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109 lines
2.9 KiB
109 lines
2.9 KiB
'use strict';
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/*
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* Tests to verify we're reading in doubles 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 (64 bit) double
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*/
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function test(clazz) {
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const buffer = new clazz(8);
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buffer[0] = 0x55;
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buffer[1] = 0x55;
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buffer[2] = 0x55;
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buffer[3] = 0x55;
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buffer[4] = 0x55;
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buffer[5] = 0x55;
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buffer[6] = 0xd5;
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buffer[7] = 0x3f;
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assert.strictEqual(1.1945305291680097e+103, buffer.readDoubleBE(0));
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assert.strictEqual(0.3333333333333333, buffer.readDoubleLE(0));
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buffer[0] = 1;
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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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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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assert.strictEqual(7.291122019655968e-304, buffer.readDoubleBE(0));
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assert.strictEqual(1.0000000000000002, buffer.readDoubleLE(0));
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buffer[0] = 2;
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assert.strictEqual(4.778309726801735e-299, buffer.readDoubleBE(0));
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assert.strictEqual(1.0000000000000004, buffer.readDoubleLE(0));
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buffer[0] = 1;
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buffer[6] = 0;
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buffer[7] = 0;
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assert.strictEqual(7.291122019556398e-304, buffer.readDoubleBE(0));
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assert.strictEqual(5e-324, buffer.readDoubleLE(0));
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buffer[0] = 0xff;
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buffer[1] = 0xff;
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buffer[2] = 0xff;
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buffer[3] = 0xff;
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buffer[4] = 0xff;
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buffer[5] = 0xff;
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buffer[6] = 0x0f;
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buffer[7] = 0x00;
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assert.ok(isNaN(buffer.readDoubleBE(0)));
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assert.strictEqual(2.225073858507201e-308, buffer.readDoubleLE(0));
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buffer[6] = 0xef;
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buffer[7] = 0x7f;
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assert.ok(isNaN(buffer.readDoubleBE(0)));
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assert.strictEqual(1.7976931348623157e+308, buffer.readDoubleLE(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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buffer[4] = 0;
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buffer[5] = 0;
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buffer[6] = 0xf0;
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buffer[7] = 0x3f;
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assert.strictEqual(3.03865e-319, buffer.readDoubleBE(0));
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assert.strictEqual(1, buffer.readDoubleLE(0));
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buffer[6] = 0;
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buffer[7] = 0x40;
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assert.strictEqual(3.16e-322, buffer.readDoubleBE(0));
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assert.strictEqual(2, buffer.readDoubleLE(0));
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buffer[7] = 0xc0;
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assert.strictEqual(9.5e-322, buffer.readDoubleBE(0));
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assert.strictEqual(-2, buffer.readDoubleLE(0));
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buffer[6] = 0x10;
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buffer[7] = 0;
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assert.strictEqual(2.0237e-320, buffer.readDoubleBE(0));
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assert.strictEqual(2.2250738585072014e-308, buffer.readDoubleLE(0));
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buffer[6] = 0;
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assert.strictEqual(0, buffer.readDoubleBE(0));
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assert.strictEqual(0, buffer.readDoubleLE(0));
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assert.strictEqual(false, 1 / buffer.readDoubleLE(0) < 0);
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buffer[7] = 0x80;
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assert.strictEqual(6.3e-322, buffer.readDoubleBE(0));
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assert.strictEqual(0, buffer.readDoubleLE(0));
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assert.strictEqual(true, 1 / buffer.readDoubleLE(0) < 0);
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buffer[6] = 0xf0;
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buffer[7] = 0x7f;
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assert.strictEqual(3.0418e-319, buffer.readDoubleBE(0));
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assert.strictEqual(Infinity, buffer.readDoubleLE(0));
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buffer[6] = 0xf0;
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buffer[7] = 0xff;
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assert.strictEqual(3.04814e-319, buffer.readDoubleBE(0));
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assert.strictEqual(-Infinity, buffer.readDoubleLE(0));
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}
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test(Buffer);
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