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#include <string.h>
#include "unittest.h"
#define SourceStringSize 384 // test correct page passing (>256, multiple of 128 here)
static char SourceString[SourceStringSize+1]; // +1 room for terminating null
static char DestinationString[2*SourceStringSize+1]; // will contain two times the source buffer
TEST
{
unsigned i;
char* p;
for (i=0; i < SourceStringSize; ++i)
SourceString[i] = (i%128)+1;
SourceString[i] = 0;
ASSERT_AreEqual(SourceStringSize, strlen(SourceString), "%u", "Source string initialization or 'strlen()' problem!");
/* Ensure empty destination string */
DestinationString[0] = 0;
ASSERT_AreEqual(0, strlen(DestinationString), "%u", "Destination string initialization or 'strlen()' problem!");
/* Test "unlimted" concatenation to empty buffer */
strncat(DestinationString, SourceString, 1024);
ASSERT_AreEqual(SourceStringSize, strlen(DestinationString), "%u", "Unexpected string length while string concatenation to empty buffer!");
/* Test limited concatenation to non empty buffer */
p = strncat(DestinationString, SourceString, 128);
ASSERT_AreEqual(SourceStringSize+128, strlen(DestinationString), "%u", "Unexpected string length while string concatenation to non-empty buffer!");
/* Test return value */
ASSERT_IsTrue(p == DestinationString, "Invalid return value!");
/* Test contents */
for(i=0; i < strlen(DestinationString); ++i)
{
unsigned current = DestinationString[i];
unsigned expected = (i%128)+1;
ASSERT_AreEqual(expected, current, "%u", "Unexpected destination buffer contents at position %u!\n" COMMA i);
}
}
ENDTEST
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