// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license. import { assert, assertEquals, assertStringIncludes } from "./test_util.ts"; import { concat } from "@std/bytes/concat"; Deno.test(function blobString() { const b1 = new Blob(["Hello World"]); const str = "Test"; const b2 = new Blob([b1, str]); assertEquals(b2.size, b1.size + str.length); }); Deno.test(function blobBuffer() { const buffer = new ArrayBuffer(12); const u8 = new Uint8Array(buffer); const f1 = new Float32Array(buffer); const b1 = new Blob([buffer, u8]); assertEquals(b1.size, 2 * u8.length); const b2 = new Blob([b1, f1]); assertEquals(b2.size, 3 * u8.length); }); Deno.test(function blobSlice() { const blob = new Blob(["Deno", "Foo"]); const b1 = blob.slice(0, 3, "Text/HTML"); assert(b1 instanceof Blob); assertEquals(b1.size, 3); assertEquals(b1.type, "text/html"); const b2 = blob.slice(-1, 3); assertEquals(b2.size, 0); const b3 = blob.slice(100, 3); assertEquals(b3.size, 0); const b4 = blob.slice(0, 10); assertEquals(b4.size, blob.size); }); Deno.test(function blobInvalidType() { const blob = new Blob(["foo"], { type: "\u0521", }); assertEquals(blob.type, ""); }); Deno.test(function blobShouldNotThrowError() { let hasThrown = false; try { // deno-lint-ignore no-explicit-any const options1: any = { ending: "utf8", hasOwnProperty: "hasOwnProperty", }; const options2 = Object.create(null); new Blob(["Hello World"], options1); new Blob(["Hello World"], options2); } catch { hasThrown = true; } assertEquals(hasThrown, false); }); /* TODO https://github.com/denoland/deno/issues/7540 Deno.test(function nativeEndLine() { const options = { ending: "native", } as const; const blob = new Blob(["Hello\nWorld"], options); assertEquals(blob.size, Deno.build.os === "windows" ? 12 : 11); }); */ Deno.test(async function blobText() { const blob = new Blob(["Hello World"]); assertEquals(await blob.text(), "Hello World"); }); Deno.test(async function blobStream() { const blob = new Blob(["Hello World"]); const stream = blob.stream(); assert(stream instanceof ReadableStream); const reader = stream.getReader(); let bytes = new Uint8Array(); const read = async (): Promise<void> => { const { done, value } = await reader.read(); if (!done && value) { bytes = concat([bytes, value]); return read(); } }; await read(); const decoder = new TextDecoder(); assertEquals(decoder.decode(bytes), "Hello World"); }); Deno.test(async function blobArrayBuffer() { const uint = new Uint8Array([102, 111, 111]); const blob = new Blob([uint]); assertEquals(await blob.arrayBuffer(), uint.buffer); }); Deno.test(function blobConstructorNameIsBlob() { const blob = new Blob(); assertEquals(blob.constructor.name, "Blob"); }); Deno.test(function blobCustomInspectFunction() { const blob = new Blob(); assertEquals( Deno.inspect(blob), `Blob { size: 0, type: "" }`, ); assertStringIncludes(Deno.inspect(Blob.prototype), "Blob"); });