JS IR: normalize the generate file path in the box tests

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicIrBoxTest.kt

@@ -227,7 +227,7 @@ abstract class BasicIrBoxTest(
         // TODO: should we do anything special for module systems?
         // TODO: return list of js from translateFiles and provide then to this function with other js files
 
-        val allFiles = jsFiles.flatMap { file -> cachedDependencies[file]?.let { deps -> deps + file } ?: listOf(file) }
+        val allFiles = jsFiles.flatMap { file -> cachedDependencies[File(file).absolutePath]?.let { deps -> deps + file } ?: listOf(file) }
         testChecker.check(allFiles, testModuleName, testPackage, testFunction, expectedResult, withModuleSystem)
     }
 }