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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe :kernel_String, shared: true do
it "converts nil to a String" do
@object.send(@method, nil).should == ""
end
it "converts a Float to a String" do
@object.send(@method, 1.12).should == "1.12"
end
it "converts a boolean to a String" do
@object.send(@method, false).should == "false"
@object.send(@method, true).should == "true"
end
it "converts a constant to a String" do
@object.send(@method, Object).should == "Object"
end
it "calls #to_s to convert an arbitrary object to a String" do
obj = mock('test')
obj.should_receive(:to_s).and_return("test")
@object.send(@method, obj).should == "test"
end
it "raises a TypeError if #to_s does not exist" do
obj = mock('to_s')
class << obj
undef_method :to_s
end
-> { @object.send(@method, obj) }.should raise_error(TypeError)
end
# #5158
it "raises a TypeError if respond_to? returns false for #to_s" do
obj = mock("to_s")
class << obj
def respond_to?(meth, include_private=false)
meth == :to_s ? false : super
end
end
-> { @object.send(@method, obj) }.should raise_error(TypeError)
end
it "raises a TypeError if #to_s is not defined, even though #respond_to?(:to_s) returns true" do
# cannot use a mock because of how RSpec affects #method_missing
obj = Object.new
class << obj
undef_method :to_s
def respond_to?(meth, include_private=false)
meth == :to_s ? true : super
end
end
-> { @object.send(@method, obj) }.should raise_error(TypeError)
end
it "calls #to_s if #respond_to?(:to_s) returns true" do
obj = mock('to_s')
class << obj
undef_method :to_s
def method_missing(meth, *args)
meth == :to_s ? "test" : super
end
end
@object.send(@method, obj).should == "test"
end
it "raises a TypeError if #to_s does not return a String" do
(obj = mock('123')).should_receive(:to_s).and_return(123)
-> { @object.send(@method, obj) }.should raise_error(TypeError)
end
it "returns the same object if it is already a String" do
string = "Hello"
string.should_not_receive(:to_s)
string2 = @object.send(@method, string)
string.should equal(string2)
end
it "returns the same object if it is an instance of a String subclass" do
subklass = Class.new(String)
string = subklass.new("Hello")
string.should_not_receive(:to_s)
string2 = @object.send(@method, string)
string.should equal(string2)
end
end
describe "Kernel.String" do
it_behaves_like :kernel_String, :String, Kernel
end
describe "Kernel#String" do
it_behaves_like :kernel_String, :String, Object.new
it "is a private method" do
Kernel.should have_private_instance_method(:String)
end
end
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