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denoland-deno/js/read_file_test.ts
Ryan Dahl c42a9d7370
Upgrade deno_std (#1892)
A major API change was that asserts are imported from testing/asserts.ts
now rather than testing/mod.ts and assertEqual as renamed to
assertEquals to conform to what is most common in JavaScript.
2019-03-06 20:48:46 -05:00

57 lines
1.6 KiB
TypeScript

// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import { testPerm, assert, assertEquals } from "./test_util.ts";
testPerm({ read: true }, function readFileSyncSuccess() {
const data = Deno.readFileSync("package.json");
assert(data.byteLength > 0);
const decoder = new TextDecoder("utf-8");
const json = decoder.decode(data);
const pkg = JSON.parse(json);
assertEquals(pkg.name, "deno");
});
testPerm({ read: false }, function readFileSyncPerm() {
let caughtError = false;
try {
const data = Deno.readFileSync("package.json");
} catch (e) {
caughtError = true;
assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
assertEquals(e.name, "PermissionDenied");
}
assert(caughtError);
});
testPerm({ read: true }, function readFileSyncNotFound() {
let caughtError = false;
let data;
try {
data = Deno.readFileSync("bad_filename");
} catch (e) {
caughtError = true;
assertEquals(e.kind, Deno.ErrorKind.NotFound);
}
assert(caughtError);
assert(data === undefined);
});
testPerm({ read: true }, async function readFileSuccess() {
const data = await Deno.readFile("package.json");
assert(data.byteLength > 0);
const decoder = new TextDecoder("utf-8");
const json = decoder.decode(data);
const pkg = JSON.parse(json);
assertEquals(pkg.name, "deno");
});
testPerm({ read: false }, async function readFilePerm() {
let caughtError = false;
try {
await Deno.readFile("package.json");
} catch (e) {
caughtError = true;
assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
assertEquals(e.name, "PermissionDenied");
}
assert(caughtError);
});