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_fs_appendFile_test.ts
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_fs_appendFile_test.ts
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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { assertEquals, assertThrows, fail } from "../../testing/asserts.ts";
import { appendFile, appendFileSync } from "./_fs_appendFile.ts";
import { fromFileUrl } from "../path.ts";
const decoder = new TextDecoder("utf-8");
Deno.test({
name: "No callback Fn results in Error",
fn() {
assertThrows(
() => {
appendFile("some/path", "some data", "utf8");
},
Error,
"No callback function supplied",
);
},
});
Deno.test({
name: "Unsupported encoding results in error()",
fn() {
assertThrows(
() => {
// @ts-expect-error Type '"made-up-encoding"' is not assignable to type
appendFile("some/path", "some data", "made-up-encoding", () => {});
},
Error,
"Only 'utf8' encoding is currently supported",
);
assertThrows(
() => {
appendFile(
"some/path",
"some data",
// @ts-expect-error Type '"made-up-encoding"' is not assignable to type
{ encoding: "made-up-encoding" },
() => {},
);
},
Error,
"Only 'utf8' encoding is currently supported",
);
assertThrows(
// @ts-expect-error Type '"made-up-encoding"' is not assignable to type
() => appendFileSync("some/path", "some data", "made-up-encoding"),
Error,
"Only 'utf8' encoding is currently supported",
);
assertThrows(
() =>
appendFileSync("some/path", "some data", {
// @ts-expect-error Type '"made-up-encoding"' is not assignable to type
encoding: "made-up-encoding",
}),
Error,
"Only 'utf8' encoding is currently supported",
);
},
});
Deno.test({
name: "Async: Data is written to passed in rid",
async fn() {
const tempFile: string = await Deno.makeTempFile();
const file: Deno.File = await Deno.open(tempFile, {
create: true,
write: true,
read: true,
});
await new Promise((resolve, reject) => {
appendFile(file.rid, "hello world", (err) => {
if (err) reject();
else resolve();
});
})
.then(async () => {
const data = await Deno.readFile(tempFile);
assertEquals(decoder.decode(data), "hello world");
})
.catch(() => {
fail("No error expected");
})
.finally(async () => {
Deno.close(file.rid);
await Deno.remove(tempFile);
});
},
});
Deno.test({
name: "Async: Data is written to passed in file path",
async fn() {
const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
await new Promise((resolve, reject) => {
appendFile("_fs_appendFile_test_file.txt", "hello world", (err) => {
if (err) reject(err);
else resolve();
});
})
.then(async () => {
assertEquals(Deno.resources(), openResourcesBeforeAppend);
const data = await Deno.readFile("_fs_appendFile_test_file.txt");
assertEquals(decoder.decode(data), "hello world");
})
.catch((err) => {
fail("No error was expected: " + err);
})
.finally(async () => {
await Deno.remove("_fs_appendFile_test_file.txt");
});
},
});
Deno.test({
name: "Async: Data is written to passed in URL",
async fn() {
const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
const fileURL = new URL("_fs_appendFile_test_file.txt", import.meta.url);
await new Promise((resolve, reject) => {
appendFile(fileURL, "hello world", (err) => {
if (err) reject(err);
else resolve();
});
})
.then(async () => {
assertEquals(Deno.resources(), openResourcesBeforeAppend);
const data = await Deno.readFile(fromFileUrl(fileURL));
assertEquals(decoder.decode(data), "hello world");
})
.catch((err) => {
fail("No error was expected: " + err);
})
.finally(async () => {
await Deno.remove(fromFileUrl(fileURL));
});
},
});
Deno.test({
name:
"Async: Callback is made with error if attempting to append data to an existing file with 'ax' flag",
async fn() {
const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
const tempFile: string = await Deno.makeTempFile();
await new Promise((resolve, reject) => {
appendFile(tempFile, "hello world", { flag: "ax" }, (err) => {
if (err) reject(err);
else resolve();
});
})
.then(() => {
fail("Expected error to be thrown");
})
.catch(() => {
assertEquals(Deno.resources(), openResourcesBeforeAppend);
})
.finally(async () => {
await Deno.remove(tempFile);
});
},
});
Deno.test({
name: "Sync: Data is written to passed in rid",
fn() {
const tempFile: string = Deno.makeTempFileSync();
const file: Deno.File = Deno.openSync(tempFile, {
create: true,
write: true,
read: true,
});
appendFileSync(file.rid, "hello world");
Deno.close(file.rid);
const data = Deno.readFileSync(tempFile);
assertEquals(decoder.decode(data), "hello world");
Deno.removeSync(tempFile);
},
});
Deno.test({
name: "Sync: Data is written to passed in file path",
fn() {
const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
appendFileSync("_fs_appendFile_test_file_sync.txt", "hello world");
assertEquals(Deno.resources(), openResourcesBeforeAppend);
const data = Deno.readFileSync("_fs_appendFile_test_file_sync.txt");
assertEquals(decoder.decode(data), "hello world");
Deno.removeSync("_fs_appendFile_test_file_sync.txt");
},
});
Deno.test({
name:
"Sync: error thrown if attempting to append data to an existing file with 'ax' flag",
fn() {
const openResourcesBeforeAppend: Deno.ResourceMap = Deno.resources();
const tempFile: string = Deno.makeTempFileSync();
assertThrows(
() => appendFileSync(tempFile, "hello world", { flag: "ax" }),
Deno.errors.AlreadyExists,
"",
);
assertEquals(Deno.resources(), openResourcesBeforeAppend);
Deno.removeSync(tempFile);
},
});