Get more of the tests to pass on Windows

test/test_gradle_find_executable.vader

@@ -1,31 +1,37 @@
 Before:
+  Save $PATH
+  Save $PATHEXT
+
+  " Count the gradle executable without .exe as executable on Windows
+  let $PATHEXT = '.'
+
   call ale#test#SetDirectory('/testplugin/test')
   runtime ale_linters/kotlin/kotlinc.vim
-  let g:ale_gradle_path = $PATH
 
 After:
+  Restore
+
   call ale#test#RestoreDirectory()
   call ale#linter#Reset()
-  let $PATH = g:ale_gradle_path
-  
+
 Execute(Should return 'gradlew' if found in parent directory):
   call ale#test#SetFilename('gradle-test-files/wrapped-project/src/main/kotlin/dummy.kt')
 
   AssertEqual
-  \ g:dir . '/gradle-test-files/wrapped-project/gradlew',
+  \ ale#path#Winify(g:dir . '/gradle-test-files/wrapped-project/gradlew'),
   \ ale#gradle#FindExecutable(bufnr(''))
 
 Execute(Should return 'gradle' if 'gradlew' not found in parent directory):
   call ale#test#SetFilename('gradle-test-files/unwrapped-project/src/main/kotlin/dummy.kt')
-  let $PATH .= ':' . g:dir . '/gradle-test-files'
-  
+  let $PATH .= (has('win32') ? ';': ':') . ale#path#Winify(g:dir . '/gradle-test-files')
+
   AssertEqual
-  \ 'gradle', 
+  \ 'gradle',
   \ ale#gradle#FindExecutable(bufnr(''))
 
 Execute(Should return empty string if 'gradlew' not in parent directory and gradle not in path):
   call ale#test#SetFilename('gradle-test-files/unwrapped-project/src/main/kotlin/dummy.kt')
-  
+
   AssertEqual
-  \ '', 
+  \ '',
   \ ale#gradle#FindExecutable(bufnr(''))