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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Kernel#inspect" do
it "returns a String" do
Object.new.inspect.should be_an_instance_of(String)
end
it "does not call #to_s if it is defined" do
# We must use a bare Object here
obj = Object.new
inspected = obj.inspect
obj.stub!(:to_s).and_return("to_s'd")
obj.inspect.should == inspected
end
it "returns a String with the object class and object_id encoded" do
obj = Object.new
obj.inspect.should =~ /^#<Object:0x[0-9a-f]+>$/
end
it "returns a String for an object without #class method" do
obj = Object.new
class << obj
undef_method :class
end
obj.inspect.should be_kind_of(String)
end
ruby_version_is "4.0" do
it "calls #instance_variables_to_inspect private method to know which variables to display" do
obj = Object.new
obj.instance_eval do
@host = "localhost"
@user = "root"
@password = "hunter2"
end
obj.singleton_class.class_eval do
private def instance_variables_to_inspect = %i[@host @user @does_not_exist]
end
inspected = obj.inspect.sub(/^#<Object:0x[0-9a-f]+/, '#<Object:0x00')
inspected.should == '#<Object:0x00 @host="localhost", @user="root">'
obj = Object.new
obj.instance_eval do
@host = "localhost"
@user = "root"
@password = "hunter2"
end
obj.singleton_class.class_eval do
private def instance_variables_to_inspect = []
end
inspected = obj.inspect.sub(/^#<Object:0x[0-9a-f]+/, '#<Object:0x00')
inspected.should == "#<Object:0x00>"
end
it "displays all instance variables if #instance_variables_to_inspect returns nil" do
obj = Object.new
obj.instance_eval do
@host = "localhost"
@user = "root"
@password = "hunter2"
end
obj.singleton_class.class_eval do
private def instance_variables_to_inspect = nil
end
inspected = obj.inspect.sub(/^#<Object:0x[0-9a-f]+/, '#<Object:0x00')
inspected.should == %{#<Object:0x00 @host="localhost", @user="root", @password="hunter2">}
end
it "raises an error if #instance_variables_to_inspect returns an invalid value" do
obj = Object.new
obj.instance_eval do
@host = "localhost"
@user = "root"
@password = "hunter2"
end
obj.singleton_class.class_eval do
private def instance_variables_to_inspect = {}
end
->{ obj.inspect }.should raise_error(TypeError, "Expected #instance_variables_to_inspect to return an Array or nil, but it returned Hash")
end
end
end
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