import "jest";
import { StringOrTBuilder } from "../StringOrTBuilder";

describe(StringOrTBuilder.name, () => {
  it("merges adjacent strings", () => {
    const builder = new StringOrTBuilder();
    builder.push("hello");
    builder.push(" ");
    builder.push("world");
    expect(builder.items).toMatchObject(["hello world"]);
  });

  it("does not merge strings across T boundaries", () => {
    const builder = new StringOrTBuilder<null>();
    builder.push("hello");
    builder.push(null);
    builder.push("world");
    expect(builder.items).toMatchObject(["hello", null, "world"]);
  });
});