require 'spec_helper'
require 'ronin/sql/field'

describe SQL::Field do
  describe "#initialize" do
    it "should convert name to a String" do
      described_class.new(:table).name.should == 'table'
    end

    it "should default parent to nil" do
      described_class.new('table').parent.should be_nil
    end
  end

  describe "parse" do
    context "when passed a single field" do
      let(:name) { "column" }

      subject { described_class.parse(name) }

      it "should parse the field name" do
        subject.name.should == name
      end

      it "should not have a parent" do
        subject.parent.should be_nil
      end
    end

    context "when parsing multiple fields" do
      let(:parent) { "table"  }
      let(:name)   { "column" }

      subject { described_class.parse("#{parent}.#{name}") }

      it "should parse the field name" do
        subject.name.should == name
      end

      it "should parse the parent field" do
        subject.parent.name.should == parent
      end
    end
  end

  describe "#to_s" do
    context "when parent is nil" do
      let(:name) { "column" }

      subject { described_class.new(name) }

      it "should return the name" do
        subject.to_s.should == name
      end
    end

    context "when parent is set" do
      let(:parent) { "table"  }
      let(:name)   { "column" }

      subject { described_class.new(name,described_class.new(parent)) }

      it "should return the name" do
        subject.to_s.should == "#{parent}.#{name}"
      end
    end
  end

  describe "#method_missing" do
    context "at depth 1" do
      subject { described_class.new('table') }

      it "should allow accessing sub-fields" do
        subject.column.name.should == 'column'
      end
    end

    context "at depth 2" do
      subject { described_class.new('table',described_class.new('db')) }

      it "should allow accessing sub-fields" do
        subject.column.name.should == 'column'
      end
    end

    context "at depth 3" do
      subject do
        described_class.new(
          'column',
          described_class.new(
            'table', described_class.new('db')
          )
        )
      end

      it "should not allow accessing sub-fields" do
        lambda {
          subject.column
        }.should raise_error(NoMethodError)
      end
    end
  end
end