public async Task ContactAccountExistsAsync_WhenAccountNumberExistsWithinAccounting_ReturnsTrue()
{
IAccountingRepository sut = CreateSut();
bool result = await sut.ContactAccountExistsAsync(WithExistingAccountingNumber(), WithExistingAccountNumberForContactAccount());
Assert.That(result, Is.True);
}
public async Task ContactAccountExistsAsync_WhenAccountingNumberDoesNotExist_ReturnsFalse()
{
IAccountingRepository sut = CreateSut();
bool result = await sut.ContactAccountExistsAsync(WithNonExistingAccountingNumber(), WithExistingAccountNumberForContactAccount());
Assert.That(result, Is.False);
}
public void ContactAccountExistsAsync_WhenAccountNumberIsWhiteSpace_ThrowsArgumentNullException()
{
IAccountingRepository sut = CreateSut();
ArgumentNullException result = Assert.ThrowsAsync <ArgumentNullException>(async() => await sut.ContactAccountExistsAsync(WithExistingAccountingNumber(), " "));
Assert.That(result.ParamName, Is.EqualTo("accountNumber"));
}