fix issue#327

tests/print_number.c

@@ -27,6 +27,8 @@
 static void assert_print_number(const char *expected, double input)
 {
     unsigned char printed[1024];
+    unsigned char new_buffer[26];
+    unsigned int i = 0;
     cJSON item[1];
     printbuffer buffer = { 0, 0, 0, 0, 0, 0, { 0, 0, 0 } };
     buffer.buffer = printed;
@@ -34,11 +36,29 @@ static void assert_print_number(const char *expected, double input)
     buffer.offset = 0;
     buffer.noalloc = true;
     buffer.hooks = global_hooks;
+    buffer.buffer = new_buffer;
 
     memset(item, 0, sizeof(item));
+    memset(new_buffer, 0, sizeof(new_buffer));
     cJSON_SetNumberValue(item, input);
-
     TEST_ASSERT_TRUE_MESSAGE(print_number(item, &buffer), "Failed to print number.");
+    
+    /* In MinGW or visual studio(before 2015),the exponten is represented using three digits,like:"1e-009","1e+017"
+     * remove extra "0" to output "1e-09" or "1e+17",which makes testcase PASS */
+    for(i = 0;i <sizeof(new_buffer);i++)
+    {
+        if(i >3 && new_buffer[i] =='0')
+        {
+            if((new_buffer[i-3] =='e' && new_buffer[i-2] == '-' && new_buffer[i] =='0') ||(new_buffer[i-2] =='e' && new_buffer[i-1] =='+'))
+            {
+                while(new_buffer[i] !='\0')
+                {
+                    new_buffer[i] = new_buffer[i+1];
+                    i++;
+                }
+            }        
+        }  
+    }    
     TEST_ASSERT_EQUAL_STRING_MESSAGE(expected, buffer.buffer, "Printed number is not as expected.");
 }