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mshalaby/object_mock_test.rb

Created February 24, 2010 09:00
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Tests for object_mock.rb mocking solution
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object_mock_test.rb
require "object_mock"
require "rubygems"
require "shoulda"
class ObjectMockTest < Test::Unit::TestCase
context "With class X" do
setup do
class X
def m; "m"; end;
def self.c; "c"; end;
end
@x = X.new
@orig_m = @x.m
@x2 = X.new
@orig_m2 = @x2.m
@orig_c = X.c
end
context "mocking an instance method for an object within a block" do
context "within a block" do
setup do
@x.mock(:m => lambda { "mocked" }) do
@mocked_m = @x.m
@non_mocked = @x2.m
end
end
should("mock the method within the block") do
assert_equal "mocked", @mocked_m
assert_equal @orig_m, @x.m
end
should("not affect other instances within the block") { assert_equal @orig_m, @non_mocked }
end
context "with mock and unmock methods" do
setup do
@x.mock(:m => "mocked")
@mocked_m = @x.m
@non_mocked = @x2.m
@x.unmock(:m)
end
should("mock the method") do
assert_equal "mocked", @mocked_m
assert_equal @orig_m, @x.m
end
should("not affect other instances") { assert_equal @orig_m, @non_mocked }
end
end
context "changing the instance method definition while being mocked for an object within a block" do
setup do
@x.mock(:m => "mocked") do
X.class_eval { def m; "changed"; end }
@mocked_m = @x.m
@non_mocked = @x2.m
end
end
should("mock the method within the block") { assert_equal "mocked", @mocked_m }
should("not affect other instances within the block") { assert_equal "changed", @non_mocked }
should("respond with the current implementation after the block") { assert "changed", @x.m }
end
context "adding an instance method for an object within a block" do
setup do
@x.mock(:m2 => "new method") do
@added = @x.m2
@non_mocked = @x2.respond_to? :m2
end
end
should("add the new method within the block scope") do
assert_equal "new method", @added
assert !@x.respond_to?(:added)
end
should("not affect other instances within the block") { assert !@non_mocked }
end
context "mocking a class method within a block" do
setup do
X.mock(:c => "mocked") do
@mocked_c = X.c
end
end
should("mock the method within the block") do
assert_equal "mocked", @mocked_c
assert_equal @orig_c, X.c
end
end
context "mocking with nested blocks" do
setup do
@x.mock(:m => "mocked") do
@before_inner = @x.m
@x.mock(:m => "inner_mock") do
@inner_mock = @x.m
end
@after_inner = @x.m
end
end
should("mock the method within the outer block") do
assert_equal "mocked", @before_inner
assert_equal @orig_m, @x.m
end
should("mock the method within the inner block") do
assert_equal "inner_mock", @inner_mock
assert_equal @before_inner, @after_inner
end
end
context "mocking an instance method at class level within a block" do
context "within a block" do
setup do
@x.class_mock(:m => "mocked") do
@mocked = @x.m
@mocked2 = @x2.m
end
end
should("mock the method within the block") do
assert_equal "mocked", @mocked
assert_equal "mocked", @mocked2
assert_equal @orig_m, @x.m
assert_equal @orig_m2, @x2.m
end
end
context "with mock and unmock methods" do
setup do
@x.class_mock(:m => "mocked")
@mocked = @x.m
@mocked2 = @x2.m
@x.class_unmock(:m)
end
should("mock the method") do
assert_equal "mocked", @mocked
assert_equal "mocked", @mocked2
assert_equal @orig_m, @x.m
assert_equal @orig_m2, @x2.m
end
end
end
end
end
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