public async Task CreateNewCase_ValidationProblem()
{
// Arrange
var caseModel = new NewCaseModel
{
CaseNumber = "Cn1",
AppealNumber = 0,
CaseTypeId = 1,
CourtId = 1,
LawyerId = 1,
LocationId = 1
};
_sut.ModelState.AddModelError("Field", "Sample Error Details");
// Act
await _sut.CreateNewCase(caseModel);
// Assert
await _mockCourtCasesService.DidNotReceiveWithAnyArgs().ExistsCaseNumberAsync(default, default);