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#!/usr/bin/env ruby
require 'test_helper'
class TestDemeterMocking < Minitest::Test
include FlexMock::Minitest
def test_demeter_mocking_basics
m = flexmock("A")
m.should_receive("children.first").and_return(:first)
assert_kind_of FlexMock, m
assert_kind_of FlexMock, m.children
assert_equal :first, m.children.first
end
def test_demeter_mocking_with_operators
m = flexmock("A")
m.should_receive("children.+@.last").and_return(:value)
assert_kind_of FlexMock, m
assert_kind_of FlexMock, m.children
assert_kind_of FlexMock, + m.children
assert_equal :value, (+ m.children).last
end
def test_demeter_mocking_with_multiple_operators
m = flexmock("A")
m.should_receive("+@.-@.~").and_return(:value)
assert_equal :value, ~-+m
end
def test_multiple_demeter_mocks_on_same_branch_is_ok
m = flexmock("A")
m.should_receive("child.x.y.z.first").and_return(:first)
m.should_receive("child.x.y.z.last").and_return(:last)
assert_equal :first, m.child.x.y.z.first
assert_equal :last, m.child.x.y.z.last
end
def test_multi_level_deep_demeter_violation_with_mock
a = flexmock("a")
a.should_receive("b.c.d.e.f.g.h.i.j.k").and_return(:xyzzy)
assert_equal :xyzzy, a.b.c.d.e.f.g.h.i.j.k
end
def test_partial_with_demeter
a = flexmock(Object.new, "a partial")
a.should_receive("b.c").and_return(:xyzzy)
assert_equal :xyzzy, a.b.c
end
def test_multi_level_deep_demeter_violation_with_partial
a = flexmock(Object.new, "a")
a.should_receive("b.c.d.e.f.g.h.i.j.k").and_return(:xyzzy)
assert_equal :xyzzy, a.b.c.d.e.f.g.h.i.j.k
end
def test_final_method_can_have_multiple_expecations
a = flexmock("a")
a.should_receive("b.c.d.last").with(1).and_return(:one).once
a.should_receive("b.c.d.last").with(2).and_return(:two).once
assert_equal :one, a.b.c.d.last(1)
assert_equal :two, a.b.c.d.last(2)
end
def test_conflicting_mock_declarations_raises_an_error
m = flexmock("A")
ex = assert_raises(FlexMock::UsageError) do
m.should_receive("child").and_return(:xyzzy)
m.should_receive("child.other").and_return(:other)
m.child.other
end
assert_match(/conflicting/i, ex.message)
assert_match(/mock\s+declaration/i, ex.message)
assert_match(/child/i, ex.message)
end
def test_compatible_mock_declarations_are_ok_full_mock_version
m = flexmock("A")
b = flexmock("B")
c = flexmock("C")
m.should_receive(:b => b)
b.should_receive(:c => c)
c.should_receive(:foo => :bar)
m.should_receive("b.c.baz").and_return(:barg)
m.should_receive("b.zhar").and_return(:zzz)
assert_equal :bar, m.b.c.foo
assert_equal :barg, m.b.c.baz
assert_equal :zzz, m.b.zhar
end
def test_compatible_mock_declarations_are_ok_partial_mock_version
m = flexmock("A")
b = flexmock(Object.new, "B")
c = flexmock("C")
m.should_receive(:b => b)
b.should_receive(:c => c)
c.should_receive(:foo => :bar)
m.should_receive("b.c.baz").and_return(:barg)
m.should_receive("b.zhar").and_return(:zzz)
assert_equal :bar, m.b.c.foo
assert_equal :barg, m.b.c.baz
assert_equal :zzz, m.b.zhar
end
def test_paths
m = flexmock("A")
b = flexmock("B")
m.should_receive("a.b" => b)
m.should_receive("a.b.c.x" => 1)
m.should_receive("a.b.c.y" => 2)
end
def test_conflicting_mock_declarations_in_reverse_order_does_not_raise_error
# Not all conflicting definitions can be detected.
m = flexmock("A")
assert_failure(assertion_failed_error) do
m.should_receive("child.other").and_return(:other)
m.should_receive("child").and_return(:xyzzy)
assert_equal :xyzzy, m.child.other
end
end
def test_preestablishing_existing_mock_is_ok
engine = flexmock("engine")
car = flexmock("A")
car.should_receive(:engine).and_return(engine)
car.should_receive("engine.cylinder").and_return(:cyl)
assert_equal :cyl, car.engine.cylinder
end
def test_quick_defs_can_use_demeter_mocking
a = flexmock("a")
a.should_receive("b.c.d.x").and_return(:x)
a.should_receive("b.c.d.y").and_return(:y)
a.should_receive("b.c.d.z").and_return(:z)
assert_equal :x, a.b.c.d.x
assert_equal :y, a.b.c.d.y
assert_equal :z, a.b.c.d.z
end
def test_quick_defs_can_use_demeter_mocking_two
a = flexmock("a", "b.c.d.xx" => :x, "b.c.d.yy" => :y, "b.c.d.zz" => :z)
assert_equal :x, a.b.c.d.xx
assert_equal :y, a.b.c.d.yy
assert_equal :z, a.b.c.d.zz
end
def test_errors_on_ill_formed_method_names
m = flexmock("a")
[
'a(2)', '0a', 'a-b', 'a b', ' ', 'a ', ' b', 'a!b', "a?b", 'a=b'
].each do |method|
assert_raises FlexMock::UsageError do m.should_receive(method) end
end
end
def test_no_errors_on_well_formed_method_names
m = flexmock("a")
[
'a', 'a?', 'a!', 'a=', 'z0', 'save!'
].each do |method|
m.should_receive(method)
end
end
def test_readme_example_1
cog = flexmock("cog")
cog.should_receive(:turn).once.and_return(:ok).mock
joint = flexmock("gear", :cog => cog)
axle = flexmock("axle", :universal_joint => joint)
chassis = flexmock("chassis", :axle => axle)
car = flexmock("car", :chassis => chassis)
assert_equal :ok, car.chassis.axle.universal_joint.cog.turn
end
def test_readme_example_2
car = flexmock("car")
car.should_receive("chassis.axle.universal_joint.cog.turn" => :ok).once
assert_equal :ok, car.chassis.axle.universal_joint.cog.turn
end
def test_readme_example_3
car = flexmock("car")
car.should_receive("chassis.axle.universal_joint.cog.turn").once.
and_return(:ok)
assert_equal :ok, car.chassis.axle.universal_joint.cog.turn
end
end
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