1 files changed, 219 insertions, 0 deletions
diff --git a/cli/js/write_file_test.ts b/cli/js/write_file_test.ts
new file mode 100644
index 000000000..e1bbb67b3
--- /dev/null
+++ b/cli/js/write_file_test.ts
@@ -0,0 +1,219 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { testPerm, assert, assertEquals } from "./test_util.ts";
+
+testPerm({ read: true, write: true }, function writeFileSyncSuccess(): void {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  Deno.writeFileSync(filename, data);
+  const dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  const actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+});
+
+testPerm({ write: true }, function writeFileSyncFail(): void {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = "/baddir/test.txt";
+  // The following should fail because /baddir doesn't exist (hopefully).
+  let caughtError = false;
+  try {
+    Deno.writeFileSync(filename, data);
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.NotFound);
+    assertEquals(e.name, "NotFound");
+  }
+  assert(caughtError);
+});
+
+testPerm({ write: false }, function writeFileSyncPerm(): void {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = "/baddir/test.txt";
+  // The following should fail due to no write permission
+  let caughtError = false;
+  try {
+    Deno.writeFileSync(filename, data);
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
+    assertEquals(e.name, "PermissionDenied");
+  }
+  assert(caughtError);
+});
+
+testPerm({ read: true, write: true }, function writeFileSyncUpdatePerm(): void {
+  if (Deno.build.os !== "win") {
+    const enc = new TextEncoder();
+    const data = enc.encode("Hello");
+    const filename = Deno.makeTempDirSync() + "/test.txt";
+    Deno.writeFileSync(filename, data, { perm: 0o755 });
+    assertEquals(Deno.statSync(filename).mode & 0o777, 0o755);
+    Deno.writeFileSync(filename, data, { perm: 0o666 });
+    assertEquals(Deno.statSync(filename).mode & 0o777, 0o666);
+  }
+});
+
+testPerm({ read: true, write: true }, function writeFileSyncCreate(): void {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  let caughtError = false;
+  // if create turned off, the file won't be created
+  try {
+    Deno.writeFileSync(filename, data, { create: false });
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.NotFound);
+    assertEquals(e.name, "NotFound");
+  }
+  assert(caughtError);
+
+  // Turn on create, should have no error
+  Deno.writeFileSync(filename, data, { create: true });
+  Deno.writeFileSync(filename, data, { create: false });
+  const dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  const actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+});
+
+testPerm({ read: true, write: true }, function writeFileSyncAppend(): void {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  Deno.writeFileSync(filename, data);
+  Deno.writeFileSync(filename, data, { append: true });
+  let dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  let actual = dec.decode(dataRead);
+  assertEquals("HelloHello", actual);
+  // Now attempt overwrite
+  Deno.writeFileSync(filename, data, { append: false });
+  dataRead = Deno.readFileSync(filename);
+  actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+  // append not set should also overwrite
+  Deno.writeFileSync(filename, data);
+  dataRead = Deno.readFileSync(filename);
+  actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+});
+
+testPerm(
+  { read: true, write: true },
+  async function writeFileSuccess(): Promise<void> {
+    const enc = new TextEncoder();
+    const data = enc.encode("Hello");
+    const filename = Deno.makeTempDirSync() + "/test.txt";
+    await Deno.writeFile(filename, data);
+    const dataRead = Deno.readFileSync(filename);
+    const dec = new TextDecoder("utf-8");
+    const actual = dec.decode(dataRead);
+    assertEquals("Hello", actual);
+  }
+);
+
+testPerm(
+  { read: true, write: true },
+  async function writeFileNotFound(): Promise<void> {
+    const enc = new TextEncoder();
+    const data = enc.encode("Hello");
+    const filename = "/baddir/test.txt";
+    // The following should fail because /baddir doesn't exist (hopefully).
+    let caughtError = false;
+    try {
+      await Deno.writeFile(filename, data);
+    } catch (e) {
+      caughtError = true;
+      assertEquals(e.kind, Deno.ErrorKind.NotFound);
+      assertEquals(e.name, "NotFound");
+    }
+    assert(caughtError);
+  }
+);
+
+testPerm({ read: true, write: false }, async function writeFilePerm(): Promise<
+  void
+> {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = "/baddir/test.txt";
+  // The following should fail due to no write permission
+  let caughtError = false;
+  try {
+    await Deno.writeFile(filename, data);
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.PermissionDenied);
+    assertEquals(e.name, "PermissionDenied");
+  }
+  assert(caughtError);
+});
+
+testPerm(
+  { read: true, write: true },
+  async function writeFileUpdatePerm(): Promise<void> {
+    if (Deno.build.os !== "win") {
+      const enc = new TextEncoder();
+      const data = enc.encode("Hello");
+      const filename = Deno.makeTempDirSync() + "/test.txt";
+      await Deno.writeFile(filename, data, { perm: 0o755 });
+      assertEquals(Deno.statSync(filename).mode & 0o777, 0o755);
+      await Deno.writeFile(filename, data, { perm: 0o666 });
+      assertEquals(Deno.statSync(filename).mode & 0o777, 0o666);
+    }
+  }
+);
+
+testPerm({ read: true, write: true }, async function writeFileCreate(): Promise<
+  void
+> {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  let caughtError = false;
+  // if create turned off, the file won't be created
+  try {
+    await Deno.writeFile(filename, data, { create: false });
+  } catch (e) {
+    caughtError = true;
+    assertEquals(e.kind, Deno.ErrorKind.NotFound);
+    assertEquals(e.name, "NotFound");
+  }
+  assert(caughtError);
+
+  // Turn on create, should have no error
+  await Deno.writeFile(filename, data, { create: true });
+  await Deno.writeFile(filename, data, { create: false });
+  const dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  const actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+});
+
+testPerm({ read: true, write: true }, async function writeFileAppend(): Promise<
+  void
+> {
+  const enc = new TextEncoder();
+  const data = enc.encode("Hello");
+  const filename = Deno.makeTempDirSync() + "/test.txt";
+  await Deno.writeFile(filename, data);
+  await Deno.writeFile(filename, data, { append: true });
+  let dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  let actual = dec.decode(dataRead);
+  assertEquals("HelloHello", actual);
+  // Now attempt overwrite
+  await Deno.writeFile(filename, data, { append: false });
+  dataRead = Deno.readFileSync(filename);
+  actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+  // append not set should also overwrite
+  await Deno.writeFile(filename, data);
+  dataRead = Deno.readFileSync(filename);
+  actual = dec.decode(dataRead);
+  assertEquals("Hello", actual);
+});