diff options
Diffstat (limited to 'spec/ruby/core/thread/backtrace_spec.rb')
-rw-r--r-- | spec/ruby/core/thread/backtrace_spec.rb | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/spec/ruby/core/thread/backtrace_spec.rb b/spec/ruby/core/thread/backtrace_spec.rb index 84ed574d5c..9001b1b7eb 100644 --- a/spec/ruby/core/thread/backtrace_spec.rb +++ b/spec/ruby/core/thread/backtrace_spec.rb @@ -32,4 +32,38 @@ describe "Thread#backtrace" do t.join backtrace.should be_kind_of(Array) end + + it "can be called with a number of locations to omit" do + locations1 = Thread.current.backtrace + locations2 = Thread.current.backtrace(2) + locations1[2..-1].length.should == locations2.length + locations1[2..-1].map(&:to_s).should == locations2.map(&:to_s) + end + + it "can be called with a maximum number of locations to return as second parameter" do + locations1 = Thread.current.backtrace + locations2 = Thread.current.backtrace(2, 3) + locations1[2..4].map(&:to_s).should == locations2.map(&:to_s) + end + + it "can be called with a range" do + locations1 = Thread.current.backtrace + locations2 = Thread.current.backtrace(2..4) + locations1[2..4].map(&:to_s).should == locations2.map(&:to_s) + end + + it "can be called with a range whose end is negative" do + Thread.current.backtrace(2..-1).should == Thread.current.backtrace[2..-1] + Thread.current.backtrace(2..-2).should == Thread.current.backtrace[2..-2] + end + + it "returns nil if omitting more locations than available" do + Thread.current.backtrace(100).should == nil + Thread.current.backtrace(100..-1).should == nil + end + + it "returns [] if omitting exactly the number of locations available" do + omit = Thread.current.backtrace.length + Thread.current.backtrace(omit).should == [] + end end |