describe 'Python regular expression grammar', ->

grammar = null

beforeEach ->

waitsForPromise ->

atom.packages.activatePackage('language-python')

runs ->

grammar = atom.grammars.grammarForScopeName('source.regexp.python')

describe 'character classes', ->

it 'does not recursively match character classes', ->

{tokens} = grammar.tokenizeLine '[.:[\\]@]'

expect(tokens[0]).toEqual value: '[', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.begin.regexp']

expect(tokens[1]).toEqual value: '.:[', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp']

expect(tokens[2]).toEqual value: '\\]', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'constant.character.escape.backslash.regexp']

expect(tokens[3]).toEqual value: '@', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp']

expect(tokens[4]).toEqual value: ']', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.end.regexp']

it 'does not end the character class early if the first character is a ]', ->

{tokens} = grammar.tokenizeLine '[][]'

expect(tokens[0]).toEqual value: '[', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.begin.regexp']

expect(tokens[1]).toEqual value: '][', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp']

expect(tokens[2]).toEqual value: ']', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.end.regexp']

{tokens} = grammar.tokenizeLine '[^][]'

expect(tokens[0]).toEqual value: '[', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.begin.regexp']

expect(tokens[1]).toEqual value: '^', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'keyword.operator.negation.regexp']

expect(tokens[2]).toEqual value: '][', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp']

expect(tokens[3]).toEqual value: ']', scopes: ['source.regexp.python', 'constant.other.character-class.set.regexp', 'punctuation.definition.character-class.end.regexp']