FFF extensions

This module provides extensions to FFF for simplifying the configuration and usage of fakes. More...

Macros
#define	RETURN_HANDLED_CONTEXT(FUNCNAME, CONTEXTTYPE, RESULTFIELD, CONTEXTPTRNAME, HANDLERBODY)
	Wrap custom fake body to extract defined context struct.

Detailed Description

This module provides extensions to FFF for simplifying the configuration and usage of fakes.

Macro Definition Documentation

RETURN_HANDLED_CONTEXT

#define RETURN_HANDLED_CONTEXT	(		FUNCNAME,
			CONTEXTTYPE,
			RESULTFIELD,
			CONTEXTPTRNAME,
			HANDLERBODY )

#include <zephyr/fff_extensions.h>

Value:

        if (FUNCNAME##_fake.return_val_seq_len) {                             \
                CONTEXTTYPE * const contexts =                                \
                CONTAINER_OF(FUNCNAME##_fake.return_val_seq,                  \
                                CONTEXTTYPE, RESULTFIELD);                    \
                size_t const seq_idx = (FUNCNAME##_fake.return_val_seq_idx <  \
                                        FUNCNAME##_fake.return_val_seq_len) ? \
                                        FUNCNAME##_fake.return_val_seq_idx++ :\
                                        FUNCNAME##_fake.return_val_seq_idx - 1;\
                CONTEXTTYPE * const CONTEXTPTRNAME = &contexts[seq_idx];      \
                HANDLERBODY;                                                  \
        }                                                                     \
        return FUNCNAME##_fake.return_val

Wrap custom fake body to extract defined context struct.

Add extension macro for simplified creation of fake functions needing call-specific context data.

This macro enables a fake to be implemented as follows and requires no familiarity with the inner workings of FFF.

struct FUNCNAME##_custom_fake_context
{
    struct instance * const instance;
    int result;
};
 
int FUNCNAME##_custom_fake(
    const struct instance **instance_out)
{
    RETURN_HANDLED_CONTEXT(
        FUNCNAME,
        struct FUNCNAME##_custom_fake_context,
        result,
        context,
        {
            if (context != NULL)
            {
                if (context->result == 0)
                {
                    if (instance_out != NULL)
                    {
                        *instance_out = context->instance;
                    }
                }
                return context->result;
            }
            return FUNCNAME##_fake.return_val;
        }
    );
}

Parameters

FUNCNAME	Name of function being faked
CONTEXTTYPE	type of custom defined fake context struct
RESULTFIELD	name of field holding the return type & value
CONTEXTPTRNAME	expected name of pointer to custom defined fake context struct
HANDLERBODY	in-line custom fake handling logic