# -*- coding: utf-8 -*-
import numpy as np
from vispy.scene.visuals import Markers
from vispy.testing import (requires_application, TestingCanvas,
                           run_tests_if_main)
from vispy.testing.image_tester import assert_image_approved


@requires_application()
def test_markers():
    """Test basic marker / point-sprite support"""
    # this is probably too basic, but it at least ensures that point sprites
    # work for people
    np.random.seed(57983)
    data = np.random.normal(size=(30, 2), loc=50, scale=10)
    
    with TestingCanvas() as c:
        marker = Markers(parent=c.scene)
        marker.set_data(data)
        assert_image_approved(c.render(), "visuals/markers.png")

    # Test good correlation at high-dpi
    with TestingCanvas(px_scale=2) as c:
        marker = Markers(parent=c.scene)
        marker.set_data(data)
        assert_image_approved(c.render(), "visuals/markers.png")


run_tests_if_main()