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test_source_comment_associator.rb
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/
test_source_comment_associator.rb
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# frozen_string_literal: true
require 'helper'
require 'parser/ruby18'
class TestSourceCommentAssociator < Minitest::Test
def parse_with_comments(code)
parser = Parser::Ruby18.new
buffer = Parser::Source::Buffer.new('(comments)')
buffer.source = code
parser.parse_with_comments(buffer)
end
def associate(code)
ast, comments = parse_with_comments(code)
associations = Parser::Source::Comment.associate(ast, comments)
[ ast, associations ]
end
def associate_locations(code)
ast, comments = parse_with_comments(code)
associations = Parser::Source::Comment.associate_locations(ast, comments)
[ ast, associations ]
end
def associate_by_identity(code)
ast, comments = parse_with_comments(code)
associations = Parser::Source::Comment.associate_by_identity(ast, comments)
[ ast, associations ]
end
def test_associate
ast, associations = associate(<<-END)
#!/usr/bin/env ruby
# coding: utf-8
# class preceding
# another class preceding
class Foo # class keyword line
# method foo preceding
def foo
puts 'foo'
end # method foo decorating
# method bar preceding
def bar
# expression preceding
1 + # 1 decorating
2
# method bar sparse
end # method bar decorating
# class sparse
end # class decorating
END
klass_node = ast
klass_name_node = klass_node.children[0]
foo_node = klass_node.children[2].children[0] # def foo
bar_node = klass_node.children[2].children[1] # def bar
expr_node = bar_node.children[2] # 1 + 2
one_node = expr_node.children[0] # 1
assert_equal 6, associations.size
assert_equal [
'# class preceding',
'# another class preceding',
'# class sparse',
'# class decorating'
], associations[klass_node].map(&:text)
assert_equal [
'# class keyword line'
], associations[klass_name_node].map(&:text)
assert_equal [
'# method foo preceding',
'# method foo decorating'
], associations[foo_node].map(&:text)
assert_equal [
'# method bar preceding',
'# method bar sparse',
'# method bar decorating'
], associations[bar_node].map(&:text)
assert_equal [
'# expression preceding'
], associations[expr_node].map(&:text)
assert_equal [
'# 1 decorating'
], associations[one_node].map(&:text)
end
def setup_dupe_statement(method = :associate)
@ast, @associations = send(method, <<-END)
class Foo
def bar
f1 # comment on 1st call to f1
f2
f1 # comment on 2nd call to f1
end
end
END
_klass_node = @ast
@method_node = @ast.children[2]
@body = @method_node.children[2]
@f1_1_node = @body.children[0]
@f1_2_node = @body.children[2]
end
# The bug below is fixed by using associate_locations
def test_associate_dupe_statement
setup_dupe_statement
assert_equal 1, @associations.size
assert_equal ['# comment on 1st call to f1', '# comment on 2nd call to f1'],
@associations[@f1_1_node].map(&:text)
assert_equal ['# comment on 1st call to f1', '# comment on 2nd call to f1'],
@associations[@f1_2_node].map(&:text)
end
def test_associate_by_identity_dupe_statement
setup_dupe_statement(:associate_by_identity)
assert_equal 2, @associations.size
assert_equal ['# comment on 1st call to f1'],
@associations[@f1_1_node].map(&:text)
assert_equal ['# comment on 2nd call to f1'],
@associations[@f1_2_node].map(&:text)
end
def test_associate_locations
ast, associations = associate_locations(<<-END)
#!/usr/bin/env ruby
# coding: utf-8
# class preceding
# another class preceding
class Foo # class keyword line
# method foo preceding
def foo
puts 'foo'
end # method foo decorating
# method bar preceding
def bar
# expression preceding
1 + # 1 decorating
2
# method bar sparse
end # method bar decorating
# class sparse
end # class decorating
END
klass_node = ast
klass_name_node = klass_node.children[0]
foo_node = klass_node.children[2].children[0] # def foo
bar_node = klass_node.children[2].children[1] # def bar
expr_node = bar_node.children[2] # 1 + 2
one_node = expr_node.children[0] # 1
assert_equal 6, associations.size
assert_equal [
'# class preceding',
'# another class preceding',
'# class sparse',
'# class decorating'
], associations[klass_node.loc].map(&:text)
assert_equal [
'# class keyword line'
], associations[klass_name_node.loc].map(&:text)
assert_equal [
'# method foo preceding',
'# method foo decorating'
], associations[foo_node.loc].map(&:text)
