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

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

@@ -0,0 +1,44 @@
+#include <stdio.h>
+
+static int putc_entry(void)
+{
+    FILE *stream;
+    int ch = 'a';
+    int getc = {0};
+    size_t size = 0;
+    int ret = 0;
+
+    stream = fopen("fopen_file.txt","w");
+    if (stream == NULL)
+    {
+        perror("fopen fail");
+        ret = -1;
+        goto __exit;
+    }
+    putc(ch, stream);
+    fclose(stream);
+
+    stream = fopen("fopen_file.txt","r");
+    getc = fgetc(stream);
+
+    if(getc != ch)
+    {
+        printf("fputc test:getc %c",getc);
+        ret = -1;
+    }
+__exit:
+    fclose(stream);
+    return ret;
+}
+
+#include <utest.h>
+static void test_putc(void)
+{
+    uassert_int_equal(putc_entry(), 0);
+}
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_putc);
+}
+UTEST_TC_EXPORT(testcase, "rtt_posix_testcase.stdio_h."__FILE__, RT_NULL, RT_NULL, 10);
+