More tests for multireporter: infering stdout passthrough correctly

tests/CMakeLists.txt

@@ -418,6 +418,33 @@ set_tests_properties("ErrorHandling::InvalidTestSpecExitsEarly"
     FAIL_REGULAR_EXPRESSION "No tests ran"
 )
 
+if (MSVC)
+  set(_NullFile "NUL")
+else()
+  set(_NullFile "/dev/null")
+endif()
+
+add_test(NAME "MultiReporter::CapturingReportersDontPropagateStdOut"
+  COMMAND
+    $<TARGET_FILE:SelfTest> "Sends stuff to stdout and stderr"
+      --reporter xml:${_NullFile}
+      --reporter junit:${_NullFile}
+)
+set_tests_properties("MultiReporter::CapturingReportersDontPropagateStdOut"
+  PROPERTIES
+    FAIL_REGULAR_EXPRESSION ".+"
+)
+add_test(NAME "MultiReporter::NonCapturingReportersPropagateStdout"
+  COMMAND
+    $<TARGET_FILE:SelfTest> "Sends stuff to stdout and stderr"
+      --reporter xml:${_NullFile}
+      --reporter console:${_NullFile}
+)
+set_tests_properties("MultiReporter::NonCapturingReportersPropagateStdout"
+  PROPERTIES
+    PASS_REGULAR_EXPRESSION "A string sent to stderr via clog"
+)
+
 
 if (CATCH_USE_VALGRIND)
     add_test(NAME ValgrindRunTests COMMAND valgrind --leak-check=full --error-exitcode=1 $<TARGET_FILE:SelfTest>)