public void GetRowAndColumn_Vertices_Null()
{
List <Vertex> vertices = null;
Action act = () => TestImageGrid.GetRowAndColumn(vertices);
act.Should().Throw <ArgumentNullException>("no vertices list is supplied");
}
public void GetRowAndColumn_Vertices_TooFew()
{
List <Vertex> vertices = new List <Vertex>();
//check count is < 3 before act
vertices.Count.Should().BeLessThan(3, "test action required input of less than three vertices to be valid ");
//act
Action act = () => TestImageGrid.GetRowAndColumn(vertices);
act.Should().Throw <ArgumentOutOfRangeException>($"expected list of 3 vertices got {vertices.Count}");
}
[DataRow(65)] //outwith grid upper
public void GetRowAndColumn_Vertices_InvalidVertexX(int invalidX)
{
List <Vertex> vertices = new List <Vertex>()
{
new Vertex()
{
X = invalidX
}, new Vertex(), new Vertex()
};
Action act = () => TestImageGrid.GetRowAndColumn(vertices);
act.Should().Throw <ArgumentOutOfRangeException>($"invalid vertex X coordinate ({invalidX})");
}
public void GetRowAndColumn_GridBoundaries(string expectedRowAndColumn, int x1, int y1, int x2, int y2, int x3, int y3)
{
var expectedVertices = new List <Vertex>(3)
{
new Vertex {
X = x1, Y = y1
}
, new Vertex {
X = x2, Y = y2
}
, new Vertex {
X = x3, Y = y3
}
};
var rowAndColumn = TestImageGrid.GetRowAndColumn(expectedVertices);
rowAndColumn.Should().Be(expectedRowAndColumn, "the row letter and column number should be as expected");
}
