1 files changed, 182 insertions, 0 deletions
diff --git a/tests/unit/read_file_test.ts b/tests/unit/read_file_test.ts
new file mode 100644
index 000000000..bfb3b5085
--- /dev/null
+++ b/tests/unit/read_file_test.ts
@@ -0,0 +1,182 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import {
+  assert,
+  assertEquals,
+  assertRejects,
+  assertThrows,
+  pathToAbsoluteFileUrl,
+  unreachable,
+} from "./test_util.ts";
+
+Deno.test({ permissions: { read: true } }, function readFileSyncSuccess() {
+  const data = Deno.readFileSync("tests/testdata/assets/fixture.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");
+});
+
+Deno.test({ permissions: { read: true } }, function readFileSyncUrl() {
+  const data = Deno.readFileSync(
+    pathToAbsoluteFileUrl("tests/testdata/assets/fixture.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");
+});
+
+Deno.test({ permissions: { read: false } }, function readFileSyncPerm() {
+  assertThrows(() => {
+    Deno.readFileSync("tests/testdata/assets/fixture.json");
+  }, Deno.errors.PermissionDenied);
+});
+
+Deno.test({ permissions: { read: true } }, function readFileSyncNotFound() {
+  assertThrows(() => {
+    Deno.readFileSync("bad_filename");
+  }, Deno.errors.NotFound);
+});
+
+Deno.test({ permissions: { read: true } }, async function readFileUrl() {
+  const data = await Deno.readFile(
+    pathToAbsoluteFileUrl("tests/testdata/assets/fixture.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");
+});
+
+Deno.test({ permissions: { read: true } }, async function readFileSuccess() {
+  const data = await Deno.readFile("tests/testdata/assets/fixture.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");
+});
+
+Deno.test({ permissions: { read: false } }, async function readFilePerm() {
+  await assertRejects(async () => {
+    await Deno.readFile("tests/testdata/assets/fixture.json");
+  }, Deno.errors.PermissionDenied);
+});
+
+Deno.test({ permissions: { read: true } }, function readFileSyncLoop() {
+  for (let i = 0; i < 256; i++) {
+    Deno.readFileSync("tests/testdata/assets/fixture.json");
+  }
+});
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileDoesNotLeakResources() {
+    await assertRejects(async () => await Deno.readFile("cli"));
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  function readFileSyncDoesNotLeakResources() {
+    assertThrows(() => Deno.readFileSync("cli"));
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileWithAbortSignal() {
+    const ac = new AbortController();
+    queueMicrotask(() => ac.abort());
+    const error = await assertRejects(
+      async () => {
+        await Deno.readFile("tests/testdata/assets/fixture.json", {
+          signal: ac.signal,
+        });
+      },
+    );
+    assert(error instanceof DOMException);
+    assertEquals(error.name, "AbortError");
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileWithAbortSignalReason() {
+    const ac = new AbortController();
+    const abortReason = new Error();
+    queueMicrotask(() => ac.abort(abortReason));
+    const error = await assertRejects(
+      async () => {
+        await Deno.readFile("tests/testdata/assets/fixture.json", {
+          signal: ac.signal,
+        });
+      },
+    );
+    assertEquals(error, abortReason);
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileWithAbortSignalPrimitiveReason() {
+    const ac = new AbortController();
+    queueMicrotask(() => ac.abort("Some string"));
+    try {
+      await Deno.readFile("tests/testdata/assets/fixture.json", {
+        signal: ac.signal,
+      });
+      unreachable();
+    } catch (e) {
+      assertEquals(e, "Some string");
+    }
+  },
+);
+
+// Test that AbortController's cancel handle is cleaned-up correctly, and do not leak resources.
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileWithAbortSignalNotCalled() {
+    const ac = new AbortController();
+    await Deno.readFile("tests/testdata/assets/fixture.json", {
+      signal: ac.signal,
+    });
+  },
+);
+
+Deno.test(
+  { permissions: { read: true }, ignore: Deno.build.os !== "linux" },
+  async function readFileProcFs() {
+    const data = await Deno.readFile("/proc/self/stat");
+    assert(data.byteLength > 0);
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileNotFoundErrorCode() {
+    try {
+      await Deno.readFile("definitely-not-found.json");
+    } catch (e) {
+      assertEquals(e.code, "ENOENT");
+    }
+  },
+);
+
+Deno.test(
+  { permissions: { read: true } },
+  async function readFileIsDirectoryErrorCode() {
+    try {
+      await Deno.readFile("tests/testdata/assets/");
+    } catch (e) {
+      if (Deno.build.os === "windows") {
+        assertEquals(e.code, "ENOENT");
+      } else {
+        assertEquals(e.code, "EISDIR");
+      }
+    }
+  },
+);