Added test package in nix flake to automatically run tests.

To be able to do such, it was required to add the vendor directory
to the git project.

vendor/deno.land/x/base64@v0.2.1/base.ts

@@ -0,0 +1,136 @@
+function getLengths(b64: string): [number, number] {
+  const len: number = b64.length;
+
+  // if (len % 4 > 0) {
+  //   throw new TypeError("Invalid string. Length must be a multiple of 4");
+  // }
+
+  // Trim off extra bytes after placeholder bytes are found
+  // See: https://github.com/beatgammit/base64-js/issues/42
+  let validLen: number = b64.indexOf("=");
+
+  if (validLen === -1) {
+    validLen = len;
+  }
+
+  const placeHoldersLen: number = validLen === len ? 0 : 4 - (validLen % 4);
+
+  return [validLen, placeHoldersLen];
+}
+
+export function init(
+  lookup: string[],
+  revLookup: number[],
+  urlsafe: boolean = false,
+) {
+  function _byteLength(validLen: number, placeHoldersLen: number): number {
+    return Math.floor(((validLen + placeHoldersLen) * 3) / 4 - placeHoldersLen);
+  }
+
+  function tripletToBase64(num: number): string {
+    return (
+      lookup[(num >> 18) & 0x3f] +
+      lookup[(num >> 12) & 0x3f] +
+      lookup[(num >> 6) & 0x3f] +
+      lookup[num & 0x3f]
+    );
+  }
+
+  function encodeChunk(buf: Uint8Array, start: number, end: number): string {
+    const out: string[] = new Array((end - start) / 3);
+
+    for (let i: number = start, curTriplet: number = 0; i < end; i += 3) {
+      out[curTriplet++] = tripletToBase64(
+        (buf[i] << 16) + (buf[i + 1] << 8) + buf[i + 2],
+      );
+    }
+
+    return out.join("");
+  }
+
+  return {
+    // base64 is 4/3 + up to two characters of the original data
+    byteLength(b64: string): number {
+      return _byteLength.apply(null, getLengths(b64));
+    },
+    toUint8Array(b64: string): Uint8Array {
+      const [validLen, placeHoldersLen]: number[] = getLengths(b64);
+
+      const buf = new Uint8Array(_byteLength(validLen, placeHoldersLen));
+
+      // If there are placeholders, only get up to the last complete 4 chars
+      const len: number = placeHoldersLen ? validLen - 4 : validLen;
+
+      let tmp: number;
+      let curByte: number = 0;
+      let i: number;
+
+      for (i = 0; i < len; i += 4) {
+        tmp = (revLookup[b64.charCodeAt(i)] << 18) |
+          (revLookup[b64.charCodeAt(i + 1)] << 12) |
+          (revLookup[b64.charCodeAt(i + 2)] << 6) |
+          revLookup[b64.charCodeAt(i + 3)];
+        buf[curByte++] = (tmp >> 16) & 0xff;
+        buf[curByte++] = (tmp >> 8) & 0xff;
+        buf[curByte++] = tmp & 0xff;
+      }
+
+      if (placeHoldersLen === 2) {
+        tmp = (revLookup[b64.charCodeAt(i)] << 2) |
+          (revLookup[b64.charCodeAt(i + 1)] >> 4);
+        buf[curByte++] = tmp & 0xff;
+      } else if (placeHoldersLen === 1) {
+        tmp = (revLookup[b64.charCodeAt(i)] << 10) |
+          (revLookup[b64.charCodeAt(i + 1)] << 4) |
+          (revLookup[b64.charCodeAt(i + 2)] >> 2);
+        buf[curByte++] = (tmp >> 8) & 0xff;
+        buf[curByte++] = tmp & 0xff;
+      }
+
+      return buf;
+    },
+    fromUint8Array(buf: Uint8Array): string {
+      const maxChunkLength: number = 16383; // Must be multiple of 3
+
+      const len: number = buf.length;
+
+      const extraBytes: number = len % 3; // If we have 1 byte left, pad 2 bytes
+
+      const len2: number = len - extraBytes;
+
+      const parts: string[] = new Array(
+        Math.ceil(len2 / maxChunkLength) + (extraBytes ? 1 : 0),
+      );
+
+      let curChunk: number = 0;
+      let chunkEnd: number;
+
+      // Go through the array every three bytes, we'll deal with trailing stuff later
+      for (let i: number = 0; i < len2; i += maxChunkLength) {
+        chunkEnd = i + maxChunkLength;
+        parts[curChunk++] = encodeChunk(
+          buf,
+          i,
+          chunkEnd > len2 ? len2 : chunkEnd,
+        );
+      }
+
+      let tmp: number;
+
+      // Pad the end with zeros, but make sure to not forget the extra bytes
+      if (extraBytes === 1) {
+        tmp = buf[len2];
+        parts[curChunk] = lookup[tmp >> 2] + lookup[(tmp << 4) & 0x3f];
+        if (!urlsafe) parts[curChunk] += "==";
+      } else if (extraBytes === 2) {
+        tmp = (buf[len2] << 8) | (buf[len2 + 1] & 0xff);
+        parts[curChunk] = lookup[tmp >> 10] +
+          lookup[(tmp >> 4) & 0x3f] +
+          lookup[(tmp << 2) & 0x3f];
+        if (!urlsafe) parts[curChunk] += "=";
+      }
+
+      return parts.join("");
+    },
+  };
+}

vendor/deno.land/x/base64@v0.2.1/base64url.ts

@@ -0,0 +1,17 @@
+import { init } from "./base.ts";
+
+const lookup: string[] = [];
+const revLookup: number[] = [];
+const code: string =
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
+
+for (let i: number = 0, l = code.length; i < l; ++i) {
+  lookup[i] = code[i];
+  revLookup[code.charCodeAt(i)] = i;
+}
+
+export const { byteLength, toUint8Array, fromUint8Array } = init(
+  lookup,
+  revLookup,
+  true,
+);

vendor/deno.land/x/base64@v0.2.1/mod.ts

@@ -0,0 +1,21 @@
+import { init } from "./base.ts";
+
+const lookup: string[] = [];
+const revLookup: number[] = [];
+const code: string =
+  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+for (let i: number = 0, l = code.length; i < l; ++i) {
+  lookup[i] = code[i];
+  revLookup[code.charCodeAt(i)] = i;
+}
+
+// Support decoding URL-safe base64 strings, as Node.js does.
+// See: https://en.wikipedia.org/wiki/Base64#URL_applications
+revLookup["-".charCodeAt(0)] = 62;
+revLookup["_".charCodeAt(0)] = 63;
+
+export const { byteLength, toUint8Array, fromUint8Array } = init(
+  lookup,
+  revLookup,
+);