hpesoj / mockup

A header-only mocking framework for C++17

Mockup

Mockup is a header-only mocking library for C++17.

Mockup is in the very early stages of development, and may change substantially in the future. Use at your own risk.

Features

• All function calls are recorded and can be checked afterwards
• Relaxed by default (all calls are allowed; behaviours repeat)
• No macros (a single convenience macro may be provided to support C++11/14)
• No compiler-specific vtable magic
• And more TBD...

Quick example

Given an interface:

struct foo {
    virtual int bar(int x) = 0;
};

We can write a test class:

#include <mockup/mockup.hpp>

using namespace mockup;

struct test_foo : foo {
    int bar(int x) override {
        return call<&foo::bar>(*this, x);
    }
};

And then write tests using mock objects:

// Create our mock object.
mock<test_foo> mock_foo;

// Tell it to return 42 when passed 7.
mock_foo.when<&foo::bar>(7)(return_(42));

// The mock object will behave as instructed.
assert(mock_foo->bar(7) == 42);

// Check that the function was invoked as expected.
assert(mock_foo.invoked<&foo::bar>(7));

// We can also check using wildcards.
assert(mock_foo.invoked<&foo::bar>(_));