forked from fluentassertions/fluentassertions
/
ExceptionAssertionSpecs.cs
1075 lines (920 loc) · 55 KB
/
ExceptionAssertionSpecs.cs
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using System;
using System.Collections.Generic;
using System.Diagnostics;
using Xunit;
using Xunit.Sdk;
using static FluentAssertions.Extensions.FluentTimeSpanExtensions;
namespace FluentAssertions.Specs
{
public class ExceptionAssertionSpecs
{
[Fact]
public void ThrowExactly_when_subject_throws_subclass_of_expected_exception_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new ArgumentNullException();
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
act.Should().ThrowExactly<ArgumentException>("because {0} should do that", "Does.Do");
throw new XunitException("This point should not be reached.");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match("Expected type to be System.ArgumentException because Does.Do should do that, but found System.ArgumentNullException.");
}
}
[Fact]
public void ThrowExactly_when_subject_throws_expected_exception_it_should_not_do_anything()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new ArgumentNullException();
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().ThrowExactly<ArgumentNullException>();
}
#region Outer Exceptions
[Fact]
public void When_subject_throws_expected_exception_with_an_expected_message_it_should_not_do_anything()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("some message"));
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
testSubject.Invoking(x => x.Do()).Should().Throw<InvalidOperationException>().WithMessage("some message");
}
[Fact]
public void When_subject_throws_expected_exception_but_with_unexpected_message_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("some"));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
testSubject
.Invoking(x => x.Do())
.Should().Throw<InvalidOperationException>()
.WithMessage("some message");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match(
"Expected exception message to match the equivalent of*\"some message\", but*\"some\" does not*");
}
}
[Fact]
public void When_subject_throws_expected_exception_with_message_starting_with_expected_message_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("expected message"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = testSubject.Do;
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<InvalidOperationException>()
.WithMessage("expected mes*");
}
[Fact]
public void When_subject_throws_expected_exception_with_message_that_does_not_start_with_expected_message_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("OxpectOd message"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => testSubject
.Invoking(s => s.Do())
.Should().Throw<InvalidOperationException>()
.WithMessage("Expected mes");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<Exception>()
.WithMessage("Expected exception message to match the equivalent of*\"Expected mes*\", but*\"OxpectOd message\" does not*");
}
[Fact]
public void When_subject_throws_expected_exception_with_message_starting_with_expected_equivalent_message_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("Expected Message"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = testSubject.Do;
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<InvalidOperationException>()
.WithMessage("expected mes*");
}
[Fact]
public void When_subject_throws_expected_exception_with_message_that_does_not_start_with_equivalent_message_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("OxpectOd message"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => testSubject
.Invoking(s => s.Do())
.Should().Throw<InvalidOperationException>()
.WithMessage("expected mes");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<Exception>()
.WithMessage("Expected exception message to match the equivalent of*\"expected mes*\", but*\"OxpectOd message\" does not*");
}
[Fact]
public void When_subject_throws_some_exception_with_unexpected_message_it_should_throw_with_clear_description()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does subjectThatThrows = Does.Throw(new InvalidOperationException("message1"));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
subjectThatThrows
.Invoking(x => x.Do())
.Should().Throw<InvalidOperationException>()
.WithMessage("message2", "because we want to test the failure {0}", "message");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match(
"Expected exception message to match the equivalent of \"message2\" because we want to test the failure message, but \"message1\" does not*");
}
}
[Fact]
public void When_subject_throws_some_exception_with_an_empty_message_it_should_throw_with_clear_description()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does subjectThatThrows = Does.Throw(new InvalidOperationException(""));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
subjectThatThrows
.Invoking(x => x.Do())
.Should().Throw<InvalidOperationException>()
.WithMessage("message2");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match(
"Expected exception message to match the equivalent of \"message2\"*, but \"\"*");
}
}
[Fact]
public void When_subject_throws_some_exception_with_message_which_contains_complete_expected_exception_and_more_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does subjectThatThrows = Does.Throw(new ArgumentNullException("someParam", "message2"));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
subjectThatThrows
.Invoking(x => x.Do("something"))
.Should().Throw<ArgumentNullException>()
.WithMessage("message2");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match(
"Expected exception message to match the equivalent of*\"message2\", but*\"message2*Parameter name: someParam\"*");
}
}
[Fact]
public void When_no_exception_was_thrown_but_one_was_expected_it_should_clearly_report_that()
