Search code examples
c#.netunit-testingfluent-assertions

Fluent assertion should be greater than always pass

I am trying to test my collection using :

  var costByFactoryt = dataAccess.GetcostPerFactoryt(null, null);
  costByFactoryt.Count().Should().BeGreaterThan(0);
  costByFactoryt.Select(x => x.Cost.Should().BeGreaterThan(100));

But the problem is , if I change the last line of code to,

 costByFactoryt.Select(x => x.Cost.Should().BeGreaterThan(1000));

or

costingByCircuit.Select(x => x.Cost.Should().BeLessThan(100));

It still pass , which is wrong.

What I am trying to test is , all cost should be greater than 100.

Solution

  • It simply doesn't work that way because LINQ Select doesn't iterate the collection => your test code is not executed

    According to Fluent Assertions documentation

    The correct syntax should be 

    costingByCircuit.Select(x => x.Cost).Should().OnlyContain(x => x > 100);