assert_equal [
'# method bar preceding',
'# method bar sparse',
'# method bar decorating'
], associations[bar_node.loc].map(&:text)
assert_equal [
'# expression preceding'
], associations[expr_node.loc].map(&:text)
assert_equal [
'# 1 decorating'
], associations[one_node.loc].map(&:text)
end
def test_associate_locations_dupe_statement
ast, associations = associate_locations(<<-END)
class Foo
def bar
f1 # comment on 1st call to f1
f2
f1 # comment on 2nd call to f1
end
end
END
_klass_node = ast
method_node = ast.children[2]
body = method_node.children[2]
f1_1_node = body.children[0]
f1_2_node = body.children[2]
assert_equal 2, associations.size
assert_equal ['# comment on 1st call to f1'],
associations[f1_1_node.loc].map(&:text)
assert_equal ['# comment on 2nd call to f1'],
associations[f1_2_node.loc].map(&:text)
end
def test_associate_no_body
ast, associations = associate(<<-END)
# foo
class Foo
end
END
assert_equal 1, associations.size
assert_equal ['# foo'],
associations[ast].map(&:text)
end
def test_associate_empty_tree
_ast, associations = associate("")
assert_equal 0, associations.size
end
def test_associate_shebang_only
_ast, associations = associate(<<-END)
#!ruby
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_frozen_string_literal
_ast, associations = associate(<<-END)
# frozen_string_literal: true
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_frozen_string_literal_dash_star_dash
_ast, associations = associate(<<-END)
# -*- frozen_string_literal: true -*-
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_frozen_string_literal_no_space_after_colon
_ast, associations = associate(<<-END)
# frozen_string_literal:true
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_warn_indent
_ast, associations = associate(<<-END)
# warn_indent: true
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_warn_indent_dash_star_dash
_ast, associations = associate(<<-END)
# -*- warn_indent: true -*-
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_warn_past_scope
_ast, associations = associate(<<-END)
# warn_past_scope: true
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_warn_past_scope_dash_star_dash
_ast, associations = associate(<<-END)
# -*- warn_past_scope: true -*-
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_multiple
_ast, associations = associate(<<-END)
# frozen_string_literal: true; warn_indent: true
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_multiple_dash_star_dash
_ast, associations = associate(<<-END)
# -*- frozen_string_literal: true; warn_indent: true -*-
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_no_comments
_ast, associations = associate(<<-END)
class Foo
end
END
assert_equal 0, associations.size
end
def test_associate_comments_after_root_node
_ast, associations = associate(<<-END)
class Foo
end
# not associated
END
assert_equal 0, associations.size
end
def test_associate_stray_comment
ast, associations = associate(<<-END)
def foo
# foo
end
END
assert_equal 1, associations.size
assert_equal ['# foo'],
associations[ast].map(&:text)
end
def test_associate___ENCODING__
ast, associations = associate(<<-END)
# foo
__ENCODING__
END
assert_equal 1, associations.size
assert_equal ['# foo'],
associations[ast].map(&:text)
end
def test_associate_inside_heredoc
ast, associations = associate(<<-END)
<<x
\#{
foo # bar
}
x
END
begin_node = ast.children[0]
send_node = begin_node.children[0]
assert_equal 1, associations.size
assert_equal ['# bar'],
associations[send_node].map(&:text)
end
def test_associate_conditional_parent_class
ast, associations = associate(<<-END)
class Foo
# bar
class Bar
end
end if some_condition
END
if_node = ast
_condition, foo_class = if_node.children
_foo, _sub_class, bar_class = foo_class.children
assert_equal 1, associations.size
assert_equal ['# bar'],
associations[bar_class].map(&:text)
end
def test_children_in_source_order
obj = Parser::Source::Comment::Associator.new(nil, nil)
for_each_node do |node|
with_loc = node.children.select do |child|
child.is_a?(AST::Node) && child.loc && child.loc.expression
end
slow_sort = with_loc.sort_by.with_index do |child, index| # Index to ensure stable sort
[child.loc.expression.begin_pos, index]
end
optimized = obj.send(:children_in_source_order, node)
assert_equal slow_sort, optimized, "children_in_source_order incorrect for #{node}"
end
end
end