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|
require 'test/unit'
require_relative 'envutil'
class TestRefinement < Test::Unit::TestCase
class Foo
def x
return "Foo#x"
end
def y
return "Foo#y"
end
def call_x
return x
end
end
module FooExt
refine Foo do
def x
return "FooExt#x"
end
def y
return "FooExt#y " + super
end
def z
return "FooExt#z"
end
end
end
module FooExt2
refine Foo do
def x
return "FooExt2#x"
end
def y
return "FooExt2#y " + super
end
def z
return "FooExt2#z"
end
end
end
class FooSub < Foo
def x
return "FooSub#x"
end
def y
return "FooSub#y " + super
end
end
class FooExtClient
using FooExt
def self.invoke_x_on(foo)
return foo.x
end
def self.invoke_y_on(foo)
return foo.y
end
def self.invoke_z_on(foo)
return foo.z
end
def self.send_z_on(foo)
return foo.send(:z)
end
def self.method_z(foo)
return foo.method(:z)
end
def self.invoke_call_x_on(foo)
return foo.call_x
end
end
class FooExtClient2
using FooExt
using FooExt2
def self.invoke_y_on(foo)
return foo.y
end
end
def test_override
foo = Foo.new
assert_equal("Foo#x", foo.x)
assert_equal("FooExt#x", FooExtClient.invoke_x_on(foo))
assert_equal("Foo#x", foo.x)
end
def test_super
foo = Foo.new
assert_equal("Foo#y", foo.y)
assert_equal("FooExt#y Foo#y", FooExtClient.invoke_y_on(foo))
assert_equal("Foo#y", foo.y)
end
def test_super_chain
foo = Foo.new
assert_equal("Foo#y", foo.y)
assert_equal("FooExt2#y FooExt#y Foo#y", FooExtClient2.invoke_y_on(foo))
assert_equal("Foo#y", foo.y)
end
def test_new_method
foo = Foo.new
assert_raise(NoMethodError) { foo.z }
assert_equal("FooExt#z", FooExtClient.invoke_z_on(foo))
assert_raise(NoMethodError) { foo.z }
end
def test_new_method_by_send
foo = Foo.new
assert_raise(NoMethodError) { foo.send(:z) }
assert_equal("FooExt#z", FooExtClient.send_z_on(foo))
assert_raise(NoMethodError) { foo.send(:z) }
end
def test_new_method_by_method_object
foo = Foo.new
assert_raise(NoMethodError) { foo.send(:z) }
assert_equal("FooExt#z", FooExtClient.method_z(foo).call)
assert_raise(NoMethodError) { foo.send(:z) }
end
def test_no_local_rebinding
foo = Foo.new
assert_equal("Foo#x", foo.call_x)
assert_equal("Foo#x", FooExtClient.invoke_call_x_on(foo))
assert_equal("Foo#x", foo.call_x)
end
def test_subclass_is_prior
sub = FooSub.new
assert_equal("FooSub#x", sub.x)
assert_equal("FooSub#x", FooExtClient.invoke_x_on(sub))
assert_equal("FooSub#x", sub.x)
end
def test_super_in_subclass
sub = FooSub.new
assert_equal("FooSub#y Foo#y", sub.y)
# not "FooSub#y FooExt#y Foo#y"
assert_equal("FooSub#y Foo#y", FooExtClient.invoke_y_on(sub))
assert_equal("FooSub#y Foo#y", sub.y)
end
def test_new_method_on_subclass
sub = FooSub.new
assert_raise(NoMethodError) { sub.z }
assert_equal("FooExt#z", FooExtClient.invoke_z_on(sub))
assert_raise(NoMethodError) { sub.z }
end
def test_module_eval
foo = Foo.new
assert_equal("Foo#x", foo.x)
assert_equal("FooExt#x", FooExt.module_eval { foo.x })
assert_equal("Foo#x", foo.x)
end
def test_instance_eval
foo = Foo.new
ext_client = FooExtClient.new
assert_equal("Foo#x", foo.x)
assert_equal("FooExt#x", ext_client.instance_eval { foo.x })
assert_equal("Foo#x", foo.x)
end
def test_override_builtin_method
m = Module.new {
refine Fixnum do
def /(other) quo(other) end
end
}
assert_equal(0, 1 / 2)
assert_equal(Rational(1, 2), m.module_eval { 1 / 2 })
assert_equal(0, 1 / 2)
end
def test_override_builtin_method_with_method_added
m = Module.new {
refine Fixnum do
def self.method_added(*args); end
def +(other) "overriden" end
end
}
assert_equal(3, 1 + 2)
assert_equal("overriden", m.module_eval { 1 + 2 })
assert_equal(3, 1 + 2)
end
def test_return_value_of_refine
mod = nil
result = nil
m = Module.new {
result = refine(Object) {
mod = self
}
}
assert_equal mod, result
end
def test_refine_same_class_twice
result1 = nil
result2 = nil
result3 = nil
m = Module.new {
result1 = refine(Fixnum) {
def foo; return "foo" end
}
result2 = refine(Fixnum) {
def bar; return "bar" end
}
result3 = refine(String) {
def baz; return "baz" end
}
}
assert_equal("foo", m.module_eval { 1.foo })
assert_equal("bar", m.module_eval { 1.bar })
assert_equal(result1, result2)
assert_not_equal(result1, result3)
end
def test_respond_to?
