You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 
 

106 lines
3.2 KiB

/*
* Tests to verify we're writing doubles correctly
*/
var ASSERT = require('assert');
function test() {
var buffer = new Buffer(16);
buffer.writeDoubleBE(2.225073858507201e-308, 0);
buffer.writeDoubleLE(2.225073858507201e-308, 8);
ASSERT.equal(0x00, buffer[0]);
ASSERT.equal(0x0f, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
ASSERT.equal(0xff, buffer[3]);
ASSERT.equal(0xff, buffer[4]);
ASSERT.equal(0xff, buffer[5]);
ASSERT.equal(0xff, buffer[6]);
ASSERT.equal(0xff, buffer[7]);
ASSERT.equal(0xff, buffer[8]);
ASSERT.equal(0xff, buffer[9]);
ASSERT.equal(0xff, buffer[10]);
ASSERT.equal(0xff, buffer[11]);
ASSERT.equal(0xff, buffer[12]);
ASSERT.equal(0xff, buffer[13]);
ASSERT.equal(0x0f, buffer[14]);
ASSERT.equal(0x00, buffer[15]);
buffer.writeDoubleBE(1.0000000000000004, 0);
buffer.writeDoubleLE(1.0000000000000004, 8);
ASSERT.equal(0x3f, buffer[0]);
ASSERT.equal(0xf0, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
ASSERT.equal(0x00, buffer[3]);
ASSERT.equal(0x00, buffer[4]);
ASSERT.equal(0x00, buffer[5]);
ASSERT.equal(0x00, buffer[6]);
ASSERT.equal(0x02, buffer[7]);
ASSERT.equal(0x02, buffer[8]);
ASSERT.equal(0x00, buffer[9]);
ASSERT.equal(0x00, buffer[10]);
ASSERT.equal(0x00, buffer[11]);
ASSERT.equal(0x00, buffer[12]);
ASSERT.equal(0x00, buffer[13]);
ASSERT.equal(0xf0, buffer[14]);
ASSERT.equal(0x3f, buffer[15]);
buffer.writeDoubleBE(-2, 0);
buffer.writeDoubleLE(-2, 8);
ASSERT.equal(0xc0, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
ASSERT.equal(0x00, buffer[3]);
ASSERT.equal(0x00, buffer[4]);
ASSERT.equal(0x00, buffer[5]);
ASSERT.equal(0x00, buffer[6]);
ASSERT.equal(0x00, buffer[7]);
ASSERT.equal(0x00, buffer[8]);
ASSERT.equal(0x00, buffer[9]);
ASSERT.equal(0x00, buffer[10]);
ASSERT.equal(0x00, buffer[11]);
ASSERT.equal(0x00, buffer[12]);
ASSERT.equal(0x00, buffer[13]);
ASSERT.equal(0x00, buffer[14]);
ASSERT.equal(0xc0, buffer[15]);
buffer.writeDoubleBE(1.7976931348623157e+308, 0);
buffer.writeDoubleLE(1.7976931348623157e+308, 8);
ASSERT.equal(0x7f, buffer[0]);
ASSERT.equal(0xef, buffer[1]);
ASSERT.equal(0xff, buffer[2]);
ASSERT.equal(0xff, buffer[3]);
ASSERT.equal(0xff, buffer[4]);
ASSERT.equal(0xff, buffer[5]);
ASSERT.equal(0xff, buffer[6]);
ASSERT.equal(0xff, buffer[7]);
ASSERT.equal(0xff, buffer[8]);
ASSERT.equal(0xff, buffer[9]);
ASSERT.equal(0xff, buffer[10]);
ASSERT.equal(0xff, buffer[11]);
ASSERT.equal(0xff, buffer[12]);
ASSERT.equal(0xff, buffer[13]);
ASSERT.equal(0xef, buffer[14]);
ASSERT.equal(0x7f, buffer[15]);
buffer.writeDoubleBE(0 * -1, 0);
buffer.writeDoubleLE(0 * -1, 8);
ASSERT.equal(0x80, buffer[0]);
ASSERT.equal(0x00, buffer[1]);
ASSERT.equal(0x00, buffer[2]);
ASSERT.equal(0x00, buffer[3]);
ASSERT.equal(0x00, buffer[4]);
ASSERT.equal(0x00, buffer[5]);
ASSERT.equal(0x00, buffer[6]);
ASSERT.equal(0x00, buffer[7]);
ASSERT.equal(0x00, buffer[8]);
ASSERT.equal(0x00, buffer[9]);
ASSERT.equal(0x00, buffer[10]);
ASSERT.equal(0x00, buffer[11]);
ASSERT.equal(0x00, buffer[12]);
ASSERT.equal(0x00, buffer[13]);
ASSERT.equal(0x00, buffer[14]);
ASSERT.equal(0x80, buffer[15]);
}
test();