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denoland-deno/cli/js/copy_file_test.ts

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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { testPerm, assert, assertEquals } from "./test_util.ts";
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function readFileString(filename: string): string {
const dataRead = Deno.readFileSync(filename);
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const dec = new TextDecoder("utf-8");
return dec.decode(dataRead);
}
function writeFileString(filename: string, s: string): void {
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const enc = new TextEncoder();
const data = enc.encode(s);
Deno.writeFileSync(filename, data, { perm: 0o666 });
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}
function assertSameContent(filename1: string, filename2: string): void {
const data1 = Deno.readFileSync(filename1);
const data2 = Deno.readFileSync(filename2);
assertEquals(data1, data2);
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}
testPerm({ read: true, write: true }, function copyFileSyncSuccess(): void {
const tempDir = Deno.makeTempDirSync();
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const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
writeFileString(fromFilename, "Hello world!");
Deno.copyFileSync(fromFilename, toFilename);
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// No change to original file
assertEquals(readFileString(fromFilename), "Hello world!");
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// Original == Dest
assertSameContent(fromFilename, toFilename);
});
testPerm({ write: true, read: true }, function copyFileSyncFailure(): void {
const tempDir = Deno.makeTempDirSync();
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const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
// We skip initial writing here, from.txt does not exist
let err;
try {
Deno.copyFileSync(fromFilename, toFilename);
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} catch (e) {
err = e;
}
assert(!!err);
assert(err instanceof Deno.Err.NotFound);
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});
testPerm({ write: true, read: false }, function copyFileSyncPerm1(): void {
let caughtError = false;
try {
Deno.copyFileSync("/from.txt", "/to.txt");
} catch (e) {
caughtError = true;
assert(e instanceof Deno.Err.PermissionDenied);
}
assert(caughtError);
});
testPerm({ write: false, read: true }, function copyFileSyncPerm2(): void {
let caughtError = false;
try {
Deno.copyFileSync("/from.txt", "/to.txt");
} catch (e) {
caughtError = true;
assert(e instanceof Deno.Err.PermissionDenied);
}
assert(caughtError);
});
testPerm({ read: true, write: true }, function copyFileSyncOverwrite(): void {
const tempDir = Deno.makeTempDirSync();
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const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
writeFileString(fromFilename, "Hello world!");
// Make Dest exist and have different content
writeFileString(toFilename, "Goodbye!");
Deno.copyFileSync(fromFilename, toFilename);
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// No change to original file
assertEquals(readFileString(fromFilename), "Hello world!");
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// Original == Dest
assertSameContent(fromFilename, toFilename);
});
testPerm({ read: true, write: true }, async function copyFileSuccess(): Promise<
void
> {
const tempDir = Deno.makeTempDirSync();
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const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
writeFileString(fromFilename, "Hello world!");
await Deno.copyFile(fromFilename, toFilename);
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// No change to original file
assertEquals(readFileString(fromFilename), "Hello world!");
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// Original == Dest
assertSameContent(fromFilename, toFilename);
});
testPerm({ read: true, write: true }, async function copyFileFailure(): Promise<
void
> {
const tempDir = Deno.makeTempDirSync();
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const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
// We skip initial writing here, from.txt does not exist
let err;
try {
await Deno.copyFile(fromFilename, toFilename);
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} catch (e) {
err = e;
}
assert(!!err);
assert(err instanceof Deno.Err.NotFound);
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});
testPerm(
{ read: true, write: true },
async function copyFileOverwrite(): Promise<void> {
const tempDir = Deno.makeTempDirSync();
const fromFilename = tempDir + "/from.txt";
const toFilename = tempDir + "/to.txt";
writeFileString(fromFilename, "Hello world!");
// Make Dest exist and have different content
writeFileString(toFilename, "Goodbye!");
await Deno.copyFile(fromFilename, toFilename);
// No change to original file
assertEquals(readFileString(fromFilename), "Hello world!");
// Original == Dest
assertSameContent(fromFilename, toFilename);
}
);
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testPerm({ read: false, write: true }, async function copyFilePerm1(): Promise<
void
> {
let caughtError = false;
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try {
await Deno.copyFile("/from.txt", "/to.txt");
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} catch (e) {
caughtError = true;
assert(e instanceof Deno.Err.PermissionDenied);
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}
assert(caughtError);
});
testPerm({ read: true, write: false }, async function copyFilePerm2(): Promise<
void
> {
let caughtError = false;
try {
await Deno.copyFile("/from.txt", "/to.txt");
} catch (e) {
caughtError = true;
assert(e instanceof Deno.Err.PermissionDenied);
}
assert(caughtError);
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});