refactor(users/glittershark): Rename to grfn

Rename my //users directory and all places that refer to glittershark to
grfn, including nix references and documentation.

This may require some extra attention inside of gerrit's database after
it lands to allow me to actually push things.

Change-Id: I4728b7ec2c60024392c1c1fa6e0d4a59b3e266fa
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2933
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Reviewed-by: glittershark <grfn@gws.fyi>

users/grfn/xanthous/test/Xanthous/Util/GraphSpec.hs

@@ -0,0 +1,39 @@
+module Xanthous.Util.GraphSpec (main, test) where
+--------------------------------------------------------------------------------
+import Test.Prelude
+--------------------------------------------------------------------------------
+import Xanthous.Util.Graph
+import Data.Graph.Inductive.Basic
+import Data.Graph.Inductive.Graph (labNodes, size, order)
+import Data.Graph.Inductive.PatriciaTree
+import Data.Graph.Inductive.Arbitrary
+--------------------------------------------------------------------------------
+
+main :: IO ()
+main = defaultMain test
+
+test :: TestTree
+test = testGroup "Xanthous.Util.Graph"
+  [ testGroup "mstSubGraph"
+    [ testProperty "always produces a subgraph"
+        $ \(CG _ (graph :: Gr Int Int)) ->
+          let msg = mstSubGraph $ undir graph
+          in counterexample (show msg)
+            $ msg `isSubGraphOf` undir graph
+    , testProperty "returns a graph with the same nodes"
+        $ \(CG _ (graph :: Gr Int Int)) ->
+          let msg = mstSubGraph graph
+          in counterexample (show msg)
+            $ labNodes msg === labNodes graph
+    , testProperty "has nodes - 1 edges"
+        $ \(CG _ (graph :: Gr Int Int)) ->
+          order graph > 1 ==>
+          let msg = mstSubGraph graph
+          in counterexample (show msg)
+            $ size msg === order graph - 1
+    , testProperty "always produces a simple graph"
+        $ \(CG _ (graph :: Gr Int Int)) ->
+          let msg = mstSubGraph graph
+          in counterexample (show msg) $ isSimple msg
+    ]
+  ]

users/grfn/xanthous/test/Xanthous/Util/GraphicsSpec.hs

@@ -0,0 +1,72 @@
+module Xanthous.Util.GraphicsSpec (main, test) where
+--------------------------------------------------------------------------------
+import Test.Prelude hiding (head)
+--------------------------------------------------------------------------------
+import Data.List (nub, head)
+import Data.Set (isSubsetOf)
+import Linear.V2
+--------------------------------------------------------------------------------
+import Xanthous.Util.Graphics
+import Xanthous.Util
+import Xanthous.Orphans ()
+--------------------------------------------------------------------------------
+
+main :: IO ()
+main = defaultMain test
+
+test :: TestTree
+test = testGroup "Xanthous.Util.Graphics"
+  [ testGroup "circle"
+    [ testCase "radius 1, origin 2,2"
+      {-
+        |   | 0 | 1 | 2 | 3 |
+        |---+---+---+---+---|
+        | 0 |   |   |   |   |
+        | 1 |   |   | x |   |
+        | 2 |   | x |   | x |
+        | 3 |   |   | x |   |
+      -}
+      $ (sort . unique @[] @[_]) (circle @Int (V2 2 2) 1)
+      @?= [ V2 1 2
+          , V2 2 1, V2 2 3
+          , V2 3 2
+          ]
+    , testCase "radius 12, origin 0"
+      $   (sort . nub) (circle @Int 0 12)
+      @?= (sort . nub)
+          [ V2 (-12) (-4), V2 (-12) (-3), V2 (-12) (-2), V2 (-12) (-1)
+          , V2 (-12) 0, V2 (-12) 1, V2 (-12) 2, V2 (-12) 3, V2 (-12) 4
+          , V2 (-11) (-6), V2 (-11) (-5), V2 (-11) 5, V2 (-11) 6, V2 (-10) (-7)
+          , V2 (-10) 7, V2 (-9) (-9), V2 (-9) (-8), V2 (-9) 8, V2 (-9) 9
+          , V2 (-8) (-9), V2 (-8) 9, V2 (-7) (-10), V2 (-7) 10, V2 (-6) (-11)
+          , V2 (-6) 11, V2 (-5) (-11), V2 (-5) 11, V2 (-4) (-12), V2 (-4) 12
+          , V2 (-3) (-12), V2 (-3) 12, V2 (-2) (-12), V2 (-2) 12, V2 (-1) (-12)
+          , V2 (-1) 12, V2 0 (-12), V2 0 12, V2 1 (-12), V2 1 12, V2 2 (-12)
+          , V2 2 12, V2 3 (-12), V2 3 12, V2 4 (-12), V2 4 12, V2 5 (-11)
+          , V2 5 11, V2 6 (-11), V2 6 11, V2 7 (-10), V2 7 10, V2 8 (-9), V2 8 9
+          , V2 9 (-9), V2 9 (-8), V2 9 8, V2 9 9, V2 10 (-7), V2 10 7
+          , V2 11 (-6), V2 11 (-5), V2 11 5, V2 11 6, V2 12 (-4), V2 12 (-3)
+          , V2 12 (-2), V2 12 (-1), V2 12 0, V2 12 1, V2 12 2, V2 12 3, V2 12 4
+          ]
+    ]
+  , testGroup "filledCircle"
+    [ testProperty "is a superset of circle" $ \center radius ->
+        let circ = circle @Int center radius
+            filledCirc = filledCircle center radius
+        in counterexample ( "circle: " <> show circ
+                           <> "\nfilledCircle: " <> show filledCirc)
+          $ setFromList circ `isSubsetOf` setFromList filledCirc
+    -- TODO later
+    -- , testProperty "is always contiguous" $ \center radius ->
+    --     let filledCirc = filledCircle center radius
+    --     in counterexample (renderBooleanGraphics filledCirc) $
+    ]
+  , testGroup "line"
+    [ testProperty "starts and ends at the start and end points" $ \start end ->
+        let ℓ = line @Int start end
+        in counterexample ("line: " <> show ℓ)
+        $ length ℓ > 2 ==> (head ℓ === start) .&&. (head (reverse ℓ) === end)
+    ]
+  ]
+
+--------------------------------------------------------------------------------

users/grfn/xanthous/test/Xanthous/Util/InflectionSpec.hs

@@ -0,0 +1,18 @@
+module Xanthous.Util.InflectionSpec (main, test) where
+
+import Test.Prelude
+import Xanthous.Util.Inflection
+
+main :: IO ()
+main = defaultMain test
+
+test :: TestTree
+test = testGroup "Xanthous.Util.Inflection"
+  [ testGroup "toSentence"
+    [ testCase "empty"  $ toSentence [] @?= ""
+    , testCase "single" $ toSentence ["x"] @?= "x"
+    , testCase "two"    $ toSentence ["x", "y"] @?= "x and y"
+    , testCase "three"  $ toSentence ["x", "y", "z"] @?= "x, y, and z"
+    , testCase "four"   $ toSentence ["x", "y", "z", "w"] @?= "x, y, z, and w"
+    ]
+  ]