Add basic test outline for Sile Writer

test/Tests/Writers/Sile.hs

@@ -0,0 +1,37 @@
+{-# LANGUAGE NoImplicitPrelude #-}
+{-# LANGUAGE OverloadedStrings #-}
+module Tests.Writers.Sile (tests) where
+
+import Prelude
+import Data.Text (unpack)
+import Test.Tasty
+import Tests.Helpers
+import Text.Pandoc
+import Text.Pandoc.Arbitrary ()
+import Text.Pandoc.Builder
+
+sile :: (ToPandoc a) => a -> String
+sile = sileWithOpts def
+
+sileWithOpts :: (ToPandoc a) => WriterOptions -> a -> String
+sileWithOpts opts = unpack . purely (writeSile opts) . toPandoc
+
+{-
+  "my test" =: X =?> Y
+
+is shorthand for
+
+  test sile "my test" $ X =?> Y
+
+which is in turn shorthand for
+
+  test sile "my test" (X,Y)
+-}
+
+infix 4 =:
+(=:) :: (ToString a, ToPandoc a)
+     => String -> (a, String) -> TestTree
+(=:) = test sile
+
+tests :: [TestTree]
+tests = []