m = Module.new {
refine Fixnum do
def foo; "foo"; end
end
}
assert_equal(false, 1.respond_to?(:foo))
assert_equal(true, m.module_eval { 1.respond_to?(:foo) })
assert_equal(false, 1.respond_to?(:foo))
end
def test_builtin_method_no_local_rebinding
m = Module.new {
refine String do
def <=>(other) return 0 end
end
}
assert_equal(false, m.module_eval { "1" >= "2" })
m2 = Module.new {
refine Array do
def each
super do |i|
yield 2 * i
end
end
end
}
a = [1, 2, 3]
assert_equal(1, m2.module_eval { a.min })
end
def test_module_inclusion
m1 = Module.new {
def foo
"m1#foo"
end
def bar
"m1#bar"
end
}
m2 = Module.new {
def bar
"m2#bar"
end
def baz
"m2#baz"
end
}
m3 = Module.new {
def baz
"m3#baz"
end
}
include_proc = Proc.new {
include m3, m2
}
m = Module.new {
refine String do
include m1
module_eval(&include_proc)
def call_foo
foo
end
def call_bar
bar
end
def call_baz
baz
end
end
def self.call_foo(s)
s.foo
end
def self.call_bar(s)
s.bar
end
def self.call_baz(s)
s.baz
end
}
assert_equal("m1#foo", m.module_eval { "abc".foo })
assert_equal("m2#bar", m.module_eval { "abc".bar })
assert_equal("m3#baz", m.module_eval { "abc".baz })
assert_equal("m1#foo", m.module_eval { "abc".call_foo })
assert_equal("m2#bar", m.module_eval { "abc".call_bar })
assert_equal("m3#baz", m.module_eval { "abc".call_baz })
assert_equal("m1#foo", m.call_foo("abc"))
assert_equal("m2#bar", m.call_bar("abc"))
assert_equal("m3#baz", m.call_baz("abc"))
end
def test_refine_prepended_class
m1 = Module.new {
def foo
super << :m1
end
}
c = Class.new {
prepend m1
def foo
[:c]
end
}
m2 = Module.new {
refine c do
def foo
super << :m2
end
end
}
obj = c.new
assert_equal([:c, :m1, :m2], m2.module_eval { obj.foo })
end
def test_refine_module_without_overriding
m1 = Module.new
c = Class.new {
include m1
}
m2 = Module.new {
refine m1 do
def foo
:m2
end
end
}
obj = c.new
assert_equal(:m2, m2.module_eval { obj.foo })
end
def test_refine_module_with_overriding
m1 = Module.new {
def foo
[:m1]
end
}
c = Class.new {
include m1
}
m2 = Module.new {
refine m1 do
def foo
super << :m2
end
end
}
obj = c.new
assert_equal([:m1, :m2], m2.module_eval { obj.foo })
end
def test_refine_module_with_double_overriding
m1 = Module.new {
def foo
[:m1]
end
}
c = Class.new {
include m1
}
m2 = Module.new {
refine m1 do
def foo
super << :m2
end
end
}
m3 = Module.new {
using m2
refine m1 do
def foo
super << :m3
end
end
}
obj = c.new
assert_equal([:m1, :m2, :m3], m3.module_eval { obj.foo })
end
def test_refine_module_and_call_superclass_method
m1 = Module.new
c1 = Class.new {
def foo
"c1#foo"
end
}
c2 = Class.new(c1) {
include m1
}
m2 = Module.new {
refine m1 do
end
}
obj = c2.new
assert_equal("c1#foo", m2.module_eval { obj.foo })
end
def test_refine_neither_class_nor_module
assert_raise(TypeError) do
Module.new {
refine Object.new do
end
}
end
assert_raise(TypeError) do
Module.new {
refine 123 do
end
}
end
assert_raise(TypeError) do
Module.new {
refine "foo" do
end
}
end
end
def test_refine_in_class_and_class_eval
c = Class.new {
refine Fixnum do
def foo
"c"
end
end
}
assert_equal("c", c.class_eval { 123.foo })
end
def test_main_using
assert_in_out_err([], <<-INPUT, %w(:C :M), [])
class C
def foo
:C
end
end
module M
refine C do
def foo
:M
end
end
end
c = C.new
p c.foo
using M
p c.foo
INPUT
end
def test_no_kernel_using
assert_raise(NoMethodError) do
using Module.new
end
end
def test_module_using_class
c = Class.new
m = Module.new
assert_raise(TypeError) do
m.module_eval do
using c
end
end
end
def test_refinements_empty
m = Module.new
assert(m.refinements.empty?)
