Yet closer to functional output.

[pdclib.old] / functions / stdio / clearerr.c

diff --git a/functions/stdio/clearerr.c b/functions/stdio/clearerr.c
index 6d80c8aeb381639c62b9fbf0a4194ff68b083bc7..4c51d714f54aefb4c019a6b8c216bd6820d19634 100644 (file)
--- a/functions/stdio/clearerr.c
+++ b/functions/stdio/clearerr.c
@@ -22,7 +22,36 @@ void clearerr( struct _PDCLIB_file_t * stream )
 
 int main( void )
 {
+#ifndef REGTEST
+    FILE file = { 0, { 0 }, NULL, 0, 0, 0, NULL };
+    FILE * fh = &file;
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_ERRORFLAG;
+    TESTCASE( ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_EOFFLAG;
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+    fh->status |= _PDCLIB_EOFFLAG | _PDCLIB_ERRORFLAG;
+    TESTCASE( ferror( fh ) );
+    TESTCASE( feof( fh ) );
+    clearerr( fh );
+    TESTCASE( ! ferror( fh ) );
+    TESTCASE( ! feof( fh ) );
+#else
+    /* TODO: The above is ad-hoc and PDCLib specific. A better test driver
+       should be internals-agnostic (provoking the error / eof flag by
+       "regular" operations).
+    */
     TESTCASE( NO_TESTDRIVER );
+#endif
     return TEST_RESULTS;
 }