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