public void Test_InitLightsGridInSolvableState_method()
{
var dimension = 5;
var populator = new Mock <ILightsPopulator>();
var lightsGrid1 = It.IsAny <LightsGrid>();
populator.Setup(p => p.InitLightsGrid(dimension)).Returns(lightsGrid1);
var lightsGrid2 = It.IsAny <LightsGrid>();
populator.Setup(p => p.ResetAllLights(lightsGrid1)).Returns(lightsGrid2);
var lightsGrid3 = It.IsAny <LightsGrid>();
populator.Setup(p => p.PopulateSolvableState(lightsGrid2)).Returns(lightsGrid3);
var mng = new LightsManager(populator.Object, null);
var result = mng.InitLightsGridInSolvableState(dimension);
populator.Verify(p => p.InitLightsGrid(dimension), Times.Once);
populator.Verify(p => p.ResetAllLights(lightsGrid1), Times.Once);
populator.Verify(p => p.PopulateSolvableState(lightsGrid2), Times.Once);
Assert.AreSame(result, lightsGrid3);
}