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Diffstat (limited to 'spec/ruby/core/array/join_spec.rb')
-rw-r--r-- | spec/ruby/core/array/join_spec.rb | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/spec/ruby/core/array/join_spec.rb b/spec/ruby/core/array/join_spec.rb new file mode 100644 index 0000000000..c4c6277c87 --- /dev/null +++ b/spec/ruby/core/array/join_spec.rb @@ -0,0 +1,48 @@ +require File.expand_path('../../../spec_helper', __FILE__) +require File.expand_path('../fixtures/classes', __FILE__) +require File.expand_path('../shared/join', __FILE__) + +describe "Array#join" do + it_behaves_like :array_join_with_string_separator, :join + it_behaves_like :array_join_with_default_separator, :join + + it "does not separate elements when the passed separator is nil" do + [1, 2, 3].join(nil).should == '123' + end + + it "calls #to_str to convert the separator to a String" do + sep = mock("separator") + sep.should_receive(:to_str).and_return(", ") + [1, 2].join(sep).should == "1, 2" + end + + it "does not call #to_str on the separator if the array is empty" do + sep = mock("separator") + sep.should_not_receive(:to_str) + [].join(sep).should == "" + end + + it "raises a TypeError if the separator cannot be coerced to a String by calling #to_str" do + obj = mock("not a string") + lambda { [1, 2].join(obj) }.should raise_error(TypeError) + end + + it "raises a TypeError if passed false as the separator" do + lambda { [1, 2].join(false) }.should raise_error(TypeError) + end +end + +describe "Array#join with $," do + before :each do + @before_separator = $, + end + + after :each do + $, = @before_separator + end + + it "separates elements with default separator when the passed separator is nil" do + $, = "_" + [1, 2, 3].join(nil).should == '1_2_3' + end +end |