1 files changed, 112 insertions, 0 deletions
diff --git a/tests/unit/file_test.ts b/tests/unit/file_test.ts
new file mode 100644
index 000000000..1af3a3f84
--- /dev/null
+++ b/tests/unit/file_test.ts
@@ -0,0 +1,112 @@
+// Copyright 2018-2024 the Deno authors. All rights reserved. MIT license.
+import { assert, assertEquals } from "./test_util.ts";
+
+// deno-lint-ignore no-explicit-any
+function testFirstArgument(arg1: any[], expectedSize: number) {
+  const file = new File(arg1, "name");
+  assert(file instanceof File);
+  assertEquals(file.name, "name");
+  assertEquals(file.size, expectedSize);
+  assertEquals(file.type, "");
+}
+
+Deno.test(function fileEmptyFileBits() {
+  testFirstArgument([], 0);
+});
+
+Deno.test(function fileStringFileBits() {
+  testFirstArgument(["bits"], 4);
+});
+
+Deno.test(function fileUnicodeStringFileBits() {
+  testFirstArgument(["𝓽𝓮𝔁𝓽"], 16);
+});
+
+Deno.test(function fileStringObjectFileBits() {
+  testFirstArgument([new String("string object")], 13);
+});
+
+Deno.test(function fileEmptyBlobFileBits() {
+  testFirstArgument([new Blob()], 0);
+});
+
+Deno.test(function fileBlobFileBits() {
+  testFirstArgument([new Blob(["bits"])], 4);
+});
+
+Deno.test(function fileEmptyFileFileBits() {
+  testFirstArgument([new File([], "world.txt")], 0);
+});
+
+Deno.test(function fileFileFileBits() {
+  testFirstArgument([new File(["bits"], "world.txt")], 4);
+});
+
+Deno.test(function fileArrayBufferFileBits() {
+  testFirstArgument([new ArrayBuffer(8)], 8);
+});
+
+Deno.test(function fileTypedArrayFileBits() {
+  testFirstArgument([new Uint8Array([0x50, 0x41, 0x53, 0x53])], 4);
+});
+
+Deno.test(function fileVariousFileBits() {
+  testFirstArgument(
+    [
+      "bits",
+      new Blob(["bits"]),
+      new Blob(),
+      new Uint8Array([0x50, 0x41]),
+      new Uint16Array([0x5353]),
+      new Uint32Array([0x53534150]),
+    ],
+    16,
+  );
+});
+
+Deno.test(function fileNumberInFileBits() {
+  testFirstArgument([12], 2);
+});
+
+Deno.test(function fileArrayInFileBits() {
+  testFirstArgument([[1, 2, 3]], 5);
+});
+
+Deno.test(function fileObjectInFileBits() {
+  // "[object Object]"
+  testFirstArgument([{}], 15);
+});
+
+// deno-lint-ignore no-explicit-any
+function testSecondArgument(arg2: any, expectedFileName: string) {
+  const file = new File(["bits"], arg2);
+  assert(file instanceof File);
+  assertEquals(file.name, expectedFileName);
+}
+
+Deno.test(function fileUsingFileName() {
+  testSecondArgument("dummy", "dummy");
+});
+
+Deno.test(function fileUsingNullFileName() {
+  testSecondArgument(null, "null");
+});
+
+Deno.test(function fileUsingNumberFileName() {
+  testSecondArgument(1, "1");
+});
+
+Deno.test(function fileUsingEmptyStringFileName() {
+  testSecondArgument("", "");
+});
+
+Deno.test(function inspectFile() {
+  assertEquals(
+    Deno.inspect(new File([], "file-name.txt")),
+    `File { name: "file-name.txt", size: 0, type: "" }`,
+  );
+  assertEquals(
+    Deno.inspect(new File([], "file-name.txt", { type: "text/plain" })),
+    `File { name: "file-name.txt", size: 0, type: "text/plain" }`,
+  );
+});