forked from 0ad/0ad
55 lines
1.7 KiB
C++
55 lines
1.7 KiB
C++
#include "lib/self_test.h"
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#include "lib/self_test.h"
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#include "lib/res/file/compression.h"
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class TestCompression : public CxxTest::TestSuite
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{
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public:
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void test_compress_decompress_compare()
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{
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// generate random input data
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// (limit values to 0..7 so that the data will actually be compressible)
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const size_t data_size = 10000;
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u8 data[data_size];
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for(size_t i = 0; i < data_size; i++)
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data[i] = rand() & 0x07;
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u8* cdata; size_t csize;
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u8 udata[data_size];
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// compress
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uintptr_t c = comp_alloc(CT_COMPRESSION, CM_DEFLATE);
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{
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TS_ASSERT(c != 0);
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const size_t csizeBound = comp_max_output_size(c, data_size);
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TS_ASSERT_OK(comp_alloc_output(c, csizeBound));
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const ssize_t cdata_produced = comp_feed(c, data, data_size);
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TS_ASSERT(cdata_produced >= 0);
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u32 checksum;
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TS_ASSERT_OK(comp_finish(c, &cdata, &csize, &checksum));
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TS_ASSERT(cdata_produced <= (ssize_t)csize); // can't have produced more than total
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}
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// decompress
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uintptr_t d = comp_alloc(CT_DECOMPRESSION, CM_DEFLATE);
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{
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TS_ASSERT(d != 0);
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comp_set_output(d, udata, data_size);
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const ssize_t udata_produced = comp_feed(d, cdata, csize);
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TS_ASSERT(udata_produced >= 0);
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u8* udata_final; size_t usize_final; u32 checksum;
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TS_ASSERT_OK(comp_finish(d, &udata_final, &usize_final, &checksum));
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TS_ASSERT(udata_produced <= (ssize_t)usize_final); // can't have produced more than total
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TS_ASSERT_EQUALS(udata_final, udata); // output buffer address is same
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TS_ASSERT_EQUALS(usize_final, data_size); // correct amount of output
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}
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comp_free(c);
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comp_free(d);
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// verify data survived intact
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TS_ASSERT_SAME_DATA(data, udata, data_size);
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}
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};
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