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68 lines
1.8 KiB
68 lines
1.8 KiB
/*
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* Tests to verify we're reading in floats correctly
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*/
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var ASSERT = require('assert');
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/*
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* Test (32 bit) float
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*/
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function test() {
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var buffer = new Buffer(4);
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0x80;
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buffer[3] = 0x3f;
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ASSERT.equal(4.600602988224807e-41, buffer.readFloat(0, 'big'));
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ASSERT.equal(1, buffer.readFloat(0, 'little'));
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0xc0;
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ASSERT.equal(2.6904930515036488e-43, buffer.readFloat(0, 'big'));
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ASSERT.equal(-2, buffer.readFloat(0, 'little'));
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buffer[0] = 0xff;
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buffer[1] = 0xff;
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buffer[2] = 0x7f;
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buffer[3] = 0x7f;
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ASSERT.ok(isNaN(buffer.readFloat(0, 'big')));
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ASSERT.equal(3.4028234663852886e+38, buffer.readFloat(0, 'little'));
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buffer[0] = 0xab;
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buffer[1] = 0xaa;
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buffer[2] = 0xaa;
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buffer[3] = 0x3e;
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ASSERT.equal(-1.2126478207002966e-12, buffer.readFloat(0, 'big'));
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ASSERT.equal(0.3333333432674408, buffer.readFloat(0, 'little'));
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0;
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buffer[3] = 0;
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ASSERT.equal(0, buffer.readFloat(0, 'big'));
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ASSERT.equal(0, buffer.readFloat(0, 'little'));
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ASSERT.equal(false, 1/buffer.readFloat(0, 'little')<0);
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buffer[3] = 0x80;
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ASSERT.equal(1.793662034335766e-43, buffer.readFloat(0, 'big'));
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ASSERT.equal(0, buffer.readFloat(0, 'little'));
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ASSERT.equal(true, 1/buffer.readFloat(0, 'little')<0);
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0x80;
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buffer[3] = 0x7f;
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ASSERT.equal(4.609571298396486e-41, buffer.readFloat(0, 'big'));
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ASSERT.equal(Infinity, buffer.readFloat(0, 'little'));
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buffer[0] = 0;
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buffer[1] = 0;
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buffer[2] = 0x80;
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buffer[3] = 0xff;
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ASSERT.equal(4.627507918739843e-41, buffer.readFloat(0, 'big'));
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ASSERT.equal(-Infinity, buffer.readFloat(0, 'little'));
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}
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test();
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