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denoland-deno/tests/unit/io_test.ts
Matt Mastracci f5e46c9bf2
chore: move cli/tests/ -> tests/ (#22369)
This looks like a massive PR, but it's only a move from cli/tests ->
tests, and updates of relative paths for files.

This is the first step towards aggregate all of the integration test
files under tests/, which will lead to a set of integration tests that
can run without the CLI binary being built.

While we could leave these tests under `cli`, it would require us to
keep a more complex directory structure for the various test runners. In
addition, we have a lot of complexity to ignore various test files in
the `cli` project itself (cargo publish exclusion rules, autotests =
false, etc).

And finally, the `tests/` folder will eventually house the `test_ffi`,
`test_napi` and other testing code, reducing the size of the root repo
directory.

For easier review, the extremely large and noisy "move" is in the first
commit (with no changes -- just a move), while the remainder of the
changes to actual files is in the second commit.
2024-02-10 20:22:13 +00:00

77 lines
2.1 KiB
TypeScript

// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
import { assertEquals } from "./test_util.ts";
import { Buffer } from "@test_util/std/io/buffer.ts";
const DEFAULT_BUF_SIZE = 32 * 1024;
type Spy = { calls: number };
function repeat(c: string, bytes: number): Uint8Array {
assertEquals(c.length, 1);
const ui8 = new Uint8Array(bytes);
ui8.fill(c.charCodeAt(0));
return ui8;
}
function spyRead(obj: Buffer): Spy {
const spy: Spy = {
calls: 0,
};
const orig = obj.read.bind(obj);
obj.read = (p: Uint8Array): Promise<number | null> => {
spy.calls++;
return orig(p);
};
return spy;
}
Deno.test(async function copyWithDefaultBufferSize() {
const xBytes = repeat("b", DEFAULT_BUF_SIZE);
const reader = new Buffer(xBytes.buffer as ArrayBuffer);
const write = new Buffer();
const readSpy = spyRead(reader);
// deno-lint-ignore no-deprecated-deno-api
const n = await Deno.copy(reader, write);
assertEquals(n, xBytes.length);
assertEquals(write.length, xBytes.length);
assertEquals(readSpy.calls, 2); // read with DEFAULT_BUF_SIZE bytes + read with 0 bytes
});
Deno.test(async function copyWithCustomBufferSize() {
const bufSize = 1024;
const xBytes = repeat("b", DEFAULT_BUF_SIZE);
const reader = new Buffer(xBytes.buffer as ArrayBuffer);
const write = new Buffer();
const readSpy = spyRead(reader);
// deno-lint-ignore no-deprecated-deno-api
const n = await Deno.copy(reader, write, { bufSize });
assertEquals(n, xBytes.length);
assertEquals(write.length, xBytes.length);
assertEquals(readSpy.calls, DEFAULT_BUF_SIZE / bufSize + 1);
});
Deno.test({ permissions: { write: true } }, async function copyBufferToFile() {
const filePath = "test-file.txt";
// bigger than max File possible buffer 16kb
const bufSize = 32 * 1024;
const xBytes = repeat("b", bufSize);
const reader = new Buffer(xBytes.buffer as ArrayBuffer);
const write = await Deno.open(filePath, { write: true, create: true });
// deno-lint-ignore no-deprecated-deno-api
const n = await Deno.copy(reader, write, { bufSize });
assertEquals(n, xBytes.length);
write.close();
await Deno.remove(filePath);
});