feat(std/encoding): add base64 (#5811)

1 files changed, 47 insertions, 0 deletions

diff --git a/std/encoding/base64_test.ts b/std/encoding/base64_test.ts
new file mode 100644
index 000000000..bd559140a
--- /dev/null
+++ b/std/encoding/base64_test.ts
@@ -0,0 +1,47 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+
+const { test } = Deno;
+import { assertEquals } from "../testing/asserts.ts";
+import { encode, decode, decodeString } from "./base64.ts";
+
+const testsetString = [
+  ["", ""],
+  ["f", "Zg=="],
+  ["fo", "Zm8="],
+  ["foo", "Zm9v"],
+  ["foob", "Zm9vYg=="],
+  ["fooba", "Zm9vYmE="],
+  ["foobar", "Zm9vYmFy"],
+];
+
+const testsetBinary = [
+  [new TextEncoder().encode("\x00"), "AA=="],
+  [new TextEncoder().encode("\x00\x00"), "AAA="],
+  [new TextEncoder().encode("\x00\x00\x00"), "AAAA"],
+  [new TextEncoder().encode("\x00\x00\x00\x00"), "AAAAAA=="],
+];
+
+test("[encoding/base64] testBase64EncodeString", () => {
+  for (const [input, output] of testsetString) {
+    assertEquals(encode(input), output);
+  }
+});
+
+test("[encoding/base64] testBase64DecodeString", () => {
+  for (const [input, output] of testsetString) {
+    assertEquals(decodeString(output), input);
+  }
+});
+
+test("[encoding/base64] testBase64EncodeBinary", () => {
+  for (const [input, output] of testsetBinary) {
+    assertEquals(encode(input), output);
+  }
+});
+
+test("[encoding/base64] testBase64DecodeBinary", () => {
+  for (const [input, output] of testsetBinary) {
+    const outputBinary = new Uint8Array(decode(output as string));
+    assertEquals(outputBinary, input as Uint8Array);
+  }
+});