require 'bundler/setup'
require 'rspec'
require_relative '../lib/papers'

describe 'NpmPackageSpecification' do
  describe '#full_introspected_entries' do
    it 'reads dependencies from the specified file' do
      Papers::Configuration.any_instance.stub(:npm_package_json_path).and_return('spec/support/package.json')

      expect(Papers::NpmPackage.full_introspected_entries).to eq([
        {"name"=>"prod_dependency", "version"=>"3.2.0"},
        {"name"=>"dev_dependency", "version"=>"1.2.3"}
      ])
    end

    it "returns an empty list if package.json is not found" do
      expect(Papers::NpmPackage.full_introspected_entries).to eq([])
    end

    it "raises an error when package.json does not parse properly" do
      Papers::Configuration.any_instance.stub(:npm_package_json_path).and_return('spec/support/package_with_error.json')
      expect { Papers::NpmPackage.full_introspected_entries }.to raise_error JSON::ParserError
    end

    it 'combines dependencies and devDependencies' do
      Papers::NpmPackage.stub(:package)
                    .and_return({'dependencies' => {'prod_package' => '~> 1.2.3'},
                                 'devDependencies' => {'dev_package' => '~> 1.2.0'}})


      expect(Papers::NpmPackage.full_introspected_entries).to eq([
        { 'name' => 'prod_package', 'version' => '1.2.3' },
        { 'name' => 'dev_package', 'version' => '1.2.0' }
      ])
    end

    it 'returns dependencies when devDependencies is not defined' do
      Papers::NpmPackage.stub(:package)
                    .and_return({'dependencies' => {'npm_package' => '1.2.3'}})

      expect(Papers::NpmPackage.full_introspected_entries).to eq([{
        'name' => 'npm_package',
        'version' => '1.2.3'
      }])
    end

    it 'returns devDependencies when dependencies is not defined' do
      Papers::NpmPackage.stub(:package)
                    .and_return({'devDependencies' => {'npm_package' => '1.2.3'}})

      expect(Papers::NpmPackage.full_introspected_entries).to eq([{
        'name' => 'npm_package',
        'version' => '1.2.3'
      }])
    end

    it 'removes leading non-digits from the version' do
      Papers::NpmPackage.stub(:package)
                    .and_return({'dependencies' => {'npm_package' => '~> 1.2.3'}})

      expect(Papers::NpmPackage.full_introspected_entries).to eq([{
        'name' => 'npm_package',
        'version' => '1.2.3'
      }])
    end

    it 'returns an empty array when the dependencies and devDependencies keys are not defined' do
      Papers::NpmPackage.stub(:package)
                    .and_return({})

      expect(Papers::NpmPackage.full_introspected_entries).to eq([])
    end
  end

  describe "#introspected" do
    it "returns an array of name-version strings" do
      Papers::NpmPackage.stub(:full_introspected_entries)
                           .and_return([{
                                          'name' => 'npm_package',
                                          'version' => '1.2.3'
                                        }])

      expect(Papers::NpmPackage.introspected).to eq(["npm_package-1.2.3"])
    end

    it "returns an empty array when the dependencies key is not defined" do
      Papers::NpmPackage.stub(:full_introspected_entries)
                           .and_return([])

      expect(Papers::NpmPackage.introspected).to eq([])
    end
  end
end