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reference_finder_test.rb
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388 lines (297 loc) · 8.59 KB
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# typed: true
# frozen_string_literal: true
require "test_helper"
module RubyIndexer
class ReferenceFinderTest < Minitest::Test
def test_finds_constant_references
refs = find_const_references("Foo::Bar", <<~RUBY)
module Foo
class Bar
end
Bar
end
Foo::Bar
RUBY
assert_equal("Bar", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("Bar", refs[1].name)
assert_equal(5, refs[1].location.start_line)
assert_equal("Foo::Bar", refs[2].name)
assert_equal(8, refs[2].location.start_line)
end
def test_finds_constant_references_inside_singleton_contexts
refs = find_const_references("Foo::<Class:Foo>::Bar", <<~RUBY)
class Foo
class << self
class Bar
end
Bar
end
end
RUBY
assert_equal("Bar", refs[0].name)
assert_equal(3, refs[0].location.start_line)
assert_equal("Bar", refs[1].name)
assert_equal(6, refs[1].location.start_line)
end
def test_finds_top_level_constant_references
refs = find_const_references("Bar", <<~RUBY)
class Bar
end
class Foo
::Bar
class << self
::Bar
end
end
RUBY
assert_equal("Bar", refs[0].name)
assert_equal(1, refs[0].location.start_line)
assert_equal("::Bar", refs[1].name)
assert_equal(5, refs[1].location.start_line)
assert_equal("::Bar", refs[2].name)
assert_equal(8, refs[2].location.start_line)
end
def test_finds_method_references
refs = find_method_references("foo", <<~RUBY)
class Bar
def foo
end
def baz
foo
end
end
RUBY
assert_equal(2, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(6, refs[1].location.start_line)
end
def test_does_not_mismatch_on_readers_and_writers
refs = find_method_references("foo", <<~RUBY)
class Bar
def foo
end
def foo=(value)
end
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo` but not `foo=`
assert_equal(2, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(10, refs[1].location.start_line)
end
def test_matches_writers
refs = find_method_references("foo=", <<~RUBY)
class Bar
def foo
end
def foo=(value)
end
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo=` but not `foo`
assert_equal(2, refs.size)
assert_equal("foo=", refs[0].name)
assert_equal(5, refs[0].location.start_line)
assert_equal("foo=", refs[1].name)
assert_equal(9, refs[1].location.start_line)
end
def test_matches_attr_writer_with_call_node_argument
refs = find_method_references("foo=", <<~RUBY)
class Bar
attr_reader :foo, bar
def baz
self.foo = 1
self.foo
end
end
RUBY
assert_equal(1, refs.size)
assert_equal("foo=", refs[0].name)
assert_equal(5, refs[0].location.start_line)
end
def test_matches_attr_writer
refs = find_method_references("foo=", <<~RUBY)
class Bar
def foo
end
attr_writer :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo=` but not `foo`
assert_equal(2, refs.size)
assert_equal("foo=", refs[0].name)
assert_equal(5, refs[0].location.start_line)
assert_equal("foo=", refs[1].name)
assert_equal(8, refs[1].location.start_line)
end
def test_matches_attr_reader
refs = find_method_references("foo", <<~RUBY)
class Bar
def foo=(value)
end
attr_reader :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo=` but not `foo`
assert_equal(2, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(5, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(9, refs[1].location.start_line)
end
def test_matches_attr_accessor
refs = find_method_references("foo=", <<~RUBY)
class Bar
attr_accessor :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo=` but not `foo`
assert_equal(2, refs.size)
assert_equal("foo=", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo=", refs[1].name)
assert_equal(5, refs[1].location.start_line)
refs = find_method_references("foo", <<~RUBY)
class Bar
attr_accessor :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(6, refs[1].location.start_line)
end
def test_matches_attr_accessor_multi
refs = find_method_references("foo=", <<~RUBY)
class Bar
attr_accessor :bar, :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
# We want to match `foo=` but not `foo`
assert_equal(2, refs.size)
assert_equal("foo=", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo=", refs[1].name)
assert_equal(5, refs[1].location.start_line)
refs = find_method_references("foo", <<~RUBY)
class Bar
attr_accessor :bar, :foo
def baz
self.foo = 1
self.foo
end
end
RUBY
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(6, refs[1].location.start_line)
end
def test_find_inherited_methods
refs = find_method_references("foo", <<~RUBY)
class Bar
def foo
end
end
class Baz < Bar
super.foo
end
RUBY
assert_equal(2, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(7, refs[1].location.start_line)
end
def test_finds_methods_created_in_mixins
refs = find_method_references("foo", <<~RUBY)
module Mixin
def foo
end
end
class Bar
include Mixin
end
Bar.foo
RUBY
assert_equal(2, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(2, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(10, refs[1].location.start_line)
end
def test_finds_singleton_methods
# The current implementation matches on both `Bar.foo` and `Bar#foo` even though they are different
refs = find_method_references("foo", <<~RUBY)
class Bar
class << self
def foo
end
end
def foo
end
end
Bar.foo
RUBY
assert_equal(3, refs.size)
assert_equal("foo", refs[0].name)
assert_equal(3, refs[0].location.start_line)
assert_equal("foo", refs[1].name)
assert_equal(7, refs[1].location.start_line)
assert_equal("foo", refs[2].name)
assert_equal(11, refs[2].location.start_line)
end
private
def find_const_references(const_name, source)
target = ReferenceFinder::ConstTarget.new(const_name)
find_references(target, source)
end
def find_method_references(method_name, source)
target = ReferenceFinder::MethodTarget.new(method_name)
find_references(target, source)
end
def find_references(target, source)
file_path = "/fake.rb"
index = Index.new
index.index_single(IndexablePath.new(nil, file_path), source)
parse_result = Prism.parse(source)
dispatcher = Prism::Dispatcher.new
finder = ReferenceFinder.new(target, index, dispatcher)
dispatcher.visit(parse_result.value)
finder.references
end
end
end