import { isMaybeMermaidDefinition } from "./mermaid";

describe("isMaybeMermaidDefinition", () => {
  it("should return true for a valid mermaid definition", () => {
    expect(isMaybeMermaidDefinition("flowchart")).toBe(true);
    expect(isMaybeMermaidDefinition("flowchart LR")).toBe(true);
    expect(isMaybeMermaidDefinition("flowchart LR\nola")).toBe(true);
    expect(isMaybeMermaidDefinition("%%{}%%flowchart")).toBe(true);
    expect(isMaybeMermaidDefinition("%%{}%% flowchart")).toBe(true);

    expect(isMaybeMermaidDefinition("graphs")).toBe(false);
    expect(isMaybeMermaidDefinition("this flowchart")).toBe(false);
    expect(isMaybeMermaidDefinition("this\nflowchart")).toBe(false);
  });
});