ruby--ruby/spec/ruby/core/symbol/match_spec.rb

require_relative '../../spec_helper'

describe :symbol_match, shared: true do
  it "returns the index of the beginning of the match" do
    :abc.send(@method, /b/).should == 1
  end

  it "returns nil if there is no match" do
    :a.send(@method, /b/).should be_nil
  end

  it "sets the last match pseudo-variables" do
    :a.send(@method, /(.)/).should == 0
    $1.should == "a"
  end
end

describe "Symbol#=~" do
  it_behaves_like :symbol_match, :=~
end

describe "Symbol#match" do
  it "returns the MatchData" do
    result = :abc.match(/b/)
    result.should be_kind_of(MatchData)
    result[0].should == 'b'
  end

  it "returns nil if there is no match" do
    :a.match(/b/).should be_nil
  end

  it "sets the last match pseudo-variables" do
    :a.match(/(.)/)[0].should == 'a'
    $1.should == "a"
  end

  describe "when passed a block" do
    it "yields the MatchData" do
      :abc.match(/./) {|m| ScratchPad.record m }
      ScratchPad.recorded.should be_kind_of(MatchData)
    end

    it "returns the block result" do
      :abc.match(/./) { :result }.should == :result
    end

    it "does not yield if there is no match" do
      ScratchPad.record []
      :b.match(/a/) {|m| ScratchPad << m }
      ScratchPad.recorded.should == []
    end
  end
end

describe "Symbol#match?" do
  before :each do
    # Resetting Regexp.last_match
    /DONTMATCH/.match ''
  end

  context "when matches the given regex" do
    it "returns true but does not set Regexp.last_match" do
      :string.match?(/string/i).should be_true
      Regexp.last_match.should be_nil
    end
  end

  it "returns false when does not match the given regex" do
    :string.match?(/STRING/).should be_false
  end

  it "takes matching position as the 2nd argument" do
    :string.match?(/str/i, 0).should be_true
    :string.match?(/str/i, 1).should be_false
  end
end