#3633 - Move linter tests into test/linter

test/linter/test_haskell_hdevtools.vader

@@ -0,0 +1,16 @@
+Before:
+  call ale#assert#SetUpLinterTest('haskell', 'hdevtools')
+
+  let b:command_tail = ' check -g -Wall -p %s %t'
+
+After:
+  unlet! b:command_tail
+
+  call ale#assert#TearDownLinterTest()
+
+Execute(The executable should be configurable):
+  AssertLinter 'hdevtools', ale#Escape('hdevtools') . b:command_tail
+
+  let b:ale_haskell_hdevtools_executable = 'foobar'
+
+  AssertLinter 'foobar', ale#Escape('foobar') . b:command_tail