{
try
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.NotThrow();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
testSubject.Invoking(x => x.Do()).Should().Throw<Exception>("because {0} should do that", "Does.Do");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Be(
"Expected a <System.Exception> to be thrown because Does.Do should do that, but no exception was thrown.");
}
}
[Fact]
public void When_subject_throws_another_exception_than_expected_it_should_include_details_of_that_exception()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var actualException = new ArgumentException();
Does testSubject = Does.Throw(actualException);
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
testSubject
.Invoking(x => x.Do())
.Should().Throw<InvalidOperationException>("because {0} should throw that one", "Does.Do");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().StartWith(
"Expected a <System.InvalidOperationException> to be thrown because Does.Do should throw that one, but found a <System.ArgumentException>:");
ex.Message.Should().Contain(actualException.Message);
}
}
[Fact]
public void When_subject_throws_exception_with_message_with_braces_but_a_different_message_is_expected_it_should_report_that()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does subjectThatThrows = Does.Throw(new Exception("message with {}"));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
subjectThatThrows
.Invoking(x => x.Do("something"))
.Should().Throw<Exception>()
.WithMessage("message without");
throw new XunitException("this point should not be reached");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
ex.Message.Should().Match(
"Expected exception message to match the equivalent of*\"message without\"*, but*\"message with {}*");
}
}
[Fact]
public void When_asserting_with_an_aggregate_exception_type_the_asserts_should_occur_against_the_aggregate_exception()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new AggregateException("Outer Message", new Exception("Inner Message")));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = testSubject.Do;
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<AggregateException>()
.WithMessage("Outer Message*")
.WithInnerException<Exception>()
.WithMessage("Inner Message");
}
#endregion
#region Inner Exceptions
[Fact]
public void When_subject_throws_an_exception_with_the_expected_inner_exception_it_should_not_do_anything()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new Exception("", new ArgumentException()));
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
testSubject
.Invoking(x => x.Do())
.Should().Throw<Exception>()
.WithInnerException<ArgumentException>();
}
[Fact]
public void WithInnerExceptionExactly_no_paramters_when_subject_throws_subclass_of_expected_inner_exception_it_should_throw_with_clear_description()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var innerException = new ArgumentNullException();
Action act = () => throw new BadImageFormatException("", innerException);
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<BadImageFormatException>()
.WithInnerExceptionExactly<ArgumentException>();
throw new XunitException("This point should not be reached.");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
var expectedMessage = BuildExpectedMessageForWithInnerExceptionExactly("Expected inner System.ArgumentException, but found System.ArgumentNullException with message", innerException.Message);
ex.Message.Should().Be(expectedMessage);
}
}
[Fact]
public void WithInnerExceptionExactly_no_paramters_when_subject_throws_expected_inner_exception_it_should_not_do_anything()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new BadImageFormatException("", new ArgumentNullException());
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<BadImageFormatException>()
.WithInnerExceptionExactly<ArgumentNullException>();
}
[Fact]
public void WithInnerExceptionExactly_when_subject_throws_subclass_of_expected_inner_exception_it_should_throw_with_clear_description()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var innerException = new ArgumentNullException();
Action act = () => throw new BadImageFormatException("", innerException);
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<BadImageFormatException>()
.WithInnerExceptionExactly<ArgumentException>("because {0} should do just that", "the action");
throw new XunitException("This point should not be reached.");
}
catch (XunitException ex)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
var expectedMessage = BuildExpectedMessageForWithInnerExceptionExactly("Expected inner System.ArgumentException because the action should do just that, but found System.ArgumentNullException with message", innerException.Message);
ex.Message.Should().Be(expectedMessage);
}
}
[Fact]
public void WithInnerExceptionExactly_when_subject_throws_expected_inner_exception_it_should_not_do_anything()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new BadImageFormatException("", new ArgumentNullException());
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<BadImageFormatException>()
.WithInnerExceptionExactly<ArgumentNullException>("because {0} should do just that", "the action");
}
private static string BuildExpectedMessageForWithInnerExceptionExactly(string because, string innerExceptionMessage)
{
var expectedMessage = string.Format("{0} \"{1}\"\n.", because, innerExceptionMessage);
return expectedMessage;
}
[Fact]
public void When_subject_throws_an_exception_with_an_unexpected_inner_exception_it_should_throw_with_clear_description()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var innerException = new NullReferenceException();
Does testSubject = Does.Throw(new Exception("", innerException));
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
testSubject
.Invoking(x => x.Do())
