"""Tests for GPS plotting functionality."""
import pytest
from gpmf import gps_plot


class TestPlotting:
    """Test GPS track plotting."""
    
    def test_plot_gps_trace_exists(self):
        """Test that plot_gps_trace function exists."""
        assert hasattr(gps_plot, 'plot_gps_trace')
        assert callable(gps_plot.plot_gps_trace)
    
    def test_plot_gps_trace_from_stream_exists(self):
        """Test that plot_gps_trace_from_stream function exists."""
        assert hasattr(gps_plot, 'plot_gps_trace_from_stream')
        assert callable(gps_plot.plot_gps_trace_from_stream)


class TestCoordinateHandling:
    """Test coordinate handling in plotting."""
    
    def test_coordinate_validation(self):
        """Test coordinate validation."""
        # Valid coordinates
        valid_coords = [
            (0.0, 0.0),  # Null Island
            (37.7749, -122.4194),  # San Francisco
            (51.5074, -0.1278),  # London
            (-33.8688, 151.2093),  # Sydney
        ]
        
        for lat, lon in valid_coords:
            assert -90 <= lat <= 90
            assert -180 <= lon <= 180
    
    def test_empty_track_handling(self):
        """Test handling of empty GPS tracks."""
        # Empty track should not crash plotting
        empty_track = []
        assert len(empty_track) == 0


class TestMapRendering:
    """Test map rendering functionality."""
    
    def test_basemap_support(self):
        """Test that basemap rendering is supported."""
        # Should support contextily basemaps
        # This is integration with contextily
        pass
    
    def test_plot_styling(self):
        """Test that plot styling options exist."""
        # Should support customization
        # Color, line width, markers, etc.
        pass
