Googletest export

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

@@ -483,7 +483,7 @@ struct MarkAsIgnored {
 };
 
 GTEST_API_ void InsertSyntheticTestCase(const std::string& name,
-                                        CodeLocation location);
+                                        CodeLocation location, bool has_test_p);
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 //
@@ -600,7 +600,8 @@ class ParameterizedTestSuiteInfo : public ParameterizedTestSuiteInfoBase {
 
     if (!generated_instantiations) {
       // There are no generaotrs, or they all generate nothing ...
-      InsertSyntheticTestCase(GetTestSuiteName(), code_location_);
+      InsertSyntheticTestCase(GetTestSuiteName(), code_location_,
+                              !tests_.empty());
     }
   }    // RegisterTests
 

googletest/src/gtest.cc

@@ -455,19 +455,32 @@ MarkAsIgnored::MarkAsIgnored(const char* test_suite) {
 
 // If this parameterized test suite has no instantiations (and that
 // has not been marked as okay), emit a test case reporting that.
-void InsertSyntheticTestCase(const std::string &name, CodeLocation location) {
+void InsertSyntheticTestCase(const std::string& name, CodeLocation location,
+                             bool has_test_p) {
   const auto& ignored = *GetIgnoredParameterizedTestSuites();
   if (ignored.find(name) != ignored.end()) return;
 
-  std::string message =
-      "Paramaterized test suite " + name +
+  const char kMissingInstantiation[] =  //
       " is defined via TEST_P, but never instantiated. None of the test cases "
       "will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only "
       "ones provided expand to nothing."
       "\n\n"
       "Ideally, TEST_P definitions should only ever be included as part of "
       "binaries that intend to use them. (As opposed to, for example, being "
-      "placed in a library that may be linked in to get other utilities.)"
+      "placed in a library that may be linked in to get other utilities.)";
+
+  const char kMissingTestCase[] =  //
+      " is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are "
+      "defined via TEST_P . No test cases will run."
+      "\n\n"
+      "Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from "
+      "code that always depend on code that provides TEST_P. Failing to do "
+      "so is often an indication of dead code, e.g. the last TEST_P was "
+      "removed but the rest got left behind.";
+
+  std::string message =
+      "Paramaterized test suite " + name +
+      (has_test_p ? kMissingInstantiation : kMissingTestCase) +
       "\n\n"
       "To suppress this error for this test suite, insert the following line "
       "(in a non-header) in the namespace it is defined in:"

googletest/test/googletest-output-test-golden-lin.txt

@@ -12,7 +12,7 @@ Expected equality of these values:
   3
 Stack trace: (omitted)
 
-[==========] Running 87 tests from 41 test suites.
+[==========] Running 88 tests from 41 test suites.
 [----------] Global test environment set-up.
 FooEnvironment::SetUp() called.
 BarEnvironment::SetUp() called.
@@ -982,7 +982,16 @@ Expected failure
 Stack trace: (omitted)
 
 [  FAILED  ] PrintingStrings/ParamTest.Failure/a, where GetParam() = "a"
-[----------] 2 tests from GoogleTestVerification
+[----------] 3 tests from GoogleTestVerification
+[ RUN      ] GoogleTestVerification.UninstantiatedParamaterizedTestSuite<NoTests>
+Paramaterized test suite NoTests is instantiated via INSTANTIATE_TEST_SUITE_P, but no tests are defined via TEST_P . No test cases will run.
+
+Ideally, INSTANTIATE_TEST_SUITE_P should only ever be invoked from code that always depend on code that provides TEST_P. Failing to do so is often an indication of dead code, e.g. the last TEST_P was removed but the rest got left behind.
+
+To suppress this error for this test suite, insert the following line (in a non-header) in the namespace it is defined in:
+
+GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(NoTests);
+[       OK ] GoogleTestVerification.UninstantiatedParamaterizedTestSuite<NoTests>
 [ RUN      ] GoogleTestVerification.UninstantiatedParamaterizedTestSuite<DetectNotInstantiatedTest>
 Paramaterized test suite DetectNotInstantiatedTest is defined via TEST_P, but never instantiated. None of the test cases will run. Either no INSTANTIATE_TEST_SUITE_P is provided or the only ones provided expand to nothing.
 
@@ -1014,8 +1023,8 @@ Failed
 Expected fatal failure.
 Stack trace: (omitted)
 
-[==========] 87 tests from 41 test suites ran.
-[  PASSED  ] 33 tests.
+[==========] 88 tests from 41 test suites ran.
+[  PASSED  ] 34 tests.
 [  FAILED  ] 54 tests, listed below:
 [  FAILED  ] NonfatalFailureTest.EscapesStringOperands
 [  FAILED  ] NonfatalFailureTest.DiffForLongStrings

googletest/test/googletest-output-test_.cc

@@ -790,6 +790,10 @@ INSTANTIATE_TEST_SUITE_P(PrintingStrings,
                          testing::Values(std::string("a")),
                          ParamNameFunc);
 
+// The case where a suite has INSTANTIATE_TEST_SUITE_P but not TEST_P.
+using NoTests = ParamTest;
+INSTANTIATE_TEST_SUITE_P(ThisIsOdd, NoTests, ::testing::Values("Hello"));
+
 // fails under kErrorOnUninstantiatedParameterizedTest=true
 class DetectNotInstantiatedTest : public testing::TestWithParam<int> {};
 TEST_P(DetectNotInstantiatedTest, Used) { }