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// Ported from Go// https://github.com/golang/go/blob/go1.12.5/src/encoding/hex/hex.go// Copyright 2009 The Go Authors. All rights reserved.// Use of this source code is governed by a BSD-style// license that can be found in the LICENSE file.// Copyright 2018-2021 the Deno authors. All rights reserved. MIT license.import { assertEquals, assertThrows } from "../testing/asserts.ts";
import {  decode,  decodedLen,  decodeString,  encode,  encodedLen,  encodeToString,  errInvalidByte,  errLength,} from "./hex.ts";
function toByte(s: string): number {  return new TextEncoder().encode(s)[0];}
const testCases = [  // encoded(hex) / decoded(Uint8Array)  ["", []],  ["0001020304050607", [0, 1, 2, 3, 4, 5, 6, 7]],  ["08090a0b0c0d0e0f", [8, 9, 10, 11, 12, 13, 14, 15]],  ["f0f1f2f3f4f5f6f7", [0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7]],  ["f8f9fafbfcfdfeff", [0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff]],  ["67", Array.from(new TextEncoder().encode("g"))],  ["e3a1", [0xe3, 0xa1]],];
const errCases = [  // encoded(hex) / error  ["0", errLength()],  ["zd4aa", errInvalidByte(toByte("z"))],  ["d4aaz", errInvalidByte(toByte("z"))],  ["30313", errLength()],  ["0g", errInvalidByte(new TextEncoder().encode("g")[0])],  ["00gg", errInvalidByte(new TextEncoder().encode("g")[0])],  ["0\x01", errInvalidByte(new TextEncoder().encode("\x01")[0])],  ["ffeed", errLength()],];
Deno.test({  name: "[encoding.hex] encodedLen",  fn(): void {    assertEquals(encodedLen(0), 0);    assertEquals(encodedLen(1), 2);    assertEquals(encodedLen(2), 4);    assertEquals(encodedLen(3), 6);    assertEquals(encodedLen(4), 8);  },});
Deno.test({  name: "[encoding.hex] encode",  fn(): void {    {      const srcStr = "abc";      const src = new TextEncoder().encode(srcStr);      const dest = encode(src);      assertEquals(src, new Uint8Array([97, 98, 99]));      assertEquals(dest.length, 6);    }
    for (const [enc, dec] of testCases) {      const src = new Uint8Array(dec as number[]);      const dest = encode(src);      assertEquals(dest.length, src.length * 2);      assertEquals(new TextDecoder().decode(dest), enc);    }  },});
Deno.test({  name: "[encoding.hex] encodeToString",  fn(): void {    for (const [enc, dec] of testCases) {      assertEquals(encodeToString(new Uint8Array(dec as number[])), enc);    }  },});
Deno.test({  name: "[encoding.hex] decodedLen",  fn(): void {    assertEquals(decodedLen(0), 0);    assertEquals(decodedLen(2), 1);    assertEquals(decodedLen(4), 2);    assertEquals(decodedLen(6), 3);    assertEquals(decodedLen(8), 4);  },});
Deno.test({  name: "[encoding.hex] decode",  fn(): void {    // Case for decoding uppercase hex characters, since    // Encode always uses lowercase.    const extraTestcase = [      ["F8F9FAFBFCFDFEFF", [0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff]],    ];
    const cases = testCases.concat(extraTestcase);
    for (const [enc, dec] of cases) {      const src = new TextEncoder().encode(enc as string);      const dest = decode(src);      assertEquals(Array.from(dest), Array.from(dec as number[]));    }  },});
Deno.test({  name: "[encoding.hex] decodeString",  fn(): void {    for (const [enc, dec] of testCases) {      const dst = decodeString(enc as string);
      assertEquals(dec, Array.from(dst));    }  },});
Deno.test({  name: "[encoding.hex] decode error",  fn(): void {    for (const [input, expectedErr] of errCases) {      assertThrows(        () => decode(new TextEncoder().encode(input as string)),        Error,        (expectedErr as Error).message,      );    }  },});
Deno.test({  name: "[encoding.hex] decodeString error",  fn(): void {    for (const [input, expectedErr] of errCases) {      assertThrows(        (): void => {          decodeString(input as string);        },        Error,        (expectedErr as Error).message,      );    }  },});