test(std/node): make tests runnable from any directory (#7397)

This makes std/node tests runnable from any directory by resolving the
testdata directory and files relative to the module directory resolved
from import.meta.url.

1 files changed, 11 insertions, 1 deletions

diff --git a/std/node/module_test.ts b/std/node/module_test.ts
index bdc2f39d3..12021782a 100644
--- a/std/node/module_test.ts
+++ b/std/node/module_test.ts
@@ -4,8 +4,13 @@ import {
   assert,
   assertStringContains,
 } from "../testing/asserts.ts";
+
+import * as path from "../path/mod.ts";
 import { createRequire } from "./module.ts";
 
+const moduleDir = path.dirname(path.fromFileUrl(import.meta.url));
+const testdataDir = path.resolve(moduleDir, path.join("_fs", "testdata"));
+
 const require = createRequire(import.meta.url);
 
 Deno.test("requireSuccess", function () {
@@ -32,8 +37,13 @@ Deno.test("requireBuiltin", function () {
   const fs = require("fs");
   assert("readFileSync" in fs);
   const { readFileSync, isNull, extname } = require("./tests/cjs/cjs_builtin");
+
+  const testData = path.relative(
+    Deno.cwd(),
+    path.join(testdataDir, "hello.txt"),
+  );
   assertEquals(
-    readFileSync("./node/_fs/testdata/hello.txt", { encoding: "utf8" }),
+    readFileSync(testData, { encoding: "utf8" }),
     "hello world",
   );
   assert(isNull(null));