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require_relative '../../spec_helper'
require_relative 'fixtures/caller_locations'
describe 'Kernel#caller_locations' do
it 'is a private method' do
Kernel.should have_private_instance_method(:caller_locations)
end
it 'returns an Array of caller locations' do
KernelSpecs::CallerLocationsTest.locations.should_not.empty?
end
it 'returns an Array of caller locations using a custom offset' do
locations = KernelSpecs::CallerLocationsTest.locations(2)
locations[0].absolute_path.should.end_with?('mspec.rb')
end
it 'returns an Array of caller locations using a custom limit' do
locations = KernelSpecs::CallerLocationsTest.locations(1, 1)
locations.length.should == 1
end
it "can be called with a range" do
locations1 = caller_locations(0)
locations2 = caller_locations(2..4)
locations1[2..4].map(&:to_s).should == locations2.map(&:to_s)
end
it "works with endless ranges" do
locations1 = caller_locations(0)
locations2 = caller_locations(eval("(2..)"))
locations2.map(&:to_s).should == locations1[2..-1].map(&:to_s)
end
it "works with beginless ranges" do
locations1 = caller_locations(0)
locations2 = caller_locations((...5))
locations2.map(&:to_s)[eval("(2..)")].should == locations1[(...5)].map(&:to_s)[eval("(2..)")]
end
it "can be called with a range whose end is negative" do
locations1 = caller_locations(0)
locations2 = caller_locations(2..-1)
locations3 = caller_locations(2..-2)
locations1[2..-1].map(&:to_s).should == locations2.map(&:to_s)
locations1[2..-2].map(&:to_s).should == locations3.map(&:to_s)
end
it "must return nil if omitting more locations than available" do
caller_locations(100).should == nil
caller_locations(100..-1).should == nil
end
it "must return [] if omitting exactly the number of locations available" do
omit = caller_locations(0).length
caller_locations(omit).should == []
end
it 'returns the locations as Thread::Backtrace::Location instances' do
locations = KernelSpecs::CallerLocationsTest.locations
locations.each do |location|
location.kind_of?(Thread::Backtrace::Location).should == true
end
end
it "must return the same locations when called with 1..-1 and when called with no arguments" do
caller_locations.map(&:to_s).should == caller_locations(1..-1).map(&:to_s)
end
guard -> { Kernel.instance_method(:tap).source_location } do
it "includes core library methods defined in Ruby" do
file, line = Kernel.instance_method(:tap).source_location
file.should.start_with?('<internal:')
loc = nil
tap { loc = caller_locations(1, 1)[0] }
loc.label.should == "tap"
loc.path.should.start_with? "<internal:"
end
end
end
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