add indentation tests for constructor and deriving

Author: Karl Smeltzer

tests/haskell-indentation-tests.el

@@ -896,6 +896,19 @@ foo x
               (2 2)
               (3 2))
 
+(hindent-test "55 data constructor on separate line" "
+data Foo = Bar
+         | Baz"
+              (1 0)
+              (2 9))
+
+(hindent-test "55a deriving below aligned data constructors" "
+data Foo = Bar
+         | Baz
+         deriving (Show)"
+              (1 0)
+              (2 9)
+              (3 9))
 
 (ert-deftest haskell-indentation-ret-indents ()
   (with-temp-switch-to-buffer