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type_construction_test.rb
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6575 lines (5409 loc) · 152 KB
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require "test_helper"
class TypeConstructionTest < Minitest::Test
include TestHelper
include TypeErrorAssertions
include FactoryHelper
include SubtypingHelper
include TypeConstructionHelper
Namespace = RBS::Namespace
Typing = Steep::Typing
ConstantEnv = Steep::TypeInference::ConstantEnv
TypeEnv = Steep::TypeInference::TypeEnv
TypeConstruction = Steep::TypeConstruction
Annotation = Steep::AST::Annotation
Context = Steep::TypeInference::Context
LocalVariableTypeEnv = Steep::TypeInference::LocalVariableTypeEnv
AST = Steep::AST
MethodCall = Steep::TypeInference::MethodCall
DEFAULT_SIGS = <<-EOS
interface _A
def `+`: (_A) -> _A
end
interface _B
end
interface _C
def f: () -> _A
def g: (_A, ?_B) -> _B
def h: (a: _A, ?b: _B) -> _C
end
interface _D
def foo: () -> untyped
end
interface _X
def f: () { (_A) -> _D } -> _C
end
interface _Kernel
def foo: (_A) -> _B
| (_C) -> _D
end
interface _PolyMethod
def snd: [A] (untyped, A) -> A
def try: [A] { (untyped) -> A } -> A
end
module Foo[A]
end
EOS
def with_checker(*files, no_default: false, &block)
unless no_default
files << DEFAULT_SIGS
end
super(*files, &block)
end
def test_lvar_with_annotation
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _A
x = (_ = nil)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("untyped"), typing.type_of(node: source.node)
assert_empty typing.errors
end
end
end
def test_lvar_with_annotation_type_check
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _B
# @type var z: _A
x = (_ = nil)
z = x
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_B"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
assert_incompatible_assignment typing.errors[0],
lhs_type: parse_type("::_A"),
rhs_type: parse_type("::_B") do |error|
assert_equal :lvasgn, error.node.type
assert_equal :z, error.node.children[0].name
end
end
end
end
def test_lvar_without_annotation_infer
with_checker do |checker|
source = parse_ruby(<<-EOF)
x = 1
z = x
EOF
with_standard_construction(checker, source) do |construction, typing|
pair = construction.synthesize(source.node)
assert_equal parse_type("::Integer"), typing.type_of(node: source.node)
assert_nil typing.context_at(line: 1, column: 0).lvar_env[:x]
assert_nil typing.context_at(line: 1, column: 0).lvar_env[:z]
assert_equal parse_type("::Integer"), typing.context_at(line: 1, column: 5).lvar_env[:x]
assert_nil typing.context_at(line: 1, column: 5).lvar_env[:z]
assert_equal parse_type("::Integer"), pair.context.lvar_env[:x]
assert_equal parse_type("::Integer"), pair.context.lvar_env[:z]
assert_empty typing.errors
end
end
end
def test_lvar_without_annotation_redef
with_checker do |checker|
source = parse_ruby(<<-EOF)
x = 1
x = ""
EOF
with_standard_construction(checker, source) do |construction, typing|
pair = construction.synthesize(source.node)
assert_equal parse_type("::String"), typing.type_of(node: source.node)
assert_nil typing.context_at(line: 1, column: 0).lvar_env[:x]
assert_equal parse_type("::Integer"), typing.context_at(line: 1, column: 5).lvar_env[:x]
assert_equal parse_type("::String"), pair.context.lvar_env[:x]
assert_empty typing.errors
end
end
end
def test_lvar_with_annotation_inference
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _A
x = (_ = nil)
z = x
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_A"), typing.type_of(node: source.node)
assert_empty typing.errors
end
end
end
def test_method_call
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
x = (_ = nil)
x.f
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_no_error typing
assert_equal parse_type("::_A"), typing.type_of(node: source.node)
end
end
end
def test_method_call_with_argument
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
# @type var y: _A
x = (_ = nil)
y = (_ = nil)
x.g(y)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_B"), typing.type_of(node: source.node)
assert_empty typing.errors
end
end
end
def test_method_call_incompatible_argument_type
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
# @type var y: _B
x = (_ = nil)
y = (_ = nil)
x.g(y)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_B"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
assert_argument_type_mismatch typing.errors[0],
expected: parse_type("::_A"),
actual: parse_type("::_B")
end
end
end
