Noam Rosenthal
e0757fcf9d
Automatic update from web-platform-tests Un-tentative `textStream()` tests (for `Blob` and `Body`) (#60356) * Un-tentative textStream() tests See https://github.com/w3c/FileAPI/pull/221 and https://github.com/whatwg/fetch/pull/1862 * Added some tests for null body -- wpt-commits: 15694f7be1515a179dff1cdc7ba42189d795d9d4 wpt-pr: 60356
91 lines
3.3 KiB
JavaScript
91 lines
3.3 KiB
JavaScript
// META: title=Blob textStream
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// META: global=window,worker
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// META: script=../support/Blob.js
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'use strict';
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async function readAllChunks(stream) {
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const reader = stream.getReader();
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const chunks = [];
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while (true) {
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const {done, value} = await reader.read();
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if (done) {
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break;
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}
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chunks.push(value);
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}
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return chunks;
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}
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test(() => {
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assert_true('textStream' in Blob.prototype, "textStream exists on Blob.prototype");
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assert_equals(typeof Blob.prototype.textStream, "function", "Blob.prototype.textStream is a function");
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}, "textStream method existence");
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promise_test(async () => {
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const blob = new Blob(["hello world"]);
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const stream = blob.textStream();
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assert_true(stream instanceof ReadableStream, "textStream() returns a ReadableStream");
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const chunks = await readAllChunks(stream);
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assert_greater_than(chunks.length, 0);
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for (const chunk of chunks) {
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assert_equals(typeof chunk, "string", "each chunk should be a string");
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}
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assert_equals(chunks.join(""), "hello world", "concatenated chunks match the blob content");
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}, "Blob.textStream() basic functionality");
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promise_test(async () => {
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const blob = new Blob();
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const stream = blob.textStream();
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assert_true(stream instanceof ReadableStream);
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const chunks = await readAllChunks(stream);
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assert_equals(chunks.length, 0, "no chunks should be read from empty blob textStream");
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}, "Blob.textStream() with empty blob");
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promise_test(async () => {
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const blob = new Blob(["hello ", "world"]);
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const stream = blob.textStream();
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const chunks = await readAllChunks(stream);
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assert_equals(chunks.join(""), "hello world");
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}, "Blob.textStream() with multi-part blob");
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promise_test(async () => {
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const buffer = new Uint8Array([0x68, 0x00, 0x65, 0x00, 0x6c, 0x00, 0x6c, 0x00, 0x6f, 0x00]); // "hello" in UTF-16LE
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const blob = new Blob([buffer], {
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type: "text/plain; charset=utf-16le"
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});
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const stream = blob.textStream();
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const chunks = await readAllChunks(stream);
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assert_equals(chunks.join(""), "h\0e\0l\0l\0o\0", "ignores charset=utf-16le type parameter");
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}, "Blob.textStream() ignores type charset (UTF-16LE)");
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promise_test(async () => {
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const blob = new Blob([new TextEncoder().encode("hello")], {
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type: "text/plain; charset=invalid-charset"
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});
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const stream = blob.textStream();
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const chunks = await readAllChunks(stream);
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assert_equals(chunks.join(""), "hello", "ignores invalid-charset type parameter and decodes as UTF-8");
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}, "Blob.textStream() ignores invalid type charset (invalid-charset)");
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promise_test(async () => {
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const blob = new Blob([new TextEncoder().encode("é")], {
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type: "text/plain; charset=iso-8859-1"
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});
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const stream = blob.textStream();
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const chunks = await readAllChunks(stream);
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assert_equals(chunks.join(""), "é", "ignores charset=iso-8859-1 type parameter and decodes as UTF-8");
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}, "Blob.textStream() ignores type charset (iso-8859-1)");
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promise_test(async () => {
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const blob = new Blob(["hello"]);
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const stream1 = blob.textStream();
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const stream2 = blob.textStream();
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assert_not_equals(stream1, stream2, "multiple calls return new streams");
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const chunks1 = await readAllChunks(stream1);
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const chunks2 = await readAllChunks(stream2);
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assert_equals(chunks1.join(""), "hello");
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assert_equals(chunks2.join(""), "hello");
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}, "Blob.textStream() can be called multiple times");
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