Add GetAppOutput function, a better replacement for popen.

base/process_util_unittest.cc

Index: base/process_util_unittest.cc
diff --git a/base/process_util_unittest.cc b/base/process_util_unittest.cc
index acb60e046e7ab98dabe99b973a3262156c4d820a..fba7b2b4fa7bac5a8c4ef085748632bb7998231f 100644
--- a/base/process_util_unittest.cc
+++ b/base/process_util_unittest.cc
@@ -4,6 +4,7 @@
 
 #define _CRT_SECURE_NO_WARNINGS
 
+#include "base/command_line.h"
 #include "base/multiprocess_test.h"
 #include "base/platform_thread.h"
 #include "base/process_util.h"
@@ -218,6 +219,21 @@ TEST_F(ProcessUtilTest, FDRemapping) {
   close(dev_null);
 }
 
+TEST_F(ProcessUtilTest, GetAppOutput) {
+  std::string output;
+  EXPECT_TRUE(GetAppOutput(CommandLine(L"true"), &output));
+  EXPECT_STREQ("", output.c_str());
+
+  EXPECT_FALSE(GetAppOutput(CommandLine(L"false"), &output));
+
+  std::vector<std::string> argv;
+  argv.push_back("/bin/echo");
+  argv.push_back("-n");
+  argv.push_back("foobar42");
+  EXPECT_TRUE(GetAppOutput(CommandLine(argv), &output));
+  EXPECT_STREQ("foobar42", output.c_str());
+}
+
 #endif  // defined(OS_POSIX)
 
 }  // namespace base