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import { describe, expect, it } from "vitest";
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import { base64UrlDecode, base64UrlEncode } from "@/lib/encoding";
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describe("base64UrlEncode", () => {
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  it("produces URL-safe alphabet with no padding", () => {
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    const bytes = new Uint8Array([0xfb, 0xff, 0x00, 0xfa]);
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    const encoded = base64UrlEncode(bytes);
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    expect(encoded).not.toMatch(/[+/=]/);
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    expect(encoded).toMatch(/^[A-Za-z0-9_-]+$/);
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  });
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  it("round-trips arbitrary byte sequences", () => {
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    const bytes = crypto.getRandomValues(new Uint8Array(33));
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    const decoded = base64UrlDecode(base64UrlEncode(bytes));
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    expect(decoded).toEqual(bytes);
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  });
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  it("round-trips empty input", () => {
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    const encoded = base64UrlEncode(new Uint8Array());
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    expect(encoded).toBe("");
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    expect(base64UrlDecode("")).toEqual(new Uint8Array());
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  });
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});
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describe("base64UrlDecode", () => {
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  it("accepts inputs across every modulo-4 length", () => {
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    for (const len of [1, 2, 3, 4, 5]) {
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      const bytes = crypto.getRandomValues(new Uint8Array(len));
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      expect(base64UrlDecode(base64UrlEncode(bytes))).toEqual(bytes);
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    }
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  });
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});