stylist-2.0.0.0: test/Test.hs
{-# LANGUAGE OverloadedStrings #-}
module Main where
import Test.Hspec
import Data.HashMap.Strict
import Data.Maybe (fromJust)
import Network.URI
import Data.Scientific (toRealFloat)
import Data.CSS.Syntax.Tokens
import Data.CSS.Syntax.StyleSheet (parse, StyleSheet(..), TrivialStyleSheet(..), scanAtRule, scanValue)
import Data.CSS.Syntax.Selector
import Data.CSS.Style.Common
import Data.CSS.Style.Selector.Index
import Data.CSS.Style.Selector.Interpret
import Data.CSS.Style
import Data.CSS.Preprocessor.Conditions
import Data.CSS.Preprocessor.Conditions.Expr (Datum(..), Op(..), parse', eval)
main :: IO ()
main = hspec spec
spec :: Spec
spec = do
describe "Canary" $ do
it "Test framework works" $ do
True `shouldBe` True
describe "Parsing" $ do
it "Can scan @rules" $ do
scanAtRule [Ident "utf-8", Semicolon, Ident "a"] `shouldBe` ([Ident "utf-8", Semicolon], [Ident "a"])
scanAtRule [Ident "before", LeftCurlyBracket, Ident "inside", RightCurlyBracket, Ident "after"] `shouldBe` (
[Ident "before", LeftCurlyBracket, Ident "inside", RightCurlyBracket],
[Ident "after"])
it "Ignores @rules" $ do
parse emptyStyle "@encoding 'utf-8';" `shouldBe` emptyStyle
parse emptyStyle " @encoding 'utf-8';" `shouldBe` emptyStyle
parse emptyStyle "@encoding 'utf-8'; " `shouldBe` emptyStyle
parse emptyStyle "@media print { a:link {color: green;} }" `shouldBe` emptyStyle
parse emptyStyle " @media print { a:link {color: green;} }" `shouldBe` emptyStyle
parse emptyStyle "@media print { a:link {color: green;} } " `shouldBe` emptyStyle
parse emptyStyle "@encoding 'utf-8'; a {color:green}" `shouldBe` linkStyle
parse emptyStyle "a {color:green}@encoding 'utf-8';" `shouldBe` linkStyle
parse emptyStyle "@media print{a{color:black;}}a {color:green}" `shouldBe` linkStyle
parse emptyStyle "a {color:green} @media print {a{color:black;}}" `shouldBe` linkStyle
it "Parses style rules" $ do
-- Syntax examples from "Head First HTML & CSS with XHTML"
parse emptyStyle "bedroom { drapes: blue; carpet: wool shag; }" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "bedroom"]) [
("drapes", [Ident "blue"]),
("carpet", [Ident "wool", Ident "shag"])
] ""]
parse emptyStyle " bathroom{tile :1in white;drapes :pink}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "bathroom"]) [
("tile", [Dimension "1" (NVInteger 1) "in", Ident "white"]),
("drapes", [Ident "pink"])
] ""]
it "Parses selectors" $ do
parse emptyStyle ".class {}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Class "class"]) [] ""
]
parse emptyStyle "*.class {}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Class "class"]) [] ""
]
parse emptyStyle "#id {}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Id "id"]) [] ""
]
parse emptyStyle "[attr] {}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Property Nothing "attr" Exists]) [] ""
]
parse emptyStyle "a , b {}" `shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "b"]) [] "",
StyleRule (Element [Tag "a"]) [] ""
]
parse emptyStyle "a b {}" `shouldBe` TrivialStyleSheet [
StyleRule (Descendant (Element [Tag "a"]) [Tag "b"]) [] ""
]
parse emptyStyle "a > b {}" `shouldBe` TrivialStyleSheet [
StyleRule (Child (Element [Tag "a"]) [Tag "b"]) [] ""
]
parse emptyStyle "a ~ b {}" `shouldBe` TrivialStyleSheet [
StyleRule (Sibling (Element [Tag "a"]) [Tag "b"]) [] ""
]
parse emptyStyle "a + b {}" `shouldBe` TrivialStyleSheet [
StyleRule (Adjacent (Element [Tag "a"]) [Tag "b"]) [] ""
]
parse emptyStyle "a::before {}"
`shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "a"]) [] "before"
]
parse emptyStyle "a:before {}"
`shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "a", Psuedoclass "before" []]) [] ""
]
describe "Style Index" $ do
it "Retrieves appropriate styles" $ do
let index = addStyleRule styleIndex 0 $ styleRule' sampleRule
let element = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [
Attribute "class" "" "external",
Attribute "href" "" "https://adrian.geek.nz/",
Attribute "id" "" "mysite"
]
}
let element2 = ElementNode {
name = "b",
namespace = "",
parent = Just element,
previous = Just element, -- Invalid tree, oh well.
