Add new getfullyqualifiedname test

tests/CMakeLists.txt

@@ -5,6 +5,7 @@ add_executable(psnative-test
   test-getusername.cpp
   test-getcomputername.cpp
   test-getlinkcount.cpp
+  test-getfullyqualifiedname.cpp
   main.cpp)
 
 # manually include gtest headers

tests/test-getfullyqualifiedname.cpp

@@ -0,0 +1,35 @@
+//! @file test-getfullyqualifiedname.cpp
+//! @author George Fleming <v-geflem@microsoft.com>
+//! @brief Unit tests for GetFullyQualifiedName
+
+#include <stdio.h>
+#include <gtest/gtest.h>
+#include "getfullyqualifiedname.h"
+
+//! Test fixture for GetComputerNameTest
+class GetFullyQualifiedNameTest : public ::testing::Test
+{
+};
+
+TEST_F(GetFullyQualifiedNameTest, ValidateLinuxGetFullyQualifiedDomainName)
+{
+    char expectedComputerName[HOST_NAME_MAX];
+    
+    //Get expected result from using linux command
+
+    FILE *fPtr = popen("/bin/hostname --fqdn", "r");
+    ASSERT_TRUE(fPtr != NULL);
+
+    char *linePtr = fgets(expectedComputerName, sizeof(expectedComputerName), fPtr);
+    ASSERT_TRUE(linePtr != NULL);
+
+    // There's a tendency to have \n at end of fgets string, so remove it before compare
+    size_t sz = strlen(expectedComputerName);
+    if (sz > 0 && expectedComputerName[sz - 1] == '\n')
+    {
+        expectedComputerName[sz - 1] = '\0';
+    }
+    pclose(fPtr);
+
+    ASSERT_STREQ(GetFullyQualifiedName(), expectedComputerName);
+}