def test_method_call_no_error_if_any
with_checker do |checker|
source = parse_ruby(<<-EOF)
x = (_ = nil)
x.no_such_method
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("untyped"), typing.type_of(node: source.node)
assert_empty typing.errors
end
end
end
def test_method_call_no_method_error
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
x = (_ = nil)
x.no_such_method
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("untyped"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
assert_no_method_error typing.errors.first, method: :no_such_method, type: parse_type("::_C")
end
end
end
def test_method_call_missing_argument
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _A
# @type var a: _C
a = (_ = nil)
x = (_ = nil)
a.g()
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_B"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
typing.errors.first.tap do |error|
assert_instance_of Steep::Errors::IncompatibleArguments, error
assert_equal parse_method_type("(::_A, ?::_B) -> ::_B"), error.method_type
end
end
end
end
def test_method_call_extra_args
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _A
# @type var a: _C
a = (_ = nil)
x = (_ = nil)
a.g(_ = nil, _ = nil, _ = nil)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_B"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
typing.errors.first.tap do |error|
assert_instance_of Steep::Errors::IncompatibleArguments, error
assert_equal parse_method_type("(::_A, ?::_B) -> ::_B"), error.method_type
end
end
end
end
def test_keyword_call
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
# @type var a: _A
# @type var b: _B
x = (_ = nil)
a = (_ = nil)
b = (_ = nil)
x.h(a: a, b: b)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_C"), typing.type_of(node: source.node)
assert_empty typing.errors
end
end
end
def test_keyword_missing
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
x = (_ = nil)
x.h()
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_C"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
typing.errors.first.tap do |error|
assert_instance_of Steep::Errors::IncompatibleArguments, error
assert_equal parse_method_type("(a: ::_A, ?b: ::_B) -> ::_C"), error.method_type
end
end
end
end
def test_extra_keyword_given
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
x = (_ = nil)
x.h(a: (_ = nil), b: (_ = nil), c: (_ = nil))
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_C"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
typing.errors.first.tap do |error|
assert_instance_of Steep::Errors::UnexpectedKeyword, error
assert_equal Set.new([:c]), error.unexpected_keywords
end
end
end
end
def test_keyword_typecheck
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _C
# @type var y: _B
x = (_ = nil)
y = (_ = nil)
x.h(a: y)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("::_C"), typing.type_of(node: source.node)
assert_equal 1, typing.errors.size
assert_incompatible_assignment typing.errors[0],
lhs_type: parse_type("::_A"),
rhs_type: parse_type("::_B")
end
end
end
def test_def_no_params
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo
# @type var x: _A
x = (_ = nil)
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("untyped"), typing.type_of(node: dig(source.node, 2))
assert_equal parse_type("::_A"), typing.context_at(line: 4, column: 0).lvar_env[:x]
end
end
end
def test_def_param
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo(x)
# @type var x: _A
y = x
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
def_body = source.node.children[2]
assert_equal parse_type("::_A"), typing.type_of(node: def_body)
assert_equal parse_type("::_A"), typing.type_of(node: def_body.children[1])
end
end
end
def test_def_param_error
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo(x, y = x)
# @type var x: _A
# @type var y: _C
x
y
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
refute_empty typing.errors
assert_incompatible_assignment typing.errors[0],
lhs_type: parse_type("::_C"),
rhs_type: parse_type("::_A | ::_C") do |error|
assert_equal :optarg, error.node.type
assert_equal :y, error.node.children[0].name
end
x = dig(source.node, 2, 0)
y = dig(source.node, 2, 1)
assert_equal parse_type("::_A"), typing.type_of(node: x)
assert_equal parse_type("::_C"), typing.type_of(node: y)
end
end
end
def test_def_kw_param_error
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo(x:, y: x)
# @type var x: _A
# @type var y: _C
x
y
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
refute_empty typing.errors
