Mixing
Unit test multiple calls that “MustHaveHappenedOnceExactly”
I want to verify that the method I test calls a service multiple times with different arguments. The service method has a required and a optional argument:
public void Foo(object o1, object o2 = null);
I am expecting Foo to get called 2 times, once without and once with the optional parameter. The optional parameter should match a criteria. To test this I am using MustHaveHappenedOnceExactly from FakeItEasy:
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.IsNull()))
.MustHaveHappenedOnceExactly().Then(
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.Matches(p => p.Length == 2)))
.MustHaveHappenedOnceExactly());
What I do get is the following exception:
FakeItEasy.UserCallbackException: Argument matcher <p => (p.Length> == 2)> threw an exception. See inner exception for details. ---> System.NullReferenceException: Object reference not set to an instance of an object.
I assume that MustHaveHappenedOnceExactly checks all calls on Foo with the defined matches and thereby the second match throws an exception when Foo is called without Parameter. How can I avoid that exception and still test that Foo got called once with a specific argument?
c# unit-testing fakeiteasy
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
add a comment |
I want to verify that the method I test calls a service multiple times with different arguments. The service method has a required and a optional argument:
public void Foo(object o1, object o2 = null);
I am expecting Foo to get called 2 times, once without and once with the optional parameter. The optional parameter should match a criteria. To test this I am using MustHaveHappenedOnceExactly from FakeItEasy:
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.IsNull()))
.MustHaveHappenedOnceExactly().Then(
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.Matches(p => p.Length == 2)))
.MustHaveHappenedOnceExactly());
What I do get is the following exception:
FakeItEasy.UserCallbackException: Argument matcher <p => (p.Length> == 2)> threw an exception. See inner exception for details. ---> System.NullReferenceException: Object reference not set to an instance of an object.
I assume that MustHaveHappenedOnceExactly checks all calls on Foo with the defined matches and thereby the second match throws an exception when Foo is called without Parameter. How can I avoid that exception and still test that Foo got called once with a specific argument?
c# unit-testing fakeiteasy
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
add a comment |
I want to verify that the method I test calls a service multiple times with different arguments. The service method has a required and a optional argument:
public void Foo(object o1, object o2 = null);
I am expecting Foo to get called 2 times, once without and once with the optional parameter. The optional parameter should match a criteria. To test this I am using MustHaveHappenedOnceExactly from FakeItEasy:
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.IsNull()))
.MustHaveHappenedOnceExactly().Then(
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.Matches(p => p.Length == 2)))
.MustHaveHappenedOnceExactly());
What I do get is the following exception:
FakeItEasy.UserCallbackException: Argument matcher <p => (p.Length> == 2)> threw an exception. See inner exception for details. ---> System.NullReferenceException: Object reference not set to an instance of an object.
I assume that MustHaveHappenedOnceExactly checks all calls on Foo with the defined matches and thereby the second match throws an exception when Foo is called without Parameter. How can I avoid that exception and still test that Foo got called once with a specific argument?
c# unit-testing fakeiteasy
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
I want to verify that the method I test calls a service multiple times with different arguments. The service method has a required and a optional argument:
public void Foo(object o1, object o2 = null);
I am expecting Foo to get called 2 times, once without and once with the optional parameter. The optional parameter should match a criteria. To test this I am using MustHaveHappenedOnceExactly from FakeItEasy:
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.IsNull()))
.MustHaveHappenedOnceExactly().Then(
A.CallTo(() => testee.Method(A<object>.That.IsNotNull(), A<object>.That.Matches(p => p.Length == 2)))
.MustHaveHappenedOnceExactly());
What I do get is the following exception:
FakeItEasy.UserCallbackException: Argument matcher <p => (p.Length> == 2)> threw an exception. See inner exception for details. ---> System.NullReferenceException: Object reference not set to an instance of an object.
I assume that MustHaveHappenedOnceExactly checks all calls on Foo with the defined matches and thereby the second match throws an exception when Foo is called without Parameter. How can I avoid that exception and still test that Foo got called once with a specific argument?
c# unit-testing fakeiteasy
c# unit-testing fakeiteasy
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
edited Jan 2 at 12:08
Thomas Levesque
238k53499671
238k53499671
asked Jan 2 at 11:13
user2900970user2900970
5351316
asked Jan 2 at 11:13
user2900970user2900970
5351316
asked Jan 2 at 11:13
user2900970user2900970
5351316
5351316
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Refactor the matcher to cater for the null i.e. .Matches(p => p != null && p.Length == 2)
A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.IsNull()
)
).MustHaveHappenedOnceExactly()
.Then(A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.Matches(p => p != null && p.Length == 2) //<--
)
).MustHaveHappenedOnceExactly()
);
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Refactor the matcher to cater for the null i.e. .Matches(p => p != null && p.Length == 2)
A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.IsNull()
)
).MustHaveHappenedOnceExactly()
.Then(A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.Matches(p => p != null && p.Length == 2) //<--
)
).MustHaveHappenedOnceExactly()
);
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
add a comment |
Refactor the matcher to cater for the null i.e. .Matches(p => p != null && p.Length == 2)
A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.IsNull()
)
).MustHaveHappenedOnceExactly()
.Then(A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.Matches(p => p != null && p.Length == 2) //<--
)
).MustHaveHappenedOnceExactly()
);
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
add a comment |
Refactor the matcher to cater for the null i.e. .Matches(p => p != null && p.Length == 2)
A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.IsNull()
)
).MustHaveHappenedOnceExactly()
.Then(A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.Matches(p => p != null && p.Length == 2) //<--
)
).MustHaveHappenedOnceExactly()
);
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
Refactor the matcher to cater for the null i.e. .Matches(p => p != null && p.Length == 2)
A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.IsNull()
)
).MustHaveHappenedOnceExactly()
.Then(A.CallTo(() => testee.Method(
A<object>.That.IsNotNull(),
A<object>.That.Matches(p => p != null && p.Length == 2) //<--
)
).MustHaveHappenedOnceExactly()
);
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
answered Jan 2 at 11:51
NkosiNkosi
119k17137201
119k17137201
add a comment |
add a comment |
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