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'use strict';
module.exports = function (numberIsNaN, t) {
t.test('not NaN', function (st) {
st.test('primitives', function (sst) {
sst.notOk(numberIsNaN(), 'undefined is not NaN');
sst.notOk(numberIsNaN(null), 'null is not NaN');
sst.notOk(numberIsNaN(false), 'false is not NaN');
sst.notOk(numberIsNaN(true), 'true is not NaN');
sst.notOk(numberIsNaN(0), 'positive zero is not NaN');
sst.notOk(numberIsNaN(Infinity), 'Infinity is not NaN');
sst.notOk(numberIsNaN(-Infinity), '-Infinity is not NaN');
sst.notOk(numberIsNaN('foo'), 'string is not NaN');
sst.notOk(numberIsNaN('NaN'), 'string NaN is not NaN');
sst.end();
});
st.notOk(numberIsNaN([]), 'array is not NaN');
st.notOk(numberIsNaN({}), 'object is not NaN');
st.notOk(numberIsNaN(function () {}), 'function is not NaN');
st.test('valueOf', function (vt) {
var obj = {
valueOf: function () {
return NaN;
}
};
vt.ok(numberIsNaN(Number(obj)), 'object with valueOf of NaN, converted to Number, is NaN');
vt.notOk(numberIsNaN(obj), 'object with valueOf of NaN is not NaN');
vt.end();
});
st.end();
});
t.test('NaN literal', function (st) {
st.ok(numberIsNaN(NaN), 'NaN is NaN');
st.end();
});
};
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