import { describe, expect, it } from "vitest";
import { emailFromOidcProfile } from "@/lib/auth/oidc";

describe("emailFromOidcProfile", () => {
  it("reads email claim", () => {
    expect(emailFromOidcProfile({ email: "Nick@Example.com" })).toBe(
      "nick@example.com"
    );
  });

  it("falls back to preferred_username when it looks like an email", () => {
    expect(
      emailFromOidcProfile({ preferred_username: "nick@example.com" })
    ).toBe("nick@example.com");
  });

  it("ignores non-email preferred_username", () => {
    expect(emailFromOidcProfile({ preferred_username: "nick" })).toBeNull();
  });

  it("returns null when nothing usable is present", () => {
    expect(emailFromOidcProfile({ sub: "abc", name: "Nick" })).toBeNull();
  });
});