import { expect } from "chai";
import pathExtensionPosition from "./pathExtensionPosition";

describe("pathExtensionPosition", () => {
  it("returns the index of the dot of the extension", () => {
    expect(pathExtensionPosition(".", "/")).to.equal(0);
    expect(pathExtensionPosition(".c", "/")).to.equal(0);
    expect(pathExtensionPosition("a.", "/")).to.equal(1);
    expect(pathExtensionPosition("a.c", "/")).to.equal(1);
  });

  it("returns -1 when there's no extension", () => {
    expect(pathExtensionPosition("", "/")).to.equal(-1);
    expect(pathExtensionPosition("a", "/")).to.equal(-1);
  });

  it("should get the extension of the last component only", () => {
    expect(pathExtensionPosition("/a.b/", "/")).to.equal(-1);
    expect(pathExtensionPosition("/a.b/..d", "/")).to.equal(6);
    expect(pathExtensionPosition("/a.b/.c.d", "/")).to.equal(7);
    expect(pathExtensionPosition("/a.b/.d", "/")).to.equal(5);
    expect(pathExtensionPosition("/a.b/c", "/")).to.equal(-1);
    expect(pathExtensionPosition("/a.b/c.d", "/")).to.equal(6);
    expect(pathExtensionPosition("/a.b/c.d", "/")).to.equal(6);
    expect(pathExtensionPosition("/a.b/c.d.e", "/")).to.equal(8);
    expect(pathExtensionPosition("a.b/", "/")).to.equal(-1);
    expect(pathExtensionPosition("a.b/.c", "/")).to.equal(4);
    expect(pathExtensionPosition("a.b/c.", "/")).to.equal(5);
    expect(pathExtensionPosition("a.b/c.d", "/")).to.equal(5);
  });
});