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62 lines
3.0 KiB
Haskell
62 lines
3.0 KiB
Haskell
{-# LANGUAGE CPP #-}
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module Render
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( main
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)
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where
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import Brick
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import Control.Monad (when)
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#if !(MIN_VERSION_base(4,11,0))
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import Data.Monoid
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#endif
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import qualified Graphics.Vty as V
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import Brick.Widgets.Border (hBorder)
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import Control.Exception (SomeException, try)
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region :: V.DisplayRegion
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region = (30, 10)
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renderDisplay :: Ord n => [Widget n] -> IO ()
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renderDisplay ws = do
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outp <- V.outputForConfig V.defaultConfig
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ctx <- V.displayContext outp region
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V.outputPicture ctx (renderWidget Nothing ws region)
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V.releaseDisplay outp
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myWidget :: Widget ()
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myWidget = str "Why" <=> hBorder <=> str "not?"
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-- Since you can't Read a Picture, we have to compare the result with
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-- the Shown one
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expectedResult :: String
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expectedResult = "Picture {picCursor = NoCursor, picLayers = [VertJoin {partTop = VertJoin {partTop = HorizText {attr = Attr {attrStyle = Default, attrForeColor = Default, attrBackColor = Default, attrURL = Default}, displayText = \"Why \", outputWidth = 30, charWidth = 30}, partBottom = VertJoin {partTop = HorizText {attr = Attr {attrStyle = Default, attrForeColor = Default, attrBackColor = Default, attrURL = Default}, displayText = \"\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\\9472\", outputWidth = 30, charWidth = 30}, partBottom = HorizText {attr = Attr {attrStyle = Default, attrForeColor = Default, attrBackColor = Default, attrURL = Default}, displayText = \"not? \", outputWidth = 30, charWidth = 30}, outputWidth = 30, outputHeight = 2}, outputWidth = 30, outputHeight = 3}, partBottom = BGFill {outputWidth = 30, outputHeight = 7}, outputWidth = 30, outputHeight = 10}], picBackground = Background {backgroundChar = ' ', backgroundAttr = Attr {attrStyle = Default, attrForeColor = Default, attrBackColor = Default, attrURL = Default}}}"
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main :: IO Bool
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main = do
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result <- try (renderDisplay [myWidget]) :: IO (Either SomeException ())
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case result of
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Left _ -> do
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putStrLn "Terminal is not available, skipping test"
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-- Even though we could not actually run the test, we return
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-- True here to prevent the absence of a terminal from
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-- causing a test suite failure in an automated context.
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-- This means that this test effectively doesn't get
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-- considered at all in the automated context.
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return True
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Right () -> do
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let matched = actualResult == expectedResult
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actualResult = show (renderWidget Nothing [myWidget] region)
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msg = if matched then "rendering match" else "rendering mismatch"
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putStrLn ""
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putStrLn $ "renderWidget test outcome: " <> msg
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when (not matched) $ do
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putStrLn "Expected result:"
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putStrLn expectedResult
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putStrLn "Actual result:"
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putStrLn actualResult
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return matched
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