end
def test_refinements_one
c = Class.new
c_ext = nil
m = Module.new {
refine c do
c_ext = self
end
}
assert_equal({c => c_ext}, m.refinements)
end
def test_refinements_two
c1 = Class.new
c1_ext = nil
c2 = Class.new
c2_ext = nil
m = Module.new {
refine c1 do
c1_ext = self
end
refine c2 do
c2_ext = self
end
}
assert_equal({c1 => c1_ext, c2 => c2_ext}, m.refinements)
end
def test_refinements_duplicate_refine
c = Class.new
c_ext = nil
m = Module.new {
refine c do
c_ext = self
end
refine c do
end
}
assert_equal({c => c_ext}, m.refinements)
end
def test_refinements_no_recursion
c1 = Class.new
c1_ext = nil
m1 = Module.new {
refine c1 do
c1_ext = self
end
}
c2 = Class.new
c2_ext = nil
m2 = Module.new {
using m1
refine c2 do
c2_ext = self
end
}
assert_equal({c2 => c2_ext}, m2.refinements)
end
def test_refine_without_block
c1 = Class.new
e = assert_raise(ArgumentError) {
Module.new do
refine c1
end
}
assert_equal("no block given", e.message)
end
module IndirectUsing
class C
end
module M1
refine C do
def m1
:m1
end
end
end
module M2
refine C do
def m2
:m2
end
end
end
module M3
using M1
using M2
end
module M
using M3
def self.call_m1
C.new.m1
end
def self.call_m2
C.new.m2
end
end
end
def test_indirect_using
assert_equal(:m1, IndirectUsing::M.call_m1)
assert_equal(:m2, IndirectUsing::M.call_m2)
end
def test_indirect_using_module_eval
c = Class.new
m1 = Module.new {
refine c do
def m1
:m1
end
end
}
m2 = Module.new {
refine c do
def m2
:m2
end
end
}
m3 = Module.new {
using m1
using m2
}
m = Module.new {
using m3
}
assert_equal(:m1, m.module_eval { c.new.m1 })
assert_equal(:m2, m.module_eval { c.new.m2 })
end
module SymbolToProc
class C
end
module M
refine C do
def foo
"foo"
end
end
def self.call_foo
c = C.new
:foo.to_proc.call(c)
end
def self.foo_proc
:foo.to_proc
end
end
end
def test_symbol_to_proc
assert_equal("foo", SymbolToProc::M.call_foo)
assert_equal("foo", SymbolToProc::M.foo_proc.call(SymbolToProc::C.new))
end
module Inspect
module M
refine Fixnum do
end
end
end
def test_inspect
assert_equal("#<refinement:Fixnum@TestRefinement::Inspect::M>",
Inspect::M.refinements[Fixnum].inspect)
c = Class.new
m = Module.new {
refine String do
end
refine c do
end
}
assert_equal("#<refinement:String@#{m.inspect}>",
m.refinements[String].inspect)
assert_equal("#<refinement:#{c.inspect}@#{m.inspect}>",
m.refinements[c].inspect)
end
module InlineMethodCache
class C
def foo
"original"
end
end
module M
refine C do
def foo
"refined"
end
end
end
end
def test_inline_method_cache
skip "can't implement efficiently with the current implementation of refinements"
c = InlineMethodCache::C.new
f = Proc.new { c.foo }
assert_equal("original", f.call)
assert_equal("refined", InlineMethodCache::M.module_eval(&f))
assert_equal("original", f.call)
end
module UsingMethodCache
class C
def foo
"original"
end
end
module M1
refine C do
def foo
"M1"
end
end
end
module M2
refine C do
def foo
"M2"
end
end
end
module M
c = C.new
ORIGINAL_FOO = c.foo
using M1
c.foo
using M2
M2_FOO = c.foo
end
end
def test_using_method_cache
assert_equal("original", UsingMethodCache::M::ORIGINAL_FOO)
assert_equal("M2", UsingMethodCache::M::M2_FOO)
assert_in_out_err([], <<-INPUT, %w(:M1 :M2), [])
class C
def foo
"original"
end
end
module M1
refine C do
def foo
:M1
end
end
end
module M2
refine C do
def foo
:M2
end
end
end
c = C.new
using M1
p c.foo
using M2
p c.foo
INPUT
end
end
|