tests: internal: Make Windows compatible on error_reporter cases

Signed-off-by: Hiroshi Hatake <hiroshi@chronosphere.io>

Author: cosmo0920

tests/internal/error_reporter.c

@@ -1,23 +1,41 @@
 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 #include <stdio.h>
 #include <stdlib.h>
-#include <unistd.h>
 #include <time.h>
 #include <monkey/mk_core/mk_list.h>
 
+#include <fluent-bit/flb_compat.h>
 #include <fluent-bit/flb_mem.h>
 #include <fluent-bit/aws/flb_aws_error_reporter.h>
 
 #include "flb_tests_internal.h"
 
-const char* file_path = "/tmp/error.log";
+#ifdef FLB_SYSTEM_WINDOWS
+#define TEST_ERROR_FILE_PATH "error.log"
+#define TEST_INVALID_ERROR_FILE_PATH "NUL\\error.log"
+
+static int test_setenv(const char *name, const char *value, int overwrite)
+{
+    if (overwrite == 0 && getenv(name) != NULL) {
+        return 0;
+    }
+
+    return _putenv_s(name, value);
+}
+#else
+#define TEST_ERROR_FILE_PATH "/tmp/error.log"
+#define TEST_INVALID_ERROR_FILE_PATH "/dev/null/error.log"
+#define test_setenv(name, value, overwrite) setenv(name, value, overwrite)
+#endif
+
+const char* file_path = TEST_ERROR_FILE_PATH;
 const char* error_message_1 = "[engine] scheduler could not start";
 const char* error_message_2 = "[engine] scheduler could not stop";
 
 
 void test_flb_aws_error_reporter_create() {
 
-    setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
+    test_setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
     struct flb_aws_error_reporter *error_reporter = flb_aws_error_reporter_create();
     TEST_CHECK((void*) error_reporter != NULL);
     TEST_CHECK((void*)error_reporter->file_path != NULL);
@@ -36,7 +54,7 @@ void test_flb_aws_error_reporter_write() {
     }
     error_message_3[1040] = '\0';
 
-    setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
+    test_setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
 
     struct flb_aws_error_reporter *error_reporter = flb_aws_error_reporter_create();
     flb_aws_error_reporter_write(error_reporter, error_message_1);
@@ -62,7 +80,7 @@ void test_flb_aws_error_reporter_write() {
 
 void test_flb_aws_error_reporter_clean() {
 
-    setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
+    test_setenv(STATUS_MESSAGE_FILE_PATH_ENV, file_path, 1);
     struct flb_aws_error_reporter *error_reporter = flb_aws_error_reporter_create();
     flb_aws_error_reporter_write(error_reporter, error_message_1);
     time_t start = time(NULL);
@@ -79,8 +97,8 @@ void test_flb_aws_error_reporter_write_open_failure()
     int ret;
     struct flb_aws_error_reporter *error_reporter;
 
-    setenv(STATUS_MESSAGE_FILE_PATH_ENV,
-           "/dev/null/error.log", 1);
+    test_setenv(STATUS_MESSAGE_FILE_PATH_ENV,
+                TEST_INVALID_ERROR_FILE_PATH, 1);
 
     error_reporter = flb_aws_error_reporter_create();
     TEST_CHECK(error_reporter != NULL);