require "./spec_helper"

require "../src/timecost/range"

describe TimeCost::Range do

  epsilon = 0.5
  overlap_time = (epsilon / 2).hours
  separate_time = (epsilon * 2).hours

  author = TimeCost::Author.new(
    name: "Jon Snow",
    email: "jon.snow@example.com"
  )
	commit_base =  TimeCost::Commit.new(
    commit_hash: Random::Secure.base64(40),
    author: author,
    datetime: Time.utc,
  )
	commit_overlap_before =  TimeCost::Commit.new(
    commit_hash: Random::Secure.base64(40),
    author: author,
    datetime: Time.utc - overlap_time,
  )
	commit_overlap_after =  TimeCost::Commit.new(
    commit_hash: Random::Secure.base64(40),
    author: author,
    datetime: Time.utc + overlap_time,
  )

	commit_separate_before =  TimeCost::Commit.new(
    commit_hash: Random::Secure.base64(40),
    author: author,
    datetime: Time.utc - separate_time,
  )
	commit_separate_after =  TimeCost::Commit.new(
    commit_hash: Random::Secure.base64(40),
    author: author,
    datetime: Time.utc + separate_time,
  )


	describe ".new" do
		it "can be created without epsilon" do
	    range_base = TimeCost::Range.new(
        commit: commit_base
      )
      range_base.should be_a(TimeCost::Range)
		end

		it "can be created with epsilon" do
	    range_base = TimeCost::Range.new(
        commit: commit_base, 
        epsilon: epsilon
      )
      range_base.should be_a(TimeCost::Range)
		end
	end

	describe ".overlap?" do
		it "must return true when range overlaps range before" do
	    range_base = TimeCost::Range.new(
        commit: commit_base
      )
      range_before = TimeCost::Range.new(
        commit: commit_overlap_before
      )
      overlap1 = range_base.overlap? range_before
      overlap1.should be_true

      overlap2 = range_before.overlap? range_base
      overlap2.should be_true
		end

		it "must return true when range overlaps range after" do
	    range_base = TimeCost::Range.new(
        commit: commit_base
      )
      range_after = TimeCost::Range.new(
        commit: commit_overlap_after
      )
      overlap1 = range_base.overlap? range_after
      overlap1.should be_true

      overlap2 = range_after.overlap? range_base
      overlap2.should be_true
		end

		it "must return false when range does not overlap range before" do
	    range_base = TimeCost::Range.new(
        commit: commit_base
      )
      range_before = TimeCost::Range.new(
        commit: commit_separate_before
      )
      overlap1 = range_base.overlap? range_before
      overlap1.should be_false

      overlap2 = range_before.overlap? range_base
      overlap2.should be_false
		end

		it "must return false when range does not overlap range after" do
	    range_base = TimeCost::Range.new(
        commit: commit_base
      )
      range_after = TimeCost::Range.new(
        commit: commit_separate_after
      )
      overlap1 = range_base.overlap? range_after
      overlap1.should be_false

      overlap2 = range_after.overlap? range_base
      overlap2.should be_false
		end
	end
end