1 files changed, 48 insertions, 0 deletions
diff --git a/std/node/_fs/_fs_readFile_test.ts b/std/node/_fs/_fs_readFile_test.ts
new file mode 100644
index 000000000..b03d53563
--- /dev/null
+++ b/std/node/_fs/_fs_readFile_test.ts
@@ -0,0 +1,48 @@
+const { test } = Deno;
+import { readFile, readFileSync } from "./_fs_readFile.ts";
+import * as path from "../../path/mod.ts";
+import { assertEquals, assert } from "../../testing/asserts.ts";
+
+const testData = path.resolve(
+  path.join("node", "_fs", "testdata", "hello.txt")
+);
+
+test(async function readFileSuccess() {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");
+});
+
+test(async function readFileEncodeUtf8Success() {
+  const data = await new Promise((res, rej) => {
+    readFile(testData, { encoding: "utf8" }, (err, data) => {
+      if (err) {
+        rej(err);
+      }
+      res(data);
+    });
+  });
+
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});
+
+test(function readFileSyncSuccess() {
+  const data = readFileSync(testData);
+  assert(data instanceof Uint8Array);
+  assertEquals(new TextDecoder().decode(data as Uint8Array), "hello world");
+});
+
+test(function readFileEncodeUtf8Success() {
+  const data = readFileSync(testData, { encoding: "utf8" });
+  assertEquals(typeof data, "string");
+  assertEquals(data as string, "hello world");
+});