import { trendColorClass } from "../stat-card";

describe("trendColorClass", () => {
  it("colours an upward trend with the success token", () => {
    expect(trendColorClass("up")).toContain("text-success");
  });

  it("colours a downward trend with the destructive token", () => {
    expect(trendColorClass("down")).toContain("text-destructive");
  });

  it("falls back to muted for a neutral trend", () => {
    expect(trendColorClass("neutral")).toContain("text-muted-foreground");
  });

  it("uses only palette tokens, never raw hex", () => {
    for (const trend of ["up", "down", "neutral"] as const) {
      expect(trendColorClass(trend)).not.toMatch(/#[0-9a-fA-F]{3,8}/);
    }
  });
});