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#include <cxxtest/TestSuite.h>
#include "common/memstream.h"
#include "common/substream.h"
class SeekableSubReadStreamTestSuite : public CxxTest::TestSuite {
public:
void test_traverse() {
byte contents[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Common::MemoryReadStream ms(contents, 10);
int start = 2, end = 8;
Common::SeekableSubReadStream ssrs(&ms, start, end);
int i;
byte b;
for (i = start; i < end; ++i) {
TS_ASSERT(!ssrs.eos());
TS_ASSERT_EQUALS(i - start, ssrs.pos());
ssrs.read(&b, 1);
TS_ASSERT_EQUALS(i, b);
}
TS_ASSERT(!ssrs.eos());
TS_ASSERT_EQUALS((uint)0, ssrs.read(&b, 1));
TS_ASSERT(ssrs.eos());
}
void test_seek() {
byte contents[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Common::MemoryReadStream ms(contents, 10);
Common::SeekableSubReadStream ssrs(&ms, 1, 9);
byte b;
TS_ASSERT_EQUALS(ssrs.pos(), 0);
ssrs.seek(1, SEEK_SET);
TS_ASSERT_EQUALS(ssrs.pos(), 1);
b = ssrs.readByte();
TS_ASSERT_EQUALS(b, 2);
ssrs.seek(5, SEEK_CUR);
TS_ASSERT_EQUALS(ssrs.pos(), 7);
b = ssrs.readByte();
TS_ASSERT_EQUALS(b, 8);
ssrs.seek(-3, SEEK_CUR);
TS_ASSERT_EQUALS(ssrs.pos(), 5);
b = ssrs.readByte();
TS_ASSERT_EQUALS(b, 6);
ssrs.seek(0, SEEK_END);
TS_ASSERT_EQUALS(ssrs.pos(), 8);
TS_ASSERT(!ssrs.eos());
b = ssrs.readByte();
TS_ASSERT(ssrs.eos());
ssrs.seek(-3, SEEK_END);
TS_ASSERT(!ssrs.eos());
TS_ASSERT_EQUALS(ssrs.pos(), 5);
b = ssrs.readByte();
TS_ASSERT_EQUALS(b, 6);
ssrs.seek(-8, SEEK_END);
TS_ASSERT_EQUALS(ssrs.pos(), 0);
b = ssrs.readByte();
TS_ASSERT_EQUALS(b, 1);
}
};
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