1 files changed, 176 insertions, 0 deletions
diff --git a/cli/tests/unit/copy_file_test.ts b/cli/tests/unit/copy_file_test.ts
new file mode 100644
index 000000000..986bab53b
--- /dev/null
+++ b/cli/tests/unit/copy_file_test.ts
@@ -0,0 +1,176 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { unitTest, assert, assertEquals } from "./test_util.ts";
+
+function readFileString(filename: string): string {
+  const dataRead = Deno.readFileSync(filename);
+  const dec = new TextDecoder("utf-8");
+  return dec.decode(dataRead);
+}
+
+function writeFileString(filename: string, s: string): void {
+  const enc = new TextEncoder();
+  const data = enc.encode(s);
+  Deno.writeFileSync(filename, data, { mode: 0o666 });
+}
+
+function assertSameContent(filename1: string, filename2: string): void {
+  const data1 = Deno.readFileSync(filename1);
+  const data2 = Deno.readFileSync(filename2);
+  assertEquals(data1, data2);
+}
+
+unitTest(
+  { perms: { read: true, write: true } },
+  function copyFileSyncSuccess(): void {
+    const tempDir = Deno.makeTempDirSync();
+    const fromFilename = tempDir + "/from.txt";
+    const toFilename = tempDir + "/to.txt";
+    writeFileString(fromFilename, "Hello world!");
+    Deno.copyFileSync(fromFilename, toFilename);
+    // No change to original file
+    assertEquals(readFileString(fromFilename), "Hello world!");
+    // Original == Dest
+    assertSameContent(fromFilename, toFilename);
+  }
+);
+
+unitTest(
+  { perms: { write: true, read: true } },
+  function copyFileSyncFailure(): void {
+    const tempDir = Deno.makeTempDirSync();
+    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);
+    } catch (e) {
+      err = e;
+    }
+    assert(!!err);
+    assert(err instanceof Deno.errors.NotFound);
+  }
+);
+
+unitTest(
+  { perms: { 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.errors.PermissionDenied);
+    }
+    assert(caughtError);
+  }
+);
+
+unitTest(
+  { perms: { 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.errors.PermissionDenied);
+    }
+    assert(caughtError);
+  }
+);
+
+unitTest(
+  { perms: { read: true, write: true } },
+  function copyFileSyncOverwrite(): 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!");
+    Deno.copyFileSync(fromFilename, toFilename);
+    // No change to original file
+    assertEquals(readFileString(fromFilename), "Hello world!");
+    // Original == Dest
+    assertSameContent(fromFilename, toFilename);
+  }
+);
+
+unitTest(
+  { perms: { read: true, write: true } },
+  async function copyFileSuccess(): Promise<void> {
+    const tempDir = Deno.makeTempDirSync();
+    const fromFilename = tempDir + "/from.txt";
+    const toFilename = tempDir + "/to.txt";
+    writeFileString(fromFilename, "Hello world!");
+    await Deno.copyFile(fromFilename, toFilename);
+    // No change to original file
+    assertEquals(readFileString(fromFilename), "Hello world!");
+    // Original == Dest
+    assertSameContent(fromFilename, toFilename);
+  }
+);
+
+unitTest(
+  { perms: { read: true, write: true } },
+  async function copyFileFailure(): Promise<void> {
+    const tempDir = Deno.makeTempDirSync();
+    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);
+    } catch (e) {
+      err = e;
+    }
+    assert(!!err);
+    assert(err instanceof Deno.errors.NotFound);
+  }
+);
+
+unitTest(
+  { perms: { 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);
+  }
+);
+
+unitTest(
+  { perms: { read: false, write: true } },
+  async function copyFilePerm1(): Promise<void> {
+    let caughtError = false;
+    try {
+      await Deno.copyFile("/from.txt", "/to.txt");
+    } catch (e) {
+      caughtError = true;
+      assert(e instanceof Deno.errors.PermissionDenied);
+    }
+    assert(caughtError);
+  }
+);
+
+unitTest(
+  { perms: { 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.errors.PermissionDenied);
+    }
+    assert(caughtError);
+  }
+);