review fix

Author: Frotty

src/main/kotlin/file/Wc3ClientDetector.kt

@@ -78,7 +78,7 @@ object Wc3ClientDetector {
 
     private fun findExecutable(root: Path): Path? {
         if (Files.isRegularFile(root)) {
-            return root
+            return root.takeIf { classifyExecutable(it) != null }
         }
         return exeCandidates
             .map { root.resolve(it) }

src/test/kotlin/Wc3ClientDetectorTests.kt

@@ -37,6 +37,29 @@ class Wc3ClientDetectorTests {
         Assert.assertEquals(info.kind, Wc3ClientDetector.ClientKind.CLASSIC)
     }
 
+    @Test
+    fun testRejectsUnsupportedExplicitFilePath() {
+        val root = Files.createTempDirectory("wc3-explicit-file")
+        val textFile = root.resolve("notes.txt")
+        Files.writeString(textFile, "not a wc3 executable")
+
+        val info = Wc3ClientDetector.inspectGameRoot(textFile)
+
+        Assert.assertNull(info)
+    }
+
+    @Test
+    fun testAcceptsSupportedExplicitFilePath() {
+        val root = Files.createTempDirectory("wc3-explicit-exe")
+        val exe = root.resolve("war3.exe")
+        Files.writeString(exe, "")
+
+        val info = Wc3ClientDetector.inspectGameRoot(exe)!!
+
+        Assert.assertEquals(info.kind, Wc3ClientDetector.ClientKind.PRE_129)
+        Assert.assertEquals(info.root, root.toAbsolutePath().normalize())
+    }
+
     @Test
     fun testWarnsWhenProjectPatchAndClientKindDiffer() {
         val root = Files.createTempDirectory("wc3-mismatch")