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Diffstat (limited to 'src/pal/tests/palsuite/c_runtime/fopen/test6/test6.cpp')
-rw-r--r-- | src/pal/tests/palsuite/c_runtime/fopen/test6/test6.cpp | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/c_runtime/fopen/test6/test6.cpp b/src/pal/tests/palsuite/c_runtime/fopen/test6/test6.cpp new file mode 100644 index 0000000000..03b6067fdd --- /dev/null +++ b/src/pal/tests/palsuite/c_runtime/fopen/test6/test6.cpp @@ -0,0 +1,131 @@ +// 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: test6.c +** +** Purpose: Tests the PAL implementation of the fopen function. +** Test to ensure that you can write to an 'a' mode file. +** And that you can't read from a 'a' mode file. Also ensure +** that you can use fseek and still write to the end of a file. +** +** Depends: +** fprintf +** fgets +** fseek +** fclose +** + +** +**===================================================================*/ + +#include <palsuite.h> + +int __cdecl main(int argc, char **argv) +{ + + FILE *fp; + char buffer[128]; + + if (PAL_Initialize(argc, argv)) + { + return FAIL; + } + + + /* Open a file with 'a+' mode */ + if( (fp = fopen( "testfile", "a" )) == NULL ) + { + Fail( "ERROR: The file failed to open with 'a' mode.\n" ); + } + + /* Write some text to the file */ + if(fprintf(fp,"%s","some text") <= 0) + { + Fail("ERROR: Attempted to WRITE to a file opened with 'a' mode " + "but fprintf failed. Either fopen or fprintf have problems."); + } + + if(fseek(fp, 0, SEEK_SET)) + { + Fail("ERROR: fseek failed, and this test depends on it."); + } + + /* Attempt to read from the 'a' only file, should fail */ + if(fgets(buffer,10,fp) != NULL) + { + Fail("ERROR: Tried to READ from a file with 'a' mode set. " + "This should fail, but fgets returned success. Either fgets " + "or fopen is broken."); + } + + + /* Attempt to write to a file after using 'a' and fseek */ + fp = fopen("testfile2", "a"); + if(fp == NULL) + { + Fail("ERROR: The file failed to be created with 'a' mode.\n"); + } + + /* write text to the file initially */ + if(fprintf(fp,"%s","abcd") <= 0) + { + Fail("ERROR: Attempted to WRITE to a file opened with 'a' mode " + "but fprintf failed. Either fopen or fprintf have problems.\n"); + } + + /* set the pointer to the front of the file */ + if(fseek(fp, 0, SEEK_SET)) + { + Fail("ERROR: fseek failed, and this test depends on it.\n"); + } + + /* using 'a' should still write to the end of the file, not the front */ + if(fputs("efgh",fp) < 0) + { + Fail("ERROR: Attempted to WRITE to a file opened with 'a' mode " + "but fputs failed.\n"); + } + + /* set the pointer to the front of the file */ + if(fseek(fp, 0, SEEK_SET)) + { + Fail("ERROR: fseek failed, and this test depends on it.\n"); + } + + /* a file with 'a' mode can only write, so close the file before reading */ + if(fclose(fp)) + { + Fail("ERROR: fclose failed when it should have succeeded.\n"); + } + + /* open the file again to read */ + fp = fopen("testfile2","r"); + if(fp == NULL) + { + Fail("ERROR: fopen failed to open the file using 'r' mode"); + } + + /* Attempt to read from the 'a' only file, should succeed */ + if(fgets(buffer,10,fp) == NULL) + { + Fail("ERROR: Tried to READ from a file with 'a' mode set. " + "This should pass, but fgets returned failure. Either fgets " + "or fopen is broken.\n"); + } + + /* Compare what was read and what should have been in the file */ + if(memcmp(buffer,"abcdefgh",8)) + { + Fail("ERROR: The string read should have equaled 'abcdefgh' " + "but instead it is %s\n", buffer); + } + + + PAL_Terminate(); + return PASS; +} + + |