import RT-Thread@9217865c without bsp, libcpu and components/net

examples/utest/testcases/posix/stdio_h/functions/fprintf_tc.c

@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <string.h>
+
+static int fdopen_entry(void)
+{
+    FILE *stream;
+    char test_data[] = "1a2bxx";
+    char gets[sizeof(test_data)] = {0};
+    size_t size = 0;
+    int ret = 0;
+
+    stream = fopen("fopen_file.txt","w");
+    if (stream == NULL)
+    {
+        perror("fopen fail");
+        ret = -1;
+        goto __exit;
+    }
+    fprintf(stream, "%d%c%d%c%s",1,'a',2,'b',"xx");
+    fclose(stream);
+
+    stream = fopen("fopen_file.txt","r");
+    fgets(gets, sizeof(gets), stream);
+
+    if(strcmp(test_data, gets))
+    {
+        printf("%s\n",gets);
+        ret = -1;
+    }
+__exit:
+    fclose(stream);
+    return ret;
+}
+
+#include <utest.h>
+static void test_fdopen(void)
+{
+    uassert_int_equal(fdopen_entry(), 0);
+}
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_fdopen);
+}
+UTEST_TC_EXPORT(testcase, "posix.stdio_h.fprintf.c", RT_NULL, RT_NULL, 10);
+