feat: adjust tdd

.gitignore

@@ -0,0 +1,2 @@
+*.csv
+a.out

write-location-file/main.c

@@ -38,7 +38,7 @@ int main()
   fprintf(fp, "%8s,%8s\n", lat, lon);
   fclose(fp);
 
-  write_location_file();
+  write_location_file("52.26594", "10.52673");
 
   printf("\nDone!\n");
   return 0;

write-location-file/write-location-file-test.c

@@ -1,16 +1,38 @@
 /*write-location-file-test.c*/
-
 #include "write-location-file.h"
 
-/*use printf*/
-//#include <stdio.h>
-
 #include <assert.h>
 #include <stdbool.h>
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/*use macro extern int errno*/
+#include <errno.h>
+
 static void test(){
-  //printf("write_location_file() return %d:\n",write_location_file());
-  assert(write_location_file()==0 && "test()");
+    FILE* read;
+    char buf[17];
+    read = fopen("location-file.csv", "a+");
+
+    if (NULL == read) {
+      /*failed to open file and associate stream*/
+      fprintf(stderr, "Value of errno: %d\n", errno);
+      fprintf(stderr, "Error opening file: %s\n", strerror(errno));
+    }
+
+    //printf("content of this file are \n");
+    fscanf(read, "%17s", buf);
+    printf("test() buf: %17s\n", buf);
+
+    fclose(read);
+
+    char result[18] = "52.26594,10.52673";
+    printf("test() result: %17s\n", result);
+
+    assert(strcmp(buf, result)==0 && "test()");
+    //assert(write_location_file("52.26594", "10.52673")==0 && "test()");
 }
 
 int main(){

write-location-file/write-location-file.c

@@ -8,12 +8,14 @@
 #include <errno.h>
 #include <string.h>
 
-int write_location_file(){
+int write_location_file(char *lat, char *lon){
   FILE *fp;
 
 
   printf("\nwrite-location-file() Start...\n");
 
+  printf("\nwrite-location-file() lat: %s, lon: %s\n", lat, lon);
+
   fp = fopen("location-file.csv", "w");
   if (fp==NULL)
   {
@@ -24,7 +26,7 @@ int write_location_file(){
 
   /*latitude e.g. 52.26594*/
   /*longitude e.g. 10.52673*/
-  fprintf(fp, "52.26594,10.52673\n");
+  fprintf(fp, "%s,%s\n", lat, lon);
   fclose(fp);
 
   printf("\nwrite-location-file() Done!\n");

write-location-file/write-location-file.h

@@ -1,3 +1,3 @@
 /*write-location-file.h*/
 
-int write_location_file();
+int write_location_file(char *lat, char *lon);