require 'spec_helper'

describe GDAL::Dataset do
  let(:file_path) do
    File.expand_path('../../support/images/osgeo/geotiff/GeogToWGS84GeoKey/GeogToWGS84GeoKey5.tif', __dir__)
  end

  subject do
    described_class.open(file_path, 'r')
  end

  describe '#access_flag' do
    it 'returns the flag that was used to open the dataset' do
      expect(subject.access_flag).to eq :GA_ReadOnly
    end
  end

  describe '#driver' do
    it 'returns the driver that was used to open the dataset' do
      expect(subject.driver).to be_a GDAL::Driver
    end
  end

  describe '#file_list' do
    it 'returns an array that includes the file that represents the dataset' do
      expect(subject.file_list).to be_an Array
      expect(subject.file_list).to include(file_path)
    end
  end

  describe '#flush_cache' do
    it 'returns nil' do
      expect(subject.flush_cache).to be_nil
    end
  end

  describe '#raster_x_size' do
    it 'returns a Fixnum' do
      expect(subject.raster_x_size).to eq 101
    end
  end

  describe '#raster_y_size' do
    it 'returns a Fixnum' do
      expect(subject.raster_y_size).to eq 101
    end
  end

  describe '#raster_count' do
    it 'returns a Fixnum' do
      expect(subject.raster_count).to eq 1
    end
  end

  describe '#raster_band' do
    it 'returns a GDAL::RasterBand' do
      expect(subject.raster_band(1)).to be_a GDAL::RasterBand
    end
  end

  describe '#add_band' do
    it 'raises a GDAL::CPLErrFailure' do
      skip 'Figure out why this causes a segfault'

      expect {
        subject.add_band(:GDT_Byte)
      }.to raise_exception(GDAL::CPLErrFailure)
    end
  end

  describe '#create_mask_band' do
    context 'no flags given' do
      it 'returns true' do
        expect(subject.create_mask_band(0)).to eq true
      end
    end
  end

  describe '#projection' do
    it 'returns the projection string' do
      expect(subject.projection).to eq %(GEOGCS[\"unknown\",DATUM[\"unknown\",SPHEROID[\"Bessel 1841\",6377397.155,299.1528128000008,AUTHORITY[\"EPSG\",\"7004\"]],TOWGS84[598.1,73.7,418.2,0.202,0.045,-2.455,6.7]],PRIMEM[\"Greenwich\",0],UNIT[\"degree\",0.0174532925199433]])
    end
  end

  describe '#projection=' do
    it 'returns the new projection' do
      proj = subject.projection
      expect(subject.projection = proj).to eq proj
      expect(subject.projection).to eq proj
    end
  end

  describe '#geo_transform' do
    it 'returns a GDAL::GeoTransform' do
      expect(subject.geo_transform).to be_a GDAL::GeoTransform
    end
  end
end