.Should().Throw<Exception>()
.WithInnerException<ArgumentException>("because {0} should do just that", "Does.Do");
throw new XunitException("This point should not be reached");
}
catch (XunitException exc)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
exc.Message.Should().StartWith(
"Expected inner System.ArgumentException because Does.Do should do just that, but found System.NullReferenceException");
exc.Message.Should().Contain(innerException.Message);
}
}
[Fact]
public void When_subject_throws_an_exception_without_expected_inner_exception_it_should_throw_with_clear_description()
{
try
{
Does testSubject = Does.Throw<Exception>();
testSubject.Invoking(x => x.Do()).Should().Throw<Exception>()
.WithInnerException<InvalidOperationException>();
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
ex.Message.Should().Be(
"Expected inner System.InvalidOperationException, but the thrown exception has no inner exception.");
}
}
[Fact]
public void
When_subject_throws_an_exception_without_expected_inner_exception_and_has_reason_it_should_throw_with_clear_description
()
{
try
{
Does testSubject = Does.Throw<Exception>();
testSubject.Invoking(x => x.Do()).Should().Throw<Exception>()
.WithInnerException<InvalidOperationException>("because {0} should do that", "Does.Do");
throw new XunitException("This point should not be reached");
}
catch (XunitException ex)
{
ex.Message.Should().Be(
"Expected inner System.InvalidOperationException because Does.Do should do that, but the thrown exception has no inner exception.");
}
}
[Fact]
public void When_an_inner_exception_matches_exactly_it_should_allow_chaining_more_asserts_on_that_exception_type()
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () =>
throw new ArgumentException("OuterMessage", new InvalidOperationException("InnerMessage"));
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act
.Should().ThrowExactly<ArgumentException>()
.WithInnerExceptionExactly<InvalidOperationException>()
.Where(i => i.Message == "InnerMessage");
}
#endregion
#region Miscellaneous
[Fact]
public void When_getting_value_of_property_of_thrown_exception_it_should_return_value_of_property()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
const string SomeParamNameValue = "param";
Does target = Does.Throw(new ExceptionWithProperties(SomeParamNameValue));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = target.Do;
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<ExceptionWithProperties>().And.Property.Should().Be(SomeParamNameValue);
}
[Fact]
public void When_validating_a_subject_against_multiple_conditions_it_should_support_chaining()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new InvalidOperationException("message", new ArgumentException("inner message")));
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
testSubject
.Invoking(x => x.Do())
.Should().Throw<InvalidOperationException>()
.WithInnerException<ArgumentException>()
.WithMessage("inner message");
}
[Fact]
public void When_a_yielding_enumerable_throws_an_expected_exception_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Func<IEnumerable<char>> act = () => MethodThatUsesYield("aaa!aaa");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.Enumerating().Should().Throw<Exception>();
}
private static IEnumerable<char> MethodThatUsesYield(string bar)
{
foreach (var character in bar)
{
if (character.Equals('!'))
{
throw new Exception("No exclamation marks allowed.");
}
yield return char.ToUpper(character);
}
}
[Fact]
public void When_custom_condition_is_not_met_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new ArgumentException("");
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
act
.Should().Throw<ArgumentException>("")
.Where(e => e.Message.Length > 0, "an exception must have a message");
throw new XunitException("This point should not be reached");
}
catch (XunitException exc)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
exc.Message.Should().StartWith(
"Expected exception where (e.Message.Length > 0) because an exception must have a message, but the condition was not met");
}
}
[Fact]
public void When_a_2nd_condition_is_not_met_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new ArgumentException("Fail");
try
{
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
act
.Should().Throw<ArgumentException>("")
.Where(e => e.Message.Length > 0)
.Where(e => e.Message == "Error");
throw new XunitException("This point should not be reached");
}
catch (XunitException exc)
{
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
exc.Message.Should().StartWith(
"Expected exception where (e.Message == \"Error\"), but the condition was not met");
}
catch (Exception exc)
{
exc.Message.Should().StartWith(
"Expected exception where (e.Message == \"Error\"), but the condition was not met");
}
}
[Fact]
public void When_custom_condition_is_met_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange / Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => throw new ArgumentException("");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act
.Should().Throw<ArgumentException>()
.Where(e => e.Message.Length == 0);
}
[Fact]
public void
When_two_exceptions_are_thrown_and_the_assertion_assumes_there_can_only_be_one_it_should_fail
()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does testSubject = Does.Throw(new AggregateException(new Exception(), new Exception()));
Action throwingMethod = testSubject.Do;
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => throwingMethod.Should().Throw<Exception>().And.Message.Should();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<Exception>();
}
[Fact]
public void When_an_exception_of_a_different_type_is_thrown_it_should_include_the_type_of_the_thrown_exception()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action throwException = () => throw new ExceptionWithEmptyToString();
