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std/bytes/test.ts

Deno standard library
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { findIndex, findLastIndex, equal, hasPrefix, repeat, concat,} from "./mod.ts";import { assertEquals, assertThrows, assert } from "../testing/asserts.ts";import { encode, decode } from "../encoding/utf8.ts";
Deno.test("[bytes] findIndex1", () => { const i = findIndex( new Uint8Array([1, 2, 0, 1, 2, 0, 1, 2, 0, 1, 3]), new Uint8Array([0, 1, 2]) ); assertEquals(i, 2);});
Deno.test("[bytes] findIndex2", () => { const i = findIndex(new Uint8Array([0, 0, 1]), new Uint8Array([0, 1])); assertEquals(i, 1);});
Deno.test("[bytes] findLastIndex1", () => { const i = findLastIndex( new Uint8Array([0, 1, 2, 0, 1, 2, 0, 1, 3]), new Uint8Array([0, 1, 2]) ); assertEquals(i, 3);});
Deno.test("[bytes] findLastIndex2", () => { const i = findLastIndex(new Uint8Array([0, 1, 1]), new Uint8Array([0, 1])); assertEquals(i, 0);});
Deno.test("[bytes] equal", () => { const v = equal(new Uint8Array([0, 1, 2, 3]), new Uint8Array([0, 1, 2, 3])); assertEquals(v, true);});
Deno.test("[bytes] hasPrefix", () => { const v = hasPrefix(new Uint8Array([0, 1, 2]), new Uint8Array([0, 1])); assertEquals(v, true);});
Deno.test("[bytes] repeat", () => { // input / output / count / error message const repeatTestCase = [ ["", "", 0], ["", "", 1], ["", "", 1.1, "bytes: repeat count must be an integer"], ["", "", 2], ["", "", 0], ["-", "", 0], ["-", "-", -1, "bytes: negative repeat count"], ["-", "----------", 10], ["abc ", "abc abc abc ", 3], ]; for (const [input, output, count, errMsg] of repeatTestCase) { if (errMsg) { assertThrows( (): void => { repeat(new TextEncoder().encode(input as string), count as number); }, Error, errMsg as string ); } else { const newBytes = repeat( new TextEncoder().encode(input as string), count as number );
assertEquals(new TextDecoder().decode(newBytes), output); } }});
Deno.test("[bytes] concat", () => { const u1 = encode("Hello "); const u2 = encode("World"); const joined = concat(u1, u2); assertEquals(decode(joined), "Hello World"); assert(u1 !== joined); assert(u2 !== joined);});
Deno.test("[bytes] concat empty arrays", () => { const u1 = new Uint8Array(); const u2 = new Uint8Array(); const joined = concat(u1, u2); assertEquals(joined.byteLength, 0); assert(u1 !== joined); assert(u2 !== joined);});