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require 'spec_helper'
describe Parslet::Source::RangeSearch do
describe "<- #lbound" do
context "for a simple array" do
let(:ary) { [10, 20, 30, 40, 50] }
before(:each) { ary.extend Parslet::Source::RangeSearch }
it "should return correct answers for numbers not in the array" do
ary.lbound(5).should == 0
ary.lbound(15).should == 1
ary.lbound(25).should == 2
ary.lbound(35).should == 3
ary.lbound(45).should == 4
end
it "should return correct answers for numbers in the array" do
ary.lbound(10).should == 1
ary.lbound(20).should == 2
ary.lbound(30).should == 3
ary.lbound(40).should == 4
end
it "should cover right edge case" do
ary.lbound(50).should be_nil
ary.lbound(51).should be_nil
end
it "should cover left edge case" do
ary.lbound(0).should == 0
end
end
context "for an empty array" do
let(:ary) { [] }
before(:each) { ary.extend Parslet::Source::RangeSearch }
it "should return nil" do
ary.lbound(1).should be_nil
end
end
end
end
describe Parslet::Source::LineCache do
describe "<- scan_for_line_endings" do
context "calculating the line_and_columns" do
let(:str) { "foo\nbar\nbazd" }
it "should return the first line if we have no line ends" do
subject.scan_for_line_endings(0, nil)
subject.line_and_column(3).should == [1, 4]
subject.scan_for_line_endings(0, "")
subject.line_and_column(5).should == [1, 6]
end
it "should find the right line starting from pos 0" do
subject.scan_for_line_endings(0, str)
subject.line_and_column(5).should == [2, 2]
subject.line_and_column(9).should == [3, 2]
end
it "should find the right line starting from pos 5" do
subject.scan_for_line_endings(5, str)
subject.line_and_column(11).should == [2, 3]
end
it "should find the right line if scannning the string multiple times" do
subject.scan_for_line_endings(0, str)
subject.scan_for_line_endings(0, "#{str}\nthe quick\nbrown fox")
subject.line_and_column(10).should == [3,3]
subject.line_and_column(24).should == [5,2]
end
end
end
end
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