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C#

C# static code analysis

Unique rules to find Bugs, Vulnerabilities, Security Hotspots, and Code Smells in your C# code

  • All rules 493
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  • Code Smell335

  • Quick Fix 61
Filtered: 9 rules found
tests
    Impact
      Clean code attribute
        1. Test method signatures should be correct

           Code Smell
        2. "[ExpectedException]" should not be used

           Code Smell
        3. Assertion arguments should be passed in the correct order

           Code Smell
        4. Assertions should be complete

           Code Smell
        5. "Thread.Sleep" should not be used in tests

           Code Smell
        6. Literal boolean values should not be used in assertions

           Code Smell
        7. Tests should include assertions

           Code Smell
        8. Test classes should contain at least one test case

           Code Smell
        9. Tests should not be ignored

           Code Smell

        "[ExpectedException]" should not be used

        intentionality - clear
        maintainability
        Code Smell
        • tests

        Why is this an issue?

        How can I fix it?

        More Info

        It should be clear to a casual reader what code a test is testing and what results are expected. Unfortunately, that’s not usually the case with the ExpectedException attribute since an exception could be thrown from almost any line in the method.

        This rule detects MSTest and NUnit ExpectedException attribute.

        Exceptions

        This rule ignores:

        • single-line tests, since it is obvious in such methods where the exception is expected to be thrown
        • tests when it tests control flow and assertion are present in either a catch or finally clause
        [TestMethod]
        [ExpectedException(typeof(InvalidOperationException))]
        public void UsingTest()
        {
            Console.ForegroundColor = ConsoleColor.Black;
            try
            {
                using var _ = new ConsoleAlert();
                Assert.AreEqual(ConsoleColor.Red, Console.ForegroundColor);
                throw new InvalidOperationException();
            }
            finally
            {
                Assert.AreEqual(ConsoleColor.Black, Console.ForegroundColor); // The exception itself is not relevant for the test.
            }
        }
        
        public sealed class ConsoleAlert : IDisposable
        {
            private readonly ConsoleColor previous;
        
            public  ConsoleAlert()
            {
                previous = Console.ForegroundColor;
                Console.ForegroundColor = ConsoleColor.Red;
            }
        
            public void Dispose() =>
                Console.ForegroundColor = previous;
        }
        
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