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71 lines
1.7 KiB
71 lines
1.7 KiB
'use strict';
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/*
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* Tests to verify we're reading in floats correctly
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*/
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require('../common');
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const 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(clazz) {
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var buffer = new clazz(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.readFloatBE(0));
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assert.equal(1, buffer.readFloatLE(0));
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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.readFloatBE(0));
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assert.equal(-2, buffer.readFloatLE(0));
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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.readFloatBE(0)));
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assert.equal(3.4028234663852886e+38, buffer.readFloatLE(0));
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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.readFloatBE(0));
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assert.equal(0.3333333432674408, buffer.readFloatLE(0));
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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.readFloatBE(0));
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assert.equal(0, buffer.readFloatLE(0));
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assert.equal(false, 1 / buffer.readFloatLE(0) < 0);
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buffer[3] = 0x80;
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assert.equal(1.793662034335766e-43, buffer.readFloatBE(0));
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assert.equal(0, buffer.readFloatLE(0));
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assert.equal(true, 1 / buffer.readFloatLE(0) < 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.readFloatBE(0));
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assert.equal(Infinity, buffer.readFloatLE(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] = 0xff;
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assert.equal(4.627507918739843e-41, buffer.readFloatBE(0));
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assert.equal(-Infinity, buffer.readFloatLE(0));
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}
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test(Buffer);
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