attributes = []
}
rulesForElement index element `shouldBe` [sampleRule]
rulesForElement index element2 `shouldBe` []
let rule1 = StyleRule (Element [Class "external"]) [("color", [Ident "green"])] ""
let index1 = addStyleRule styleIndex 0 $ styleRule' rule1
rulesForElement index1 element `shouldBe` [rule1]
rulesForElement index1 element2 `shouldBe` []
let rule2 = StyleRule (Element [Id "mysite"]) [("color", [Ident "green"])] ""
let index2 = addStyleRule styleIndex 0 $ styleRule' rule2
rulesForElement index2 element `shouldBe` [rule2]
rulesForElement index2 element2 `shouldBe` []
let rule3 = StyleRule (Element [Property Nothing "href" $ Prefix "https://"]) [("color", [Ident "green"])] ""
let index3 = addStyleRule styleIndex 0 $ styleRule' rule3
rulesForElement index3 element `shouldBe` [rule3]
rulesForElement index3 element2 `shouldBe` []
describe "Selector Compiler" $ do
it "Correctly evaluates selectors" $ do
let parentEl = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [
Attribute "class" "" "external secure link",
Attribute "href" "" "https://adrian.geek.nz/index.html",
Attribute "id" "" "mysite",
Attribute "lang" "" "en-US"
]
}
let sibling = ElementNode {
name = "img",
namespace = "",
parent = Just parentEl,
previous = Nothing,
attributes = []
}
let child = ElementNode {
name = "b",
namespace = "",
parent = Just parentEl,
previous = Just sibling,
attributes = []
}
let selector1 = compile (Element [Tag "a"])
selector1 parentEl `shouldBe` True
selector1 sibling `shouldBe` False
selector1 child `shouldBe` False
let selector2 = compile (Element [Class "external"])
selector2 parentEl `shouldBe` True
selector2 sibling `shouldBe` False
selector2 child `shouldBe` False
let selector3 = compile (Element [Id "mysite"])
selector3 parentEl `shouldBe` True
selector3 sibling `shouldBe` False
selector3 child `shouldBe` False
let selector4 = compile (Element [Property Nothing "lang" Exists])
selector4 parentEl `shouldBe` True
selector4 sibling `shouldBe` False
selector4 child `shouldBe` False
let selector5 = compile (Element [Property Nothing "class" $ Include "secure"])
selector5 parentEl `shouldBe` True
selector5 sibling `shouldBe` False
selector5 child `shouldBe` False
let selector6 = compile (Element [Property Nothing "href" $ Prefix "https://"])
selector6 parentEl `shouldBe` True
selector6 sibling `shouldBe` False
selector6 child `shouldBe` False
let selector7 = compile (Element [Property Nothing "href" $ Suffix ".html"])
selector7 parentEl `shouldBe` True
selector7 sibling `shouldBe` False
selector7 child `shouldBe` False
let selector8 = compile (Element [Property Nothing "href" $ Substring ".geek.nz"])
selector8 parentEl `shouldBe` True
selector8 sibling `shouldBe` False
selector8 child `shouldBe` False
let selector9 = compile (Element [Property Nothing "lang" $ Dash "en"])
selector9 parentEl `shouldBe` True
selector9 sibling `shouldBe` False
selector9 child `shouldBe` False
let selectorA = compile (Element [Property Nothing "lang" $ Dash "en-US"])
selectorA parentEl `shouldBe` True
selectorA sibling `shouldBe` False
selectorA child `shouldBe` False
let selectorB = compile (Element [Property Nothing "lang" $ Dash "en-UK"])
selectorB parentEl `shouldBe` False
selectorB sibling `shouldBe` False
selectorB child `shouldBe` False
-- TODO These could be tested better.
