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Diffstat (limited to 'spec/ruby/core/string/plus_spec.rb')
-rw-r--r-- | spec/ruby/core/string/plus_spec.rb | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/spec/ruby/core/string/plus_spec.rb b/spec/ruby/core/string/plus_spec.rb new file mode 100644 index 0000000000..addc8873eb --- /dev/null +++ b/spec/ruby/core/string/plus_spec.rb @@ -0,0 +1,47 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/concat', __FILE__) + +describe "String#+" do + it "returns a new string containing the given string concatenated to self" do + ("" + "").should == "" + ("" + "Hello").should == "Hello" + ("Hello" + "").should == "Hello" + ("Ruby !" + "= Rubinius").should == "Ruby != Rubinius" + end + + it "converts any non-String argument with #to_str" do + c = mock 'str' + c.should_receive(:to_str).any_number_of_times.and_return(' + 1 = 2') + + ("1" + c).should == '1 + 1 = 2' + end + + it "raises a TypeError when given any object that fails #to_str" do + lambda { "" + Object.new }.should raise_error(TypeError) + lambda { "" + 65 }.should raise_error(TypeError) + end + + it "doesn't return subclass instances" do + (StringSpecs::MyString.new("hello") + "").should be_an_instance_of(String) + (StringSpecs::MyString.new("hello") + "foo").should be_an_instance_of(String) + (StringSpecs::MyString.new("hello") + StringSpecs::MyString.new("foo")).should be_an_instance_of(String) + (StringSpecs::MyString.new("hello") + StringSpecs::MyString.new("")).should be_an_instance_of(String) + (StringSpecs::MyString.new("") + StringSpecs::MyString.new("")).should be_an_instance_of(String) + ("hello" + StringSpecs::MyString.new("foo")).should be_an_instance_of(String) + ("hello" + StringSpecs::MyString.new("")).should be_an_instance_of(String) + end + + it "taints the result when self or other is tainted" do + strs = ["", "OK", StringSpecs::MyString.new(""), StringSpecs::MyString.new("OK")] + strs += strs.map { |s| s.dup.taint } + + strs.each do |str| + strs.each do |other| + (str + other).tainted?.should == (str.tainted? | other.tainted?) + end + end + end + + it_behaves_like :string_concat_encoding, :+ +end |