Version 1

.vscode/settings.json

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+{
+    "deno.enable": true,
+    "deno.import_intellisense_origins": {
+        "https://deno.land": false
+    },
+}

dep.ts

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+export { parse } from "https://deno.land/std/path/mod.ts";

mod/dirname.ts

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+import { parse } from "../dep.ts";
+
+export default (meta: ImportMeta): string => parse(meta.url).dir;

mod/filename.ts

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+import { parse } from "../dep.ts";
+
+export default (meta: ImportMeta): string =>
+  parse(meta.url).name + parse(meta.url).ext;

test.ts

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+import { assert } from "https://deno.land/std/testing/asserts.ts";
+
+import dirname from './mod/dirname.ts';
+import filename from './mod/filename.ts';
+
+Deno.test({
+  name: ".dirname()",
+  fn(): void {
+    assert(dirname(import.meta).startsWith("file://"));
+  },
+});
+
+Deno.test({
+  name: ".filename()",
+  fn(): void {
+    assert(filename(import.meta).endsWith(".ts"))
+  }
+})