assert_incompatible_assignment typing.errors[0],
lhs_type: parse_type("::_C"),
rhs_type: parse_type("::_A | ::_C") do |error|
assert_equal :kwoptarg, error.node.type
assert_equal :y, error.node.children[0].name
end
x = dig(source.node, 2, 0)
y = dig(source.node, 2, 1)
assert_equal parse_type("::_A"), typing.type_of(node: x)
assert_equal parse_type("::_C"), typing.type_of(node: y)
end
end
end
def test_def_optional_param
with_checker <<RBS do |checker|
class TestDefOptional
def foo: (?Array[String], ?b: Hash[Symbol, Integer]) -> void
end
RBS
source = parse_ruby(<<-RUBY)
class TestDefOptional
def foo(a = [], b: {})
end
end
RUBY
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_no_error typing
end
end
end
def test_block
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var a: _X
a = (_ = nil)
b = a.f do |x|
# @type var x: _A
# @type var y: _B
y = (_ = nil)
x
y
end
a
b
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
a = dig(source.node, 2)
b = dig(source.node, 3)
x = dig(source.node, 1, 1, 2, 1)
y = dig(source.node, 1, 1, 2, 2)
assert_equal parse_type("::_X"), typing.type_of(node: a)
assert_equal parse_type("::_C"), typing.type_of(node: b)
assert_equal parse_type("::_A"), typing.type_of(node: x)
assert_equal parse_type("::_B"), typing.type_of(node: y)
end
end
end
def test_block_shadow
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var a: _X
a = (_ = nil)
a.f do |a|
# @type var a: _A
b = a
end
EOF
with_standard_construction(checker, source) do |construction, typing|
pair = construction.synthesize(source.node)
assert_equal parse_type("::_X"), pair.context.lvar_env[:a]
assert_equal parse_type("::_A"), typing.context_at(line: 6, column: 0).lvar_env[:a]
assert_nil typing.context_at(line: 6, column: 0).lvar_env[:b]
assert_equal parse_type("::_A"), typing.context_at(line: 7, column: 0).lvar_env[:a]
assert_equal parse_type("::_A"), typing.context_at(line: 7, column: 0).lvar_env[:b]
end
end
end
def test_block_param_type
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _X
x = (_ = nil)
x.f do |a|
# @type var d: _D
a
d = (_ = nil)
end
EOF
with_standard_construction(checker, source) do |construction, typing|
pair = construction.synthesize(source.node)
assert_no_error typing
assert_equal parse_type("::_X"), pair.context.lvar_env[:x]
assert_nil pair.context.lvar_env[:a]
assert_nil pair.context.lvar_env[:d]
block_context = typing.context_at(line: 8, column: 0)
assert_equal parse_type("::_A"), block_context.lvar_env[:a]
assert_equal parse_type("::_X"), block_context.lvar_env[:x]
assert_equal parse_type("::_D"), block_context.lvar_env[:d]
end
end
end
def test_block_extra_missing_params
with_checker(<<-RBS) do |checker|
class M1
def foo: () { (Integer, String, bool) -> void } -> void
end
class M2
def foo: () { (String, Integer) -> void } -> void
end
RBS
source = parse_ruby(<<-EOF)
x = [M1.new, M2.new][0]
x.foo do |a|
nil
end
x.foo do |a, b, c|
nil
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_no_error typing
end
end
end
def test_block_value_type
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _X
x = (_ = nil)
x.f do |a|
a
end
EOF
with_standard_construction(checker, source) do |construction, typing|
pair = construction.synthesize(source.node)
assert_equal 1, typing.errors.size
assert_block_type_mismatch typing.errors[0],
expected: "^(::_A) -> ::_D",
actual: "^(::_A) -> ::_A"
assert_equal parse_type("::_X"), pair.context.lvar_env[:x]
end
end
end
def test_block_break_type
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: _X
x = (_ = nil)
x.f do |a|
break a
# @type var d: _D
d = (_ = nil)
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
# break a
# ^
assert_equal parse_type("::_A"), typing.type_of(node: dig(source.node, 1, 2, 0, 0))
assert_equal 1, typing.errors.size
assert_break_type_mismatch typing.errors[0], expected: parse_type("::_C"), actual: parse_type("::_A")
end
end
end
def test_return_type_annotation
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo()
# @type return: _A
# @type var a: _A
a = (_ = nil)
return a
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_return_error
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo()
# @type return: _X
# @type var a: _A
a = (_ = nil)
return a
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_any typing.errors do |error|
error.is_a?(Steep::Errors::ReturnTypeMismatch) && error.expected == parse_type("::_X") && error.actual == parse_type("::_A")
end
end
end
end
def test_return_hint