let selectorC = compile $ Child (Element [Tag "a"]) [Tag "b"]
selectorC parentEl `shouldBe` False
selectorC sibling `shouldBe` False
selectorC child `shouldBe` True
let selectorD = compile $ Descendant (Element [Tag "a"]) [Tag "b"]
selectorD parentEl `shouldBe` False
selectorD sibling `shouldBe` False
selectorD child `shouldBe` True
let selectorE = compile $ Sibling (Element [Tag "img"]) [Tag "b"]
selectorE parentEl `shouldBe` False
selectorE sibling `shouldBe` False
selectorE child `shouldBe` True
let selectorF = compile $ Adjacent (Element [Tag "img"]) [Tag "b"]
selectorF parentEl `shouldBe` False
selectorF sibling `shouldBe` False
selectorF child `shouldBe` True
describe "Style resolution" $ do
it "respects selector specificity" $ do
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [Attribute "class" "" "link"]
}
let rules = parse queryable "a.link {color: green} a {color: red}"
let VarParser _ (TrivialPropertyParser style) = cascade rules el [] temp::(VarParser TrivialPropertyParser)
style ! "color" `shouldBe` [Ident "green"]
it "respects syntax order" $ do
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [Attribute "class" "" "link"]
}
let rules = parse queryable "a {color: red; color: green}"
let VarParser _ (TrivialPropertyParser style) = cascade rules el [] temp::(VarParser TrivialPropertyParser)
style ! "color" `shouldBe` [Ident "green"]
let rules2 = parse queryable "a {color: red} a {color: green}"
let VarParser _ (TrivialPropertyParser style2) = cascade rules2 el [] temp::(VarParser TrivialPropertyParser)
style2 ! "color" `shouldBe` [Ident "green"]
it "respects stylesheet precedence" $ do
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [Attribute "class" "" "link"]
}
let rules = parse (queryable {priority = 1}) "a {color: green}"
let rules2 = parse (rules {priority = 2}) "a {color: red}" :: QueryableStyleSheet (VarParser TrivialPropertyParser)
let VarParser _ (TrivialPropertyParser style) = cascade rules2 el [] temp::(VarParser TrivialPropertyParser)
style ! "color" `shouldBe` [Ident "green"]
let el' = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [Attribute "class" "" "link"]
}
let rules' = parse (queryable {priority = 1}) "a {color: red}"
let rules2' = parse (rules' {priority = 2}) "a {color: green !important}" :: QueryableStyleSheet (VarParser TrivialPropertyParser)
let VarParser _ (TrivialPropertyParser style') = cascade rules2' el' [] temp::(VarParser TrivialPropertyParser)
style' ! "color" `shouldBe` [Ident "green"]
it "respects overrides" $ do
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = [Attribute "class" "" "link"]
}
let rules = parse queryable "a {color: red;}"
let VarParser _ (TrivialPropertyParser style) = cascade rules el [("color", [Ident "green"])] temp::(VarParser TrivialPropertyParser)
style ! "color" `shouldBe` [Ident "green"]
describe "Parser freezes" $ do
it "does not regress" $ do
parse emptyStyle "output: {content: 'Output'; pitch: high}"
`shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "output"]) [] ""
] -- Turned out to just be incorrect parsing
parse emptyStyle "input, output {content: attr(value)}"
`shouldBe` TrivialStyleSheet [
StyleRule (Element [Tag "output"]) [
("content", [Function "attr", Ident "value", RightParen])
] "",
StyleRule (Element [Tag "input"]) [
("content", [Function "attr", Ident "value", RightParen])
] ""
]
it "paren balancing" $ do
scanValue [RightParen] `shouldBe` ([], [RightParen])
scanValue [LeftParen] `shouldBe` ([LeftParen], [])
scanValue [Function "fn", LeftParen] `shouldBe` ([Function "fn", LeftParen], [])
scanValue [Function "fn", Ident "arg", LeftParen] `shouldBe`
([Function "fn", Ident "arg", LeftParen], [])
describe "CSS Variables" $ do
it "are captured" $ do
let parser = temp :: VarParser TrivialPropertyParser
vars parser `shouldBe` []
let parser1 = setVars [("--var", [Ident "value"])] parser
vars parser1 `shouldBe` [("--var", [Ident "value"])]
let parser2 = fromJust $ longhand parser parser1 "property" [Function "var", Ident "--var", RightParen]
vars parser2 `shouldBe` [("--var", [Ident "value"])]
let VarParser _ (TrivialPropertyParser style) = parser2
style ! "property" `shouldBe` [Ident "value"]
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = []
}
let rules = parse queryable "a {--var: value}"
let VarParser v _ = cascade rules el [] temp
v `shouldBe` [("--var", [Ident "value"])]
it "applies within element" $ do
let el = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = []
}
let rules = parse queryable "a {--link: #f00; color: var(--link)}"
let VarParser vars (TrivialPropertyParser style) = cascade rules el [] temp
