char
 [ RUN      ] Unsigned/TypedTestP/0.Success
 [       OK ] Unsigned/TypedTestP/0.Success
@@ -379,7 +379,7 @@ gtest_output_test_.cc:#: error: Value of: TypeParam()
 Expected: 1U
 Which is: 1
 Expected failure
-[  FAILED  ] Unsigned/TypedTestP/0.Failure
+[  FAILED  ] Unsigned/TypedTestP/0.Failure, where TypeParam = unsigned char
 [----------] 2 tests from Unsigned/TypedTestP/1, where TypeParam = unsigned int
 [ RUN      ] Unsigned/TypedTestP/1.Success
 [       OK ] Unsigned/TypedTestP/1.Success
@@ -389,7 +389,7 @@ gtest_output_test_.cc:#: error: Value of: TypeParam()
 Expected: 1U
 Which is: 1
 Expected failure
-[  FAILED  ] Unsigned/TypedTestP/1.Failure
+[  FAILED  ] Unsigned/TypedTestP/1.Failure, where TypeParam = unsigned int
 [----------] 4 tests from ExpectFailureTest
 [ RUN      ] ExpectFailureTest.ExpectFatalFailure
 (expecting 1 failure)
@@ -479,6 +479,12 @@ Failed
 Expected non-fatal failure.
 
 [  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
+[----------] 1 test from PrintingFailingParams/FailingParamTest
+[ RUN      ] PrintingFailingParams/FailingParamTest.Fails/0
+gtest_output_test_.cc:#: error: Value of: GetParam()
+  Actual: 2
+Expected: 1
+[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
 [----------] Global test environment tear-down
 BarEnvironment::TearDown() called.
 gtest_output_test_.cc:#: error: Failed
@@ -486,9 +492,9 @@ Expected non-fatal failure.
 FooEnvironment::TearDown() called.
 gtest_output_test_.cc:#: error: Failed
 Expected fatal failure.
-[==========] 61 tests from 27 test cases ran.
+[==========] 62 tests from 28 test cases ran.
 [  PASSED  ] 21 tests.
-[  FAILED  ] 40 tests, listed below:
+[  FAILED  ] 41 tests, listed below:
 [  FAILED  ] FatalFailureTest.FatalFailureInSubroutine
 [  FAILED  ] FatalFailureTest.FatalFailureInNestedSubroutine
 [  FAILED  ] FatalFailureTest.NonfatalFailureInSubroutine
@@ -529,8 +535,9 @@ Expected fatal failure.
 [  FAILED  ] ExpectFailureTest.ExpectNonFatalFailure
 [  FAILED  ] ExpectFailureTest.ExpectFatalFailureOnAllThreads
 [  FAILED  ] ExpectFailureTest.ExpectNonFatalFailureOnAllThreads
+[  FAILED  ] PrintingFailingParams/FailingParamTest.Fails/0, where GetParam() = 2
 
-40 FAILED TESTS
+41 FAILED TESTS
   YOU HAVE 1 DISABLED TEST
 
 Note: Google Test filter = FatalFailureTest.*:LoggingTest.*