Move shift-time into top-level //zoo

I'm still unsure whether or not this is a good idea, but experimenting is a good
way to find out!

zoo/Spec.hs

@@ -0,0 +1,54 @@
+--------------------------------------------------------------------------------
+module Spec where
+--------------------------------------------------------------------------------
+import RIO
+import Test.Hspec
+import Test.QuickCheck
+import Main hiding (main)
+
+import qualified RIO.Text as Text
+--------------------------------------------------------------------------------
+
+main :: IO ()
+main = hspec $ do
+  describe "Main" $ do
+    it "handles seconds" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "s"]) ==
+        (Just defaultShiftTimeRequest { shiftSeconds = x })
+
+    it "handles minutes" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "m"]) ==
+        (Just defaultShiftTimeRequest { shiftMinutes = x })
+
+    it "handles hours" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "h"]) ==
+        (Just defaultShiftTimeRequest { shiftHours = x })
+
+    it "handles days" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "d"]) ==
+        (Just defaultShiftTimeRequest { shiftDays = x })
+
+    it "handles weeks" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "w"]) ==
+        (Just defaultShiftTimeRequest { shiftWeeks = x })
+
+    it "handles months" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "M"]) ==
+        (Just defaultShiftTimeRequest { shiftMonths = x })
+
+    it "handles quarters" $ do
+      property $ \x -> parseTime (Text.concat [x & show & Text.pack, "q"]) ==
+        (Just defaultShiftTimeRequest { shiftQuarters = x })
+
+    it "handles multiple shifts" $ do
+      parseTime "1s-20m5h0d-4w100M-3y2q" ==
+        (Just $ ShiftTimeRequest
+          { shiftSeconds = 1
+          , shiftMinutes = -20
+          , shiftHours = 5
+          , shiftDays = 0
+          , shiftWeeks = -4
+          , shiftMonths = 100
+          , shiftQuarters = 2
+          , shiftYears = -3
+          })