import "jest";
import { ellipsifyEnd, ellipsifyStart } from "../ellipsify";

describe(ellipsifyEnd.name, () => {
  it("returns string as-is when it is within length", () => {
    expect(ellipsifyEnd("foo", 3)).toBe("foo");
    expect(ellipsifyEnd("fo", 3)).toBe("fo");
    expect(ellipsifyEnd("f", 3)).toBe("f");
    expect(ellipsifyEnd("", 3)).toBe("");
  });

  it("uses an ellipsis to truncate the end when over length", () => {
    expect(ellipsifyEnd("foobar", 3)).toBe("fo…");
    expect(ellipsifyEnd("fooba", 3)).toBe("fo…");
    expect(ellipsifyEnd("foob", 3)).toBe("fo…");
  });
});

describe(ellipsifyStart.name, () => {
  it("returns string as-is when it is within length", () => {
    expect(ellipsifyStart("foo", 3)).toBe("foo");
    expect(ellipsifyStart("fo", 3)).toBe("fo");
    expect(ellipsifyStart("f", 3)).toBe("f");
    expect(ellipsifyStart("", 3)).toBe("");
  });

  it("uses an ellipsis to truncate the start when over length", () => {
    expect(ellipsifyStart("foobar", 3)).toBe("…ar");
    expect(ellipsifyStart("fooba", 3)).toBe("…ba");
    expect(ellipsifyStart("foob", 3)).toBe("…ob");
  });

  it("handles length=2", () => {
    expect(ellipsifyStart("foo", 2)).toBe("…o");
    expect(ellipsifyStart("fo", 2)).toBe("fo");
    expect(ellipsifyStart("f", 2)).toBe("f");
  });

  it("handles length=1", () => {
    expect(ellipsifyStart("foo", 1)).toBe("…");
    expect(ellipsifyStart("fo", 1)).toBe("…");
    expect(ellipsifyStart("f", 1)).toBe("f");
  });

  it("handles length=0", () => {
    expect(ellipsifyStart("foo", 0)).toBe("");
    expect(ellipsifyStart("fo", 0)).toBe("");
    expect(ellipsifyStart("f", 0)).toBe("");
  });
});