public async Task EditDiagram()
{
var firstDiagram = SampleDiagram;
itemsMocker.Setup(i => i.Find(It.Is <int>(id => id == firstDiagram.DbDiagramId))).Returns(firstDiagram);
itemsMocker.Setup(i => i.Remove(It.Is <DbDiagram>(item => CompareSample(item, firstDiagram))));
itemsMocker.Setup(i => i.Add(It.Is <DbDiagram>(item => CompareSample(item, OtherSampleDiagram))));
testerMocker.Setup(c => c.TestTableSetup(It.Is <string>(q => OtherSampleDiagram.CreationQuery.Equals(q)))).ReturnsAsync("OK").Verifiable();
contextMocker.Setup(c => c.Diagrams).Returns(itemsMocker.Object);
sut = new DiagramController(contextMocker.Object, testerMocker.Object);
await sut.Edit(firstDiagram.DbDiagramId);
await sut.Edit(OtherSampleDiagram);
testerMocker.Verify(c => c.TestTableSetup(OtherSampleDiagram.CreationQuery), Times.Once);
}