style ! "color" `shouldBe` [Hash HId "f00"]
style ! "--link" `shouldBe` [Hash HId "f00"]
vars `shouldBe` [("--link", [Hash HId "f00"])]
it "inherits" $ do
let parent = ElementNode {
name = "a",
namespace = "",
parent = Nothing,
previous = Nothing,
attributes = []
}
let el = ElementNode {
name = "b",
namespace = "",
parent = Just parent,
previous = Nothing,
attributes = []
}
let rules = parse queryable "a {--link: #f00} b {color: var(--link)}"
let VarParser vars (TrivialPropertyParser style) = cascade rules el [] $ cascade rules parent [] temp
vars `shouldBe` [("--link", [Hash HId "f00"])]
style ! "color" `shouldBe` [Hash HId "f00"]
describe "Conditional @rules" $ do
it "handles normal rules" $ do
let TrivialStyleSheet styles = resolve' $ parse conditional "a {color: green}"
styles `shouldBe` [StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@rule; a {color: green}"
styles `shouldBe` [StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "a {color: green} @rule;"
styles `shouldBe` [StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "a {color: green} @font {}"
styles `shouldBe` [StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@font {} a {color: green}"
styles `shouldBe` [StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
it "handles @document" $ do
let TrivialStyleSheet styles = resolve' $ parse conditional "@document url(about:blank) { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@document url(about:credits) { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@document url-prefix('about:') { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@document url-prefix('https:') { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@document media-document('test') { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@document media-document('other') { a {color: red} }"
styles `shouldBe` []
it "handles @media" $ do
let TrivialStyleSheet styles = resolve' $ parse conditional "@media test { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media screen { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media test or screen { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media test or test {a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media screen or screen {a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media screen or test {a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media test and screen { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media test and test { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media screen and screen { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media screen and test {a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media 2 < 3 { a {color: green} }"
styles `shouldBe` [StyleRule (Element []) [] "", StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""]
let TrivialStyleSheet styles = resolve' $ parse conditional "@media 2 < 2 { a {color: red} }"
styles `shouldBe` []
let TrivialStyleSheet styles = resolve' $ parse conditional "@media 2 < 1 { a {color: red} }"
styles `shouldBe` []
it "handles @import" $ do
let styles = parse conditional "@import url(about:style.css);"
extractImports' styles `shouldBe` [URI "about:" Nothing "style.css" "" ""]
let styles = parse conditional "@import 'about:style.css';"
extractImports' styles `shouldBe` [URI "about:" Nothing "style.css" "" ""]
let styles = parse conditional "@import url(about:style.css) test;"
extractImports' styles `shouldBe` [URI "about:" Nothing "style.css" "" ""]
let styles = parse conditional "@import url(about:style.css) screen;"
extractImports' styles `shouldBe` []
-- TODO @supports is harder to test
styleIndex :: StyleIndex
styleIndex = new
queryable :: QueryableStyleSheet (VarParser TrivialPropertyParser)
queryable = queryableStyleSheet
emptyStyle :: TrivialStyleSheet
emptyStyle = TrivialStyleSheet []
conditional :: ConditionalStyles TrivialPropertyParser
conditional = conditionalStyles (fromJust $ parseURI "about:blank") "test"
linkStyle :: TrivialStyleSheet
linkStyle = TrivialStyleSheet [sampleRule]
sampleRule :: StyleRule
sampleRule = StyleRule (Element [Tag "a"]) [("color", [Ident "green"])] ""
resolve' = resolve (\var -> B (var == "test")) evalToken emptyStyle
where
evalToken (Number _ (NVInteger x)) = N $ fromInteger x
evalToken (Number _ (NVNumber x)) = N $ toRealFloat x
evalToken _ = B False
extractImports' = extractImports (\var -> B (var == "test")) evalToken
where
evalToken (Number _ (NVInteger x)) = N $ fromInteger x
evalToken (Number _ (NVNumber x)) = N $ toRealFloat x
evalToken _ = B False