import columnletter from "../src/columnletter";
import { ERRORTYPES as error } from "../src/error";
import test from "tape";
test("columnletter", function(t) {
t.plan(5);
t.equal(columnletter(0), "A");
t.equal(columnletter(25), "Z");
t.equal(columnletter(26), "AA");
t.equal(columnletter(NaN), error.value);
t.equal(columnletter("invalid"), error.value);
});