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92 lines
2.9 KiB
92 lines
2.9 KiB
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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'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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const 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.strictEqual(4.600602988224807e-41, buffer.readFloatBE(0));
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assert.strictEqual(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.strictEqual(2.6904930515036488e-43, buffer.readFloatBE(0));
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assert.strictEqual(-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.strictEqual(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.strictEqual(-1.2126478207002966e-12, buffer.readFloatBE(0));
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assert.strictEqual(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.strictEqual(0, buffer.readFloatBE(0));
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assert.strictEqual(0, buffer.readFloatLE(0));
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assert.strictEqual(false, 1 / buffer.readFloatLE(0) < 0);
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buffer[3] = 0x80;
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assert.strictEqual(1.793662034335766e-43, buffer.readFloatBE(0));
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assert.strictEqual(0, buffer.readFloatLE(0));
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assert.strictEqual(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.strictEqual(4.609571298396486e-41, buffer.readFloatBE(0));
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assert.strictEqual(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.strictEqual(4.627507918739843e-41, buffer.readFloatBE(0));
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assert.strictEqual(-Infinity, buffer.readFloatLE(0));
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}
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test(Buffer);
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