TestChildNative should write stdout in the binary mode

Author: asmichi

src/ChildProcess.Native/tests/DumpEnvironmentVariables.unix.cpp

@@ -7,7 +7,7 @@
 
 extern char** environ;
 
-int TestCommandDumpEnvironmentvariables(int, const char* const*)
+int TestCommandDumpEnvironmentVariables(int, const char* const*)
 {
     for (char** p = environ; *p != nullptr; p++)
     {

src/ChildProcess.Native/tests/DumpEnvironmentVariables.win.cpp

@@ -7,10 +7,18 @@
 #include <cstdint>
 #include <cstdio>
 #include <cstdlib>
+#include <fcntl.h>
+#include <io.h>
 #include <memory>
 
-int TestCommandDumpEnvironmentvariables(int argc, const char* const* argv)
+int TestCommandDumpEnvironmentVariables(int argc, const char* const* argv)
 {
+    if (_setmode(_fileno(stdout), O_BINARY) == -1)
+    {
+        perror("_setmode");
+        return 1;
+    }
+
     wchar_t* pFirstEnv = GetEnvironmentStringsW();
     if (pFirstEnv == nullptr)
     {

src/ChildProcess.Native/tests/TestChildMain.cpp

@@ -10,7 +10,7 @@ extern void SetupDefaultTestSignalHandlers();
 
 // Handlers
 extern int TestCommandReportSignal(int argc, const char* const* argv);
-extern int TestCommandDumpEnvironmentvariables(int argc, const char* const* argv);
+extern int TestCommandDumpEnvironmentVariables(int argc, const char* const* argv);
 #if defined(_WIN32)
 #else
 #endif
@@ -25,7 +25,7 @@ namespace
 
     TestCommandDefinition TestCommandDefinitions[] = {
         {"ReportSignal", TestCommandReportSignal},
-        {"DumpEnvironmentVariables", TestCommandDumpEnvironmentvariables},
+        {"DumpEnvironmentVariables", TestCommandDumpEnvironmentVariables},
 #if defined(_WIN32)
 #else
 #endif

src/ChildProcess.Test/ProcessManagement/ChildProcessTest_EnvironmentVariables.cs

@@ -30,6 +30,8 @@ public void CanAddEnvironmentVariables()
             {
                 new("A", "A"),
                 new("BB", "BB"),
+                // This is actually testing if TestChildNative writes to stdout in the binary mode.
+                new("C", "C\nC\n"),
             };
 
             var expected = GetProcessEnvVars().Concat(extraEnvVars);