Implement proper node project test

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/esbuild/package.json

@@ -2,10 +2,8 @@
   "name": "basic-project",
   "private": true,
   "version": "0.0.0",
-  "dependencies": {
-    "lodash": "4.17.21"
-  },
   "devDependencies": {
-    "esbuild": "0.19.5"
+    "esbuild": "0.19.5",
+    "lodash": "4.17.21"
   }
 }

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/src/main/scala/example/Main.scala

@@ -1,13 +1,18 @@
 package example
 
+import example.facade.Fs
 import example.facade.Lodash
+import example.facade.Os
+import example.facade.Path
 
 object Main {
   def main(args: Array[String]): Unit = {
-    println(testString())
+    println(test())
   }
 
-  def testString(): String = {
-    Lodash.toUpper("basic-node-project works!")
+  def test(): String = {
+    val file = Path.join(Fs.mkdtempSync(s"${Os.tmpdir()}${Path.sep}"), "test")
+    Fs.writeFileSync(file, Lodash.toUpper("basic-node-project works!"), "utf8")
+    Fs.readFileSync(file, "utf8")
   }
 }

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/src/main/scala/example/facade/Fs.scala

@@ -0,0 +1,18 @@
+package example.facade
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+object Fs {
+  @js.native
+  @JSImport("node:fs", "mkdtempSync")
+  def mkdtempSync(paths: String): String = js.native
+
+  @js.native
+  @JSImport("node:fs", "writeFileSync")
+  def writeFileSync(file: String, data: String, encoding: String): Unit = js.native
+
+  @js.native
+  @JSImport("node:fs", "readFileSync")
+  def readFileSync(path: String, encoding: String): String = js.native
+}

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/src/main/scala/example/facade/Os.scala

@@ -0,0 +1,10 @@
+package example.facade
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+object Os {
+  @js.native
+  @JSImport("node:os", "tmpdir")
+  def tmpdir(): String = js.native
+}

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/src/main/scala/example/facade/Path.scala

@@ -0,0 +1,14 @@
+package example.facade
+
+import scala.scalajs.js
+import scala.scalajs.js.annotation.JSImport
+
+object Path {
+  @js.native
+  @JSImport("node:path", "join")
+  def join(paths: String*): String = js.native
+
+  @js.native
+  @JSImport("node:path", "sep")
+  val sep: String = js.native
+}

sbt-scalajs-esbuild/src/sbt-test/sbt-scalajs-esbuild/basic-node-project/src/test/scala/example/MainSpec.scala

@@ -7,7 +7,7 @@ class MainSpec extends AnyWordSpec with Matchers {
 
   "Main" should {
     "work" in {
-      Main.testString() shouldEqual "BASIC-NODE-PROJECT WORKS!"
+      Main.test() shouldEqual "BASIC-NODE-PROJECT WORKS!"
     }
   }
 }