author Ozkan Sezer <>
Tue, 12 Jun 2018 14:00:15 +0300
changeset 12016 f3d8b8456e7b
parent 7924 fcb86d323770
permissions -rw-r--r--
ran 'chmod -x' on many files
     1 /*!
     3 \mainpage Visual and Interactive Test Automation for SDL 2.0
     5 \section license_sec License
     6 Check the file \c COPYING.txt for licensing information.
     8 \section intro_sec Introduction
     9 The goal of this GSoC project is to automate the testing of testsprite2.
    10 testsprite2 takes 26 parameters which have thousands of valid combinations and is
    11 used to validate SDL's window, mouse and rendering behaviour. By having a test
    12 harness that runs testsprite2 with various command line argument strings and
    13 validates the output for each run, we can make testing an easier task for
    14 maintainers, contributors and testers. The test harness can be used by a continuous
    15 integration system (like buildbot or jenkins) to validate SDL after checkins.
    17 SDL Homepage:
    19 \section build_sec Building
    21 \subsection build_linux Building on Linux/Cygwin
    22 <tt>./; ./configure; make;</tt>
    24 \subsection build_windows Building on Windows
    25 Use the Visual Studio solution under \c SDL/VisualC/visualtest.
    27 \section docs_sec Documentation
    28 Documentation is available via Doxygen. To build the documentation, cd to the
    29 SDL/visualtest/docs directory and run \c doxygen. A good starting point for
    30 exploring the documentation is \c SDL/visualtest/docs/html/index.html
    32 \section usage_sec Usage
    33 To see all the options supported by the test harness, just run \c testharness
    34 with no arguments.
    36 At the moment the following options are supported:
    37 \li \c sutapp - Path to the system under test (SUT) application
    38 \li \c sutargs - Launch the SUT with the specified arguments string
    39 \li \c timeout - The maximum time after which the SUT process will be killed;
    40 	passed as hh:mm:ss; default 00:01:00
    41 \li \c variator - Which variator to use; see \ref variators_sec
    42 \li \c num-variations - The number of variations to run for; taken to be 
    43 	1 for the random variator and ALL for the exhaustive variator by default
    44 \li \c no-launch - Just print the arguments string for each variation without
    45 	launching the SUT or performing any actions
    46 \li \c parameter-config - A config file that describes the command line parameters
    47 	supported by the SUT; see \ref paramconfig_sec or the sample *.parameters files
    48 	for more details
    49 \li \c action-config - A config file with a list of actions to be performed while
    50 	the SUT is running; see \ref actionconfig_sec or the sample *.actions files
    51 \li \c output-dir - Path to the directory where screenshots should be saved; is
    52 	created if it doesn't exist; taken to be "./output" by default
    53 \li \c verify-dir - Path to the directory with the verification images; taken to 
    54 	be "./verify" by default
    56 Paths can be relative or absolute.
    58 Alternatively, the options can be passed as a config file for convenience:
    60 <tt>testharness \-\-config testsprite2_sample.config</tt>
    62 For a sample, take a look at the *.config files in this repository.
    64 We can also pass a config file and override certain options as necessary:
    65 <tt>testharness \-\-config testsprite2_sample.config \-\-num-variations 10</tt>
    67 Note: You may find it convenient to copy the SUT executable along with any
    68 resources to the test harness directory. Also note that testsprite2 and its
    69 resources (icon.bmp) are automatically copied when using the Visual Studio
    70 solution.
    72 \subsection usageexamples_subsec Usage examples:
    74 Passing a custom arguments string:
    75 <tt>testharness \-\-sutapp testsprite2 \-\-sutargs "\-\-cyclecolor \-\-blend mod
    76 \-\-iterations 2" \-\-action-config xyz.actions</tt>
    78 Using the random variator:
    79 <tt>testharness \-\-sutapp testsprite2 \-\-variator random \-\-num-variations 5
    80 \-\-parameter-config xyz.parameters \-\-action-config xyz.actions</tt>
    82 \subsection config_subsec Config Files
    83 Config files are an alternate way to pass parameters to the test harness. We
    84 describe the paramters in a config file and pass that to the test harness using
    85 the \-\-config option. The config file consists of lines of the form "x=y" where
    86 x is an option and y is it's value. For boolean options, we simply give the name
    87 of the option to indicate that it is to be passed to the testharness.
    89 The hash '#' character can be used to start a comment from that point to the end
    90 of the line.
    92 \section paramconfig_sec The SUT Parameters File
    93 To generate variations we need to describe the parameters the will be passed to
    94 the SUT. This description is given in a parameters file. Each line of the parameters
    95 file (except the blank lines) represents one command line option with five
    96 comma separated fields:
    97 <tt>name, type, values, required, categories</tt>
    99 \li \c name is the name of the option, e.g., \c \-\-cyclecolor.
   100 \li \c type can have one of three values - integer, boolean and enum.
   101 \li \c values - for integer options this is the valid range of values the option
   102 	can take, i.e., [min max]. For enum options this is a list of strings that
   103 	the option can take, e.g., [val1 val2 val3]. For boolean options this field
   104 	is ignored.
   105 \li \c required - true if the option is required, false otherwise.