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act =
() => throwException.Should().Throw<ArgumentNullException>();
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().Throw<XunitException>()
.WithMessage(
string.Format("*System.ArgumentNullException*{0}*",
typeof(ExceptionWithEmptyToString)));
}
#endregion
#region Not Throw
[Fact]
public void When_a_specific_exception_should_not_be_thrown_but_it_was_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does foo = Does.Throw(new ArgumentException("An exception was forced"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action =
() => foo.Invoking(f => f.Do()).Should().NotThrow<ArgumentException>("we passed valid arguments");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action
.Should().Throw<XunitException>().WithMessage(
"Did not expect System.ArgumentException because we passed valid arguments, " +
"but found*with message \"An exception was forced\"*");
}
[Fact]
public void When_a_specific_exception_should_not_be_thrown_but_another_was_it_should_succeed()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does foo = Does.Throw<ArgumentException>();
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
foo.Invoking(f => f.Do()).Should().NotThrow<InvalidOperationException>();
}
[Fact]
public void When_no_exception_should_be_thrown_but_it_was_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does foo = Does.Throw(new ArgumentException("An exception was forced"));
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () => foo.Invoking(f => f.Do()).Should().NotThrow("we passed valid arguments");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action
.Should().Throw<XunitException>().WithMessage(
"Did not expect any exception because we passed valid arguments, " +
"but found System.ArgumentException with message \"An exception was forced\"*");
}
[Fact]
public void When_no_exception_should_be_thrown_and_none_was_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Does foo = Does.NotThrow();
//-----------------------------------------------------------------------------------------------------------
// Act / Assert
//-----------------------------------------------------------------------------------------------------------
foo.Invoking(f => f.Do()).Should().NotThrow();
}
#if NET45 || NET47 || NETSTANDARD2_0 || NETCOREAPP2_0
#pragma warning disable CS1998
[Fact]
public void NotThrowAfter_when_subject_is_async_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
Action someAsyncAction = async () => { };
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () =>
someAsyncAction.Should().NotThrowAfter(1.Milliseconds(), 1.Milliseconds());
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<InvalidOperationException>()
.WithMessage("Cannot use action assertions on an async void method.*");
}
#pragma warning restore CS1998
[Fact]
public void NotThrowAfter_when_waitTime_is_negative_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var waitTime = -1.Milliseconds();
var pollInterval = 10.Milliseconds();
Action someAction = () => { };
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () =>
someAction.Should().NotThrowAfter(waitTime, pollInterval);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<ArgumentOutOfRangeException>()
.WithMessage("* value of waitTime must be non-negative*");
}
[Fact]
public void NotThrowAfter_when_pollInterval_is_negative_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var waitTime = 10.Milliseconds();
var pollInterval = -1.Milliseconds();
Action someAction = () => { };
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () =>
someAction.Should().NotThrowAfter(waitTime, pollInterval);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<ArgumentOutOfRangeException>()
.WithMessage("* value of pollInterval must be non-negative*");
}
[Fact]
public void NotThrowAfter_when_no_exception_should_be_thrown_after_wait_time_but_it_was_it_should_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var watch = Stopwatch.StartNew();
var waitTime = 100.Milliseconds();
var pollInterval = 10.Milliseconds();
Action throwLongerThanWaitTime = () =>
{
if (watch.Elapsed <= waitTime + (waitTime.Milliseconds / 2).Milliseconds())
throw new ArgumentException("An exception was forced");
};
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action action = () =>
throwLongerThanWaitTime.Should().NotThrowAfter(waitTime, pollInterval, "we passed valid arguments");
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
action.Should().Throw<XunitException>()
.WithMessage("Did not expect any exceptions after 0.100s because we passed valid arguments*");
}
[Fact]
public void NotThrowAfter_when_no_exception_should_be_thrown_after_wait_time_and_none_was_it_should_not_throw()
{
//-----------------------------------------------------------------------------------------------------------
// Arrange
//-----------------------------------------------------------------------------------------------------------
var watch = Stopwatch.StartNew();
var waitTime = 100.Milliseconds();
var pollInterval = 10.Milliseconds();
Action throwShorterThanWaitTime = () =>
{
if (watch.Elapsed <= (waitTime.Milliseconds / 2).Milliseconds())
throw new ArgumentException("An exception was forced");
};
//-----------------------------------------------------------------------------------------------------------
// Act
//-----------------------------------------------------------------------------------------------------------
Action act = () => throwShorterThanWaitTime.Should().NotThrowAfter(waitTime, pollInterval);
//-----------------------------------------------------------------------------------------------------------
// Assert
//-----------------------------------------------------------------------------------------------------------
act.Should().NotThrow();
}
#endif // NotThrowAfter tests
}