diff options
Diffstat (limited to 'src/pal/tests/palsuite/c_runtime/fgets/test3/test3.cpp')
-rw-r--r-- | src/pal/tests/palsuite/c_runtime/fgets/test3/test3.cpp | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/fgets/test3/test3.cpp b/src/pal/tests/palsuite/c_runtime/fgets/test3/test3.cpp new file mode 100644 index 0000000000..525ba9327f --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/fgets/test3/test3.cpp @@ -0,0 +1,73 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +/*============================================================================ +** +** Source: test3.c +** +** Purpose: Tries to read from an empty file using fgets(), to verify +** handling of EOF condition. +** +** +**==========================================================================*/ + +#include <palsuite.h> + +int __cdecl main(int argc, char **argv) +{ + char inBuf[10]; + const char filename[] = "testfile.tmp"; + + FILE * fp; + if (PAL_Initialize(argc, argv)) + { + return FAIL; + } + + + /*write the empty file that we will use to test */ + fp = fopen(filename, "w"); + if (fp == NULL) + { + Fail("Unable to open file for write.\n"); + } + + /*Don't write anything*/ + + if (fclose(fp) != 0) + { + Fail("Error closing stream opened for write.\n"); + } + + + /*Open the file and try to read.*/ + fp = fopen(filename, "r"); + if (fp == NULL) + { + Fail("Unable to open file for read.\n"); + } + + + if (fgets(inBuf, sizeof(inBuf) , fp) != NULL) + { + /*NULL could also mean an error condition, but since the PAL + doesn't supply feof or ferror, we can't distinguish between + the two.*/ + Fail("fgets doesn't handle EOF properly. When asked to read from " + "an empty file, it didn't return NULL as it should have.\n"); + } + + if (fclose(fp) != 0) + { + Fail("Error closing an empty file after trying to use fgets().\n"); + } + PAL_Terminate(); + return PASS; + +} + + + + + |