run tscCheck on preprocessed templates

test both browser and node platform variants

Author: t089

Plugins/PackageToJS/Tests/TemplatesTests.swift

@@ -9,10 +9,47 @@ import Foundation
         .appendingPathComponent("Templates")
 
     /// `npx tsc -p Templates/tsconfig.json`
-    @Test func tscCheck() throws {
+    /// Test both node and browser platform variants
+    @Test(arguments: ["node", "browser"])
+    func tscCheck(platform: String) throws {
+        // Create a temporary directory for preprocessed files
+        let tempDir = FileManager.default.temporaryDirectory
+            .appendingPathComponent("JavaScriptKit-tsc-\(platform)-\(UUID().uuidString)")
+        defer {
+            try? FileManager.default.removeItem(at: tempDir)
+        }
+
+        // Copy entire templates folder to temp location
+        try FileManager.default.copyItem(at: Self.templatesPath, to: tempDir)
+
+        // Setup preprocessing conditions
+        let conditions: [String: Bool] = [
+            "USE_SHARED_MEMORY": false,
+            "IS_WASI": true,
+            "USE_WASI_CDN": false,
+            "HAS_BRIDGE": false,
+            "HAS_IMPORTS": platform == "browser",
+            "TARGET_PLATFORM_NODE": platform == "node",
+        ]
+        let preprocessOptions = PreprocessOptions(conditions: conditions, substitutions: [:])
+
+        // Preprocess all JS and TS files in-place
+        let enumerator = FileManager.default.enumerator(at: tempDir, includingPropertiesForKeys: nil)
+        while let fileURL = enumerator?.nextObject() as? URL {
+            guard !fileURL.hasDirectoryPath,
+                  fileURL.pathExtension == "js" || fileURL.pathExtension == "ts" else {
+                continue
+            }
+
+            let content = try String(contentsOf: fileURL, encoding: .utf8)
+            let preprocessed = try preprocess(source: content, file: fileURL.path, options: preprocessOptions)
+            try preprocessed.write(to: fileURL, atomically: true, encoding: .utf8)
+        }
+
+        // Run TypeScript on the preprocessed files
         let tsc = Process()
         tsc.executableURL = try which("npx")
-        tsc.arguments = ["tsc", "-p", Self.templatesPath.appending(path: "tsconfig.json").path]
+        tsc.arguments = ["tsc", "-p", tempDir.appending(path: "tsconfig.json").path]
         try tsc.run()
         tsc.waitUntilExit()
         #expect(tsc.terminationStatus == 0)