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map.coffee
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map.coffee
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sourceMap = require('source-map')
postcss = require('../lib/postcss')
fs = require('fs-extra')
describe 'source maps', ->
before ->
@dir = __dirname + '/fixtures'
@doubler = postcss (css) ->
css.eachDecl (decl) -> decl.parent.prepend(decl.clone())
@lighter = postcss (css) ->
css.eachDecl (decl) -> decl.value = 'white'
afterEach ->
fs.removeSync(@dir) if fs.existsSync(@dir)
it 'adds map field only on request', ->
postcss().process('a {}').should.not.have.property('map')
it 'generate right source map', ->
css = "a {\n color: black;\n }"
processor = postcss (css) ->
css.eachRule (rule) ->
rule.selector = 'strong'
css.eachDecl (decl) ->
changed = decl.clone(prop: 'background')
decl.parent.prepend(changed)
result = processor.process(css, from: 'a.css', to: 'b.css', map: true)
map = new sourceMap.SourceMapConsumer(result.map)
map.file.should.eql('b.css')
map.originalPositionFor(line: 1, column: 0).should.eql
source: 'a.css'
line: 1
column: 0
name: null
map.originalPositionFor(line: 2, column: 2).should.eql
source: 'a.css'
line: 2
column: 2
name: null
map.originalPositionFor(line: 3, column: 2).should.eql
source: 'a.css'
line: 2
column: 2
name: null
it 'changes previous source map', ->
css = 'a { color: black }'
doubled = @doubler.process css,
from: 'a.css'
to: 'b.css'
map: true
lighted = @lighter.process doubled.css,
from: 'b.css'
to: 'c.css'
map: doubled.map
map = new sourceMap.SourceMapConsumer(lighted.map)
map.originalPositionFor(line: 1, column: 18).should.eql
source: 'a.css'
line: 1
column: 4
name: null
it 'adds source map annotation', ->
css = 'a { }/*# sourceMappingURL=a.css.map */'
result = postcss().process css,
from: 'a.css'
to: 'b.css'
map: true
result.css.should.eql "a { }\n/*# sourceMappingURL=b.css.map */"
it 'misses source map annotation, if user ask', ->
css = 'a { }'
result = postcss().process css,
from: 'a.css'
to: 'b.css'
map: true
mapAnnotation: false
result.css.should.eql(css)
it 'misses source map annotation, if previous map missed it', ->
css = 'a { }'
step1 = postcss().process css,
from: 'a.css'
to: 'b.css'
map: true
mapAnnotation: false
step2 = postcss().process step1.css,
from: 'b.css'
to: 'c.css'
map: step1.map
step2.css.should.eql(css)
it 'generates inline map', ->
css = 'a { }'
common = postcss().process css,
from: 'a.css'
to: 'b.css'
map: true
inline = postcss().process css,
from: 'a.css'
to: 'b.css'
inlineMap: true
inline.should.not.have.property('map')
inline.css.should.match(/# sourceMappingURL=data:/)
base64 = new Buffer(common.map).toString('base64')
inline.css.should.endWith(base64 + ' */')
it 'generates inline map if previous map was inline', ->
css = 'a { color: black }'
common1 = @doubler.process css,
from: 'a.css'
to: 'b.css'
map: true
common2 = @lighter.process common1.css,
from: 'b.css'
to: 'c.css'
map: common1.map
inline1 = @doubler.process css,
from: 'a.css'
to: 'b.css'
inlineMap: true
inline2 = @lighter.process inline1.css,
from: 'b.css'
to: 'c.css'
base64 = new Buffer(common2.map).toString('base64')
inline2.css.should.endWith(base64 + ' */')
it 'allows change map type', ->
css = 'a { }'
step1 = postcss().process css,
from: 'a.css'
to: 'b.css'
inlineMap: true
step2 = postcss().process step1.css,
from: 'b.css'
to: 'c.css'
inlineMap: false
step2.should.have.property('map')
step2.css.should.not.match(/# sourceMappingURL=data:/)
it 'checks map file near CSS', ->
step1 = @doubler.process 'a { }',
from: 'a.css'
to: @dir + '/a.css'
map: true
fs.outputFileSync(@dir + '/a.css.map', step1.map)
step2 = @lighter.process step1.css,
from: @dir + '/a.css'
to: 'b.css'
step2.should.have.property('map')
it 'read map file from annotation', ->
step1 = @doubler.process 'a { }',
from: 'a.css'
to: @dir + '/a.css'
map: true
fs.outputFileSync(@dir + '/b.css.map', step1.map)
css = step1.css.replace('a.css.map', 'b.css.map')
step2 = @lighter.process css,
from: @dir + '/a.css'
to: 'c.css'
step2.should.have.property('map')
it 'miss check files on requires', ->
step1 = @doubler.process 'a { }',
from: 'a.css'
to: @dir + '/a.css'
map: true
fs.outputFileSync(@dir + '/a.css.map', step1.map)
step2 = @lighter.process step1.css,
from: @dir + '/a.css'
to: 'b.css'
map: false
step2.should.not.have.property('map')
it 'works in subdirs', ->
result = @doubler.process 'a { }',
from: 'from/a.css'
to: 'out/b.css'
map: true
result.css.should.match(/sourceMappingURL=b.css.map/)
map = new sourceMap.SourceMapConsumer(result.map)
map.file.should.eql 'b.css'
map.sources.should.eql ['../from/a.css']
it 'uses map from subdir', ->
step1 = @doubler.process 'a { }',
from: 'a.css'
to: 'out/b.css'
map: true
step2 = @doubler.process step1.css,
from: 'out/b.css'
to: 'out/c.css'
map: step1.map
map = new sourceMap.SourceMapConsumer(step2.map)
map.originalPositionFor(line: 1, column: 0).source.should.eql '../a.css'
step3 = @doubler.process step2.css,
from: 'c.css'
to: 'd.css'
map: step2.map
map = new sourceMap.SourceMapConsumer(step3.map)
map.originalPositionFor(line: 1, column: 0).source.should.eql '../a.css'