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo()
# @type return: Array[Integer]
return []
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_constant_annotation
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type const Hello: Integer
# @type var hello: Integer
hello = Hello
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_constant_annotation2
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type const Hello::World: Integer
Hello::World = ""
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_any typing.errors do |error|
error.is_a?(Steep::Errors::IncompatibleAssignment)
end
assert_equal parse_type("::Integer"), typing.type_of(node: source.node)
end
end
end
def test_constant_signature
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var x: String
x = String
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_any typing.errors do |error|
error.is_a?(Steep::Errors::IncompatibleAssignment)
end
end
end
end
def test_constant_signature2
with_checker <<-EOS do |checker|
X: Module
EOS
source = parse_ruby(<<-EOF)
X = 3
# @type var x: String
x = X
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal 2, typing.errors.size
assert typing.errors.all? {|error| error.is_a?(Steep::Errors::IncompatibleAssignment) }
end
end
end
def test_overloaded_method
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var k: _Kernel
# @type var a: _A
# @type var c: _C
k = (_ = nil)
a = (_ = nil)
c = (_ = nil)
# @type var b: _B
b = k.foo(a)
# @type var d: _D
d = k.foo(c)
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_overloaded_method2
with_checker <<-EOF do |checker|
class Hello
def foo: (Integer) -> void
| (String) -> void
end
EOF
source = parse_ruby(<<-EOF)
Hello.new.foo([])
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_typing_error(typing, size: 2) do |errors|
errors[0].tap do |error|
assert_instance_of Steep::Errors::FallbackAny, error
end
errors[1].tap do |error|
assert_instance_of Steep::Errors::UnresolvedOverloading, error
assert_equal parse_type("::Hello"), error.receiver_type
assert_equal :foo, error.method_name
assert_equal [parse_method_type("(::Integer) -> void"), parse_method_type("(::String) -> void")],
error.method_types
end
end
end
end
end
def test_ivar_types
with_checker do |checker|
source = parse_ruby(<<-EOF)
def foo
# @type ivar @x: _A
# @type var y: _D
y = (_ = nil)
@x = y
y = @x
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal 2, typing.errors.size
assert_any typing.errors do |error|
error.is_a?(Steep::Errors::IncompatibleAssignment) &&
error.node.type == :ivasgn &&
error.node.children[0] == :"@x"
end
assert_any typing.errors do |error|
error.is_a?(Steep::Errors::IncompatibleAssignment) &&
error.node.type == :lvasgn &&
error.node.children[1].type == :ivar &&
error.node.children[1].children[0] == :"@x"
end
end
end
end
def test_poly_method_arg
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var poly: _PolyMethod
poly = (_ = nil)
# @type var string: String
string = poly.snd(1, "a")
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_poly_method_block
with_checker do |checker|
source = parse_ruby(<<-EOF)
# @type var poly: _PolyMethod
poly = (_ = nil)
# @type var string: String
string = poly.try { "string" }
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_union_type
with_checker do |checker|
source = parse_ruby("1")
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_equal parse_type("_A | _C"),
construction.union_type(parse_type("_A"), parse_type("_C"))
assert_equal parse_type("_A"),
construction.union_type(parse_type("_A"), parse_type("_A"))
end
end
end
def test_module_self
with_checker do |checker|
source = parse_ruby(<<-EOF)
module Foo
# @implements Foo[A]
block_given?
end
EOF
with_standard_construction(checker, source) do |construction, typing|
construction.synthesize(source.node)
assert_empty typing.errors
end
end
end
def test_class_constructor_with_signature
with_checker <<-EOS do |checker|
class Person end
EOS
source = parse_ruby("class Person; end")
with_standard_construction(checker, source) do |construction, typing|
for_class = construction.for_class(source.node)
assert_equal(
Annotation::Implements::Module.new(name: TypeName("::Person"), args: []),
for_class.module_context.implement_name
)
assert_equal parse_type("::Person"), for_class.module_context.instance_type
assert_equal parse_type("singleton(::Person)"), for_class.module_context.module_type
end
end
end
def test_class_constructor_without_signature
with_checker <<-EOF do |checker|
class Address