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