100 lines
3.0 KiB
JavaScript
100 lines
3.0 KiB
JavaScript
var tape = require("tape");
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var float = require("..");
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tape.test("float", function(test) {
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// default
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test.test(test.name + " - typed array", function(test) {
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runTest(float, test);
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});
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// ieee754
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test.test(test.name + " - fallback", function(test) {
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var F32 = global.Float32Array,
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F64 = global.Float64Array;
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delete global.Float32Array;
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delete global.Float64Array;
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runTest(float({}), test);
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global.Float32Array = F32;
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global.Float64Array = F64;
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});
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});
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function runTest(float, test) {
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var common = [
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0,
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-0,
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Infinity,
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-Infinity,
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0.125,
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1024.5,
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-4096.5,
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NaN
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];
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test.test(test.name + " - using 32 bits", function(test) {
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common.concat([
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3.4028234663852886e+38,
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1.1754943508222875e-38,
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1.1754946310819804e-39
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])
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.forEach(function(value) {
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var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
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test.ok(
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checkValue(value, 4, float.readFloatLE, float.writeFloatLE, Buffer.prototype.writeFloatLE),
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"should write and read back " + strval + " (32 bit LE)"
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);
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test.ok(
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checkValue(value, 4, float.readFloatBE, float.writeFloatBE, Buffer.prototype.writeFloatBE),
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"should write and read back " + strval + " (32 bit BE)"
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);
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});
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test.end();
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});
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test.test(test.name + " - using 64 bits", function(test) {
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common.concat([
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1.7976931348623157e+308,
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2.2250738585072014e-308,
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2.2250738585072014e-309
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])
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.forEach(function(value) {
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var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
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test.ok(
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checkValue(value, 8, float.readDoubleLE, float.writeDoubleLE, Buffer.prototype.writeDoubleLE),
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"should write and read back " + strval + " (64 bit LE)"
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);
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test.ok(
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checkValue(value, 8, float.readDoubleBE, float.writeDoubleBE, Buffer.prototype.writeDoubleBE),
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"should write and read back " + strval + " (64 bit BE)"
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);
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});
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test.end();
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});
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test.end();
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}
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function checkValue(value, size, read, write, write_comp) {
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var buffer = new Buffer(size);
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write(value, buffer, 0);
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var value_comp = read(buffer, 0);
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var strval = value === 0 && 1 / value < 0 ? "-0" : value.toString();
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if (value !== value) {
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if (value_comp === value_comp)
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return false;
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} else if (value_comp !== value)
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return false;
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var buffer_comp = new Buffer(size);
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write_comp.call(buffer_comp, value, 0);
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for (var i = 0; i < size; ++i)
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if (buffer[i] !== buffer_comp[i]) {
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console.error(">", buffer, buffer_comp);
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return false;
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}
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return true;
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} |