   106 \li \c categories - a list of categories that the option belongs to. For example,
   107 	[video mouse audio]
   109 Just like with config files, hash characters can be used to start comments.
   111 \subsection additionalnotes_subsec Additional Notes
   113 \li If you want to have an option that always takes a certain value, use an enum
   114 	with only one value.
   115 \li Currently there isn't any way to turn an option off, i.e., all options will
   116 	be included in the command line options string that is generated using the
   117 	config. If you don't want an option to be passed to the SUT, remove it from
   118 	the config file or comment it out.
   120 \section variators_sec Variators
   121 Variators are the mechanism by which we generate strings of command line arguments
   122 to test the SUT with. A variator is quite simply an iterator that iterates through
   123 different variations of command line options. There are two variators supported at
   124 the moment:
   125 \li \b Exhaustive - Generate all possible combinations of command line arguments
   126 	that are valid.
   127 \li \b Random - Generate a random variation each time the variator is called.
   129 As an example, let's try a simple .parameters file:\n
   130 <tt>
   131 \-\-blend, enum, [add mod], false, [] \n
   132 \-\-fullscreen, boolean, [], false, []
   133 </tt>
   135 The exhaustive variator would generate the following four variations:\n
   136 <tt>
   137 \-\-blend add \n
   138 \-\-blend mod \n
   139 \-\-blend add \-\-fullscreen \n
   140 \-\-blend mod \-\-fullscreen \n
   141 </tt>
   143 The random variator would simply generate a random variation like the following:\n
   144 <tt>\-\-blend mod</tt>
   146 \section actionconfig_sec The Actions File
   147 Once the SUT process has been launched, automated testing happens using a mechanism
   148 called actions. A list of actions is read from a file and each action is performed
   149 on the SUT process sequentially. Each line in the actions file describes an action.
   150 The format for an action is <tt>hh:mm:ss ACTION_NAME additional parameters</tt>.
   151 There are five actions supported at the moment:
   152 \li \b SCREENSHOT - Takes a screenshot of each window owned by the SUT process. The
   153 	images are saved as \c [hash]_[i].bmp where \c [hash] is the 32 character long
   154 	hexadecimal MD5 hash of the arguments string that was passed to the SUT while
   155 	launching it and \c i is the window number. i = 1 is an exceptional case
   156 	where the \c _[i] is dropped and the filename is simply \c [hash].bmp\n
   157 	Note: The screenshots are only of the window's client area.
   158 \li \b VERIFY - Verifies the screenshots taken by the last SCREENSHOT action by
   159 	comparing them against a verification image. Each \c [hash]_i.bmp image output
   160 	by the SCREENSHOT action is compared against a \c [hash].bmp image in the
   161 	verify-dir.
   162 \li \b QUIT - Gracefully quits the SUT process. On Windows this means sending a
   163 	WM_CLOSE message to each window owned by the SUT process. On Linux it means
   164 	sending a SIGQUIT signal to the SUT process.
   165 \li \b KILL - Forcefully kills the SUT process. This is useful when the SUT process
   166 	doesn't respond to the QUIT action.
   167 \li <b>LAUNCH [/path/to/executable] [args]</b> - Runs an executable with \c [args]
   168 	as the arguments string.
   170 Just like with config files, hash characters can be used to start comments.
   172 \section contint_sec Continuous Integration (CI)
   173 One of the goals of the project was to create a test harness that integrates
   174 with CI systems to provide automated visual and interactive testing to SDL.
   176 At the moment the test harness can be run in two modes that are useful for CI:
   177 \li Crash testing mode - launch the SUT with every variation and all parameters,
   178 	report to the CI if there's a crash
   179 \li Visual testing mode - launch and visually verify the SUT for a smaller subset
   180 	of the parameters
   182 Look at the for an example scripts that run the
   183 test harness for all variations with all parameters and report an error on a crash.
   184 The script uses the testsprite2_crashtest config, so remember to copy those files
   185 over to the test harness executable directory along with the script.
   187 \section todo_sec TODOs
   188 \li Allow specifying a clipping box along with the VERIFY action, i.e., hh:mm:ss
   189 	VERIFY x, y, w, h
   190 \li Add support for spaces between the equals sign in test harness config files
   191 \li Implement the SCREENSHOT action on Linux
   192 \li Add a pairwise variator
   193 \li Add actions to inject keyboard/mouse events
   194 \li Add actions to manipulate the SUT window, e.g., minimize, restore, resize
   195 \li Add support to load and save screenshots as .pngs instead of .bmps
   197 \section issues_sec Known Issues
   198 \li The QUIT action does not work on a testsprite2 process with multiple windows.
   199 	This appears to be an issue with testsprite2.
   200 \li The SCREENSHOT action doesn't capture the testsprite2 window correctly if the
   201 	--fullscreen option is supplied. It works with --fullscreen-desktop, however.
   203 \section moreinfo_sec More Information
   205 Author Contact Info:\n
   206 Apoorv Upreti \c \<\>
   208 Other useful links:
   209 - Project Repository:
   210 - Project Wiki:
   211 - Project Blog:
   212 - Verification images for testsprite2_blendmodes:
   213 - Verification images for testsprite2_geometry:
   214 */