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100 lines
2.7 KiB
100 lines
2.7 KiB
/*
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* Tests to verify we're reading in signed integers correctly
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*/
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var ASSERT = require('assert');
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/*
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* Test 8 bit signed integers
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*/
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function test8() {
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var data = new Buffer(4);
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data[0] = 0x23;
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ASSERT.equal(0x23, data.readInt8(0, true));
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ASSERT.equal(0x23, data.readInt8(0, false));
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data[0] = 0xff;
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ASSERT.equal(-1, data.readInt8(0, true));
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ASSERT.equal(-1, data.readInt8(0, false));
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data[0] = 0x87;
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data[1] = 0xab;
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data[2] = 0x7c;
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data[3] = 0xef;
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ASSERT.equal(-121, data.readInt8(0, true));
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ASSERT.equal(-85, data.readInt8(1, true));
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ASSERT.equal(124, data.readInt8(2, true));
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ASSERT.equal(-17, data.readInt8(3, true));
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ASSERT.equal(-121, data.readInt8(0, false));
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ASSERT.equal(-85, data.readInt8(1, false));
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ASSERT.equal(124, data.readInt8(2, false));
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ASSERT.equal(-17, data.readInt8(3, false));
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}
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function test16() {
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var buffer = new Buffer(6);
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buffer[0] = 0x16;
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buffer[1] = 0x79;
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ASSERT.equal(0x1679, buffer.readInt16(0, true));
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ASSERT.equal(0x7916, buffer.readInt16(0, false));
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buffer[0] = 0xff;
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buffer[1] = 0x80;
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ASSERT.equal(-128, buffer.readInt16(0, true));
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ASSERT.equal(-32513, buffer.readInt16(0, false));
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/* test offset with weenix */
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buffer[0] = 0x77;
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buffer[1] = 0x65;
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buffer[2] = 0x65;
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buffer[3] = 0x6e;
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buffer[4] = 0x69;
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buffer[5] = 0x78;
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ASSERT.equal(0x7765, buffer.readInt16(0, true));
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ASSERT.equal(0x6565, buffer.readInt16(1, true));
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ASSERT.equal(0x656e, buffer.readInt16(2, true));
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ASSERT.equal(0x6e69, buffer.readInt16(3, true));
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ASSERT.equal(0x6978, buffer.readInt16(4, true));
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ASSERT.equal(0x6577, buffer.readInt16(0, false));
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ASSERT.equal(0x6565, buffer.readInt16(1, false));
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ASSERT.equal(0x6e65, buffer.readInt16(2, false));
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ASSERT.equal(0x696e, buffer.readInt16(3, false));
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ASSERT.equal(0x7869, buffer.readInt16(4, false));
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}
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function test32() {
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var buffer = new Buffer(6);
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buffer[0] = 0x43;
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buffer[1] = 0x53;
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buffer[2] = 0x16;
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buffer[3] = 0x79;
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ASSERT.equal(0x43531679, buffer.readInt32(0, true));
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ASSERT.equal(0x79165343, buffer.readInt32(0, false));
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buffer[0] = 0xff;
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buffer[1] = 0xfe;
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buffer[2] = 0xef;
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buffer[3] = 0xfa;
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ASSERT.equal(-69638, buffer.readInt32(0, true));
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ASSERT.equal(-84934913, buffer.readInt32(0, false));
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buffer[0] = 0x42;
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buffer[1] = 0xc3;
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buffer[2] = 0x95;
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buffer[3] = 0xa9;
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buffer[4] = 0x36;
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buffer[5] = 0x17;
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ASSERT.equal(0x42c395a9, buffer.readInt32(0, true));
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ASSERT.equal(-1013601994, buffer.readInt32(1, true));
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ASSERT.equal(-1784072681, buffer.readInt32(2, true));
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ASSERT.equal(-1449802942, buffer.readInt32(0, false));
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ASSERT.equal(917083587, buffer.readInt32(1, false));
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ASSERT.equal(389458325, buffer.readInt32(2, false));
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}
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test8();
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test16();
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test32();
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