Atlas - variator_exhaustive.c
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1/* See COPYING.txt for the full license governing this code. */
2/**
3 * \file variator_exhaustive.c
4 *
5 * Source file for the variator that tests the SUT with all the different
6 * variations of input parameters that are valid.
7 */
8
9#include <time.h>
10#include <SDL_test.h>
11#include "SDL_visualtest_sut_configparser.h"
12#include "SDL_visualtest_exhaustive_variator.h"
13
14static int
15NextVariation(SDLVisualTest_Variation* variation,
16              SDLVisualTest_SUTConfig* config)
17{
18    int i, carry;
19    if(!variation)
20    {
21        SDLTest_LogError("variation argument cannot be NULL");
22        return -1;
23    }
24    if(!config)
25    {
26        SDLTest_LogError("config argument cannot be NULL");
27        return -1;
28    }
29
30    carry = 1;
31    for(i = 0; i < variation->num_vars; i++)
32    {
33        carry = SDLVisualTest_NextValue(&variation->vars[i], &config->options[i]);
34        if(carry != 1)
35            break;
36    }
37
38    if(carry == 1) /* we're done, we've tried all possible variations */
39        return 0;
40    if(carry == 0)
41        return 1;
42    SDLTest_LogError("NextVariation() failed");
43    return -1;
44}
45
46int
47SDLVisualTest_InitExhaustiveVariator(SDLVisualTest_ExhaustiveVariator* variator,
48                                     SDLVisualTest_SUTConfig* config)
49{
50    if(!variator)
51    {
52        SDLTest_LogError("variator argument cannot be NULL");
53        return 0;
54    }
55    if(!config)
56    {
57        SDLTest_LogError("config argument cannot be NULL");
58        return 0;
59    }
60
61    SDLTest_FuzzerInit(time(NULL));
62
63    variator->config = *config;
64    variator->variation.num_vars = 0;
65    variator->variation.vars = NULL;
66
67    return 1;
68}
69
70/* TODO: Right now variations where an option is not specified at all are not
71   tested for. This can be implemented by switching the on attribute for integer,
72   enum and string options to true and false. */
73char*
74SDLVisualTest_GetNextExhaustiveVariation(SDLVisualTest_ExhaustiveVariator* variator)
75{
76    int success;
77    if(!variator)
78    {
79        SDLTest_LogError("variator argument cannot be NULL");
80        return NULL;
81    }
82
83    if(!variator->variation.vars) /* the first time this function is called */
84    {
85        success = SDLVisualTest_InitVariation(&variator->variation,
86                                              &variator->config);
87        if(!success)
88        {
89            SDLTest_LogError("SDLVisualTest_InitVariation() failed");
90            return NULL;
91        }
92        success = SDLVisualTest_MakeStrFromVariation(&variator->variation,
93                  &variator->config, variator->buffer, MAX_SUT_ARGS_LEN);
94        if(!success)
95        {
96            SDLTest_LogError("SDLVisualTest_MakeStrFromVariation() failed");
97            return NULL;
98        }
99        return variator->buffer;
100    }
101    else
102    {
103        success = NextVariation(&variator->variation, &variator->config);
104        if(success == 1)
105        {
106            success = SDLVisualTest_MakeStrFromVariation(&variator->variation,
107                      &variator->config, variator->buffer, MAX_SUT_ARGS_LEN);
108            if(!success)
109            {
110                SDLTest_LogError("SDLVisualTest_MakeStrFromVariation() failed");
111                return NULL;
112            }
113            return variator->buffer;
114        }
115        else if(success == -1)
116            SDLTest_LogError("NextVariation() failed.");
117        return NULL;
118    }
119    return NULL;
120}
121
122void
123SDLVisualTest_FreeExhaustiveVariator(SDLVisualTest_ExhaustiveVariator* variator)
124{
125    if(!variator)
126    {
127        SDLTest_LogError("variator argument cannot be NULL");
128        return;
129    }
130    SDL_free(variator->variation.vars);
131    variator->variation.vars = NULL;
132}
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