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Questions tagged [argument-matching]

Argument matching is the process by which the actual arguments passed to a function are matched to the formal arguments of the function. Languages vary in how they match arguments, from exact-matching only to complicated and flexible rules (such as in R).

Argument matching is the process by which the actual passed to a function are matched to the formal arguments of the function. Languages vary in how they match arguments, from exact-matching only to complicated and flexible rules (such as in ).

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Why does R use partial matching?

I know that for a list, partial matching is done when indexing using the basic operators $ and [[. For example: ll <- list(yy=1) ll$y [1] 1 But I am still an R newbie and this is new for me, partial matching of function arguments: h <-…
agstudy
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Abbreviation of "collapse" in paste?

Using the command paste in R, I wanted to use both arguments sep and collapse, but you cannot abbreviate collapse to coll or even collaps. Yet for other functions partial abbreviation works. For example: paste(letters, colla=", ") # [1] "a , " "b ,…
user1879178
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Why does Mockito throw up when accessing a mock while verifying another one?

See this example: class Foo { } class Bar { void takeIt(int i, String arg) { System.out.println(arg + i); } } public class Mcve { @Test public void passes() { Foo foo = Mockito.mock(Foo.class); Bar bar =…
GhostCat
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Python argument matching for f(a, *b)

def f(a,*b): print(a,b) for the function f defined as above, if I call f(1, *(2,3)) it prints 1, (2,3) as expected. However calling f(a=1, *(2,3)) causes an error: TypeError: f() got multiple values for argument 'a' Any positional argument…
Royalblue
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Setup argment matcher with IEnumerable in NSubstitue

I am working on a unit test for a project and I cannot figure out how to get NSubstitute to work the way I would expect it to. The issue I am having is that the code I was to substitute is in a while loop and depending on what is returned from the…
ninja coder
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Argument matchers for type parameters when using Mockito

I was trying to find out if I can use something like the any argument matcher for a method with type parameters: when(store.getItems[Product](any[FilterParams])) .thenReturn(allProducts) When running the code with the above snippet, I get…
ssmallya
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ArgumentMatcher for Kotlin

I'm trying to use ArgumentMatcher in my tests. I do next: Mockito.`when`(someRepository.save( argThat { it.name == someName } // Here I want to do mock for all objects with name someName )).thenReturn(save(someEntity)) And I get next…
Valeriy K.
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How to stub a method by matching an argument by a superclass in NSubstitute?

Referring to the following sample code: using NSubstitute; using NUnit.Framework; public class Class1 { } public class Class2 { public void Method(Class1 class1) { } } public class Class3 : Class1 { } [TestFixture] public class…
Chry Cheng
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Require exactly one set of multiple arguments in R

I'm in the process of developing a framework in R and would like one of my functions to be multi-purposed. I would like to achieve this by requiring that exactly one set of arguments be passed. In other words, I would like to write a function foo…
Alex Firsov
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how to pass in multiple ArgumentMatchers to Mockito

I have two custom ArgumentMatchers and I'd like my mock to return a different value based on the argument value. Example: when(myMock.method(new ArgMatcher1()).thenReturn(false); when(myMock.method(new…
Chris Morris
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C++ concept for argument matching of const/non-const references to specified type on template functions

I want to know if there is a better way to solve the code duplication problem on template functions like this struct Z { void doSomething() { std::cout << "non-const version\n"; } void doSomething() const { std::cout << "const version\n";…
Ricardo Capurro
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Using argument matchers when stubbing a method call results in type error

This is my code: class Foo { int bar(int x) => x; } class MockFoo extends Mock implements Foo {} void main() { final foo = MockFoo(); when(foo.bar(any)).thenReturn(42); print(foo.bar(7)); // prints 42 } How come passing in any as an…
Joel Castro
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Is it possible using variables of ArgumentMatchers?

Let's say I have an interface looks like this. interface Some { /** * Does some on specified array with specified index and returns the array. * * @param array the array. * @param index the index. * @returns given…
Jin Kwon
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Unable to extract features from time series data using 'extract_features' method from tsfresh package

I am running the code in Spyder(3.3.3) from Anaconda3 2019.03(Python 3.7.3 64-bit). And using tsfresh 0.11.1 The code I'm running deals with a huge set of time-series data that has sensor data(data of 17 sensors in 17 different files. (dataset url :…
Shivani Gupta
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Match a func delegate in argument matcher in nsubstitute Received method

I am trying to check if a method is called a specific number of times on a mock instance of a class. The problem is the method has a func delegate and that is not matching. I have the following scenario: public interface ISomeService: IService { …
Sunil Kumar
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