tra-analysis/website/functions/node_modules/@protobufjs/float/tests/index.js
2019-01-06 13:14:45 -06:00

100 lines
2.9 KiB
JavaScript

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