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

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

@@ -0,0 +1,54 @@
+#include <stdio.h>
+#include <string.h>
+
+static int fgetc_entry(void)
+{
+    FILE *stream;
+    char data[] = "test fgetc";
+    char getc[sizeof(data)] = {0};
+    size_t size = 0;
+    int ret = 0;
+    int i=0;
+
+    stream = fopen("fopen_file.txt","w+");
+    if (stream == NULL)
+    {
+        perror("fopen fail");
+        ret = -1;
+        goto __exit;
+    }
+
+    fwrite(data, sizeof(data), 1, stream);
+    fclose(stream);
+
+    stream = fopen("fopen_file.txt","r");
+    while(1)
+    {
+        getc[i] = fgetc(stream);
+        i++;
+        if( feof(stream) )
+        {
+            break ;
+        }
+    }
+
+    if(strcmp(getc, data))
+    {
+        return -1;
+    }
+    fclose(stream);
+__exit:
+    return ret;
+}
+
+#include <utest.h>
+static void test_fgetc(void)
+{
+    uassert_int_equal(fgetc_entry(), 0);
+}
+static void testcase(void)
+{
+    UTEST_UNIT_RUN(test_fgetc);
+}
+UTEST_TC_EXPORT(testcase, "posix.stdio_h.fgetc.c", RT_NULL, RT_NULL, 10);
+