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NAME

       ct - Main user interface for the Common Test framework.

DESCRIPTION

       Main user interface for the Common Test framework.

       This  module  implements the command-line interface for running tests and basic functions for Common Test
       case issues, such as configuration and logging.

       Test Suite Support Macros

       The config macro is defined in ct.hrl. This macro is to be used to retrieve information from  the  Config
       variable  sent  to  all  test  cases.  It  is  used  with  two  arguments;  the  first is the name of the
       configuration variable to retrieve, the second is the Config variable supplied to the test case.

       Possible configuration variables include:

         * data_dir - Data file directory

         * priv_dir - Scratch file directory

         * Whatever added by init_per_suite/1 or init_per_testcase/2 in the test suite.

DATA TYPES

         handle() = pid():

           The identity (handle) of a connection.

         target_name() = atom():

           A name and association to configuration data introduced through a require statement,  or  a  call  to
           ct:require/2, for example, ct:require(mynodename,{node,[telnet]}).

EXPORTS

       abort_current_testcase(Reason) -> ok | {error, ErrorReason}

              Types:

                 Reason = term()
                 ErrorReason = no_testcase_running | parallel_group

              Aborts  the  currently  executing  test case. The user must know with certainty which test case is
              currently executing. The function is therefore only safe to call from a  function  that  has  been
              called (or synchronously invoked) by the test case.

              Reason, the reason for aborting the test case, is printed in the test case log.

       add_config(Callback, Config) -> ok | {error, Reason}

              Types:

                 Callback = atom()
                 Config = string()
                 Reason = term()

              Loads  configuration  variables  using the specified callback module and configuration string. The
              callback module is to be either loaded or present in the code part. Loaded configuration variables
              can later be removed using function ct:remove_config/2.

       break(Comment) -> ok | {error, Reason}

              Types:

                 Comment = string()
                 Reason = {multiple_cases_running, TestCases} | 'enable break with release_shell option'
                 TestCases = [atom()]

              Cancels any active timetrap and pauses the execution of the current test case until the user calls
              function continue/0. The user can then interact with  the  Erlang  node  running  the  tests,  for
              example,  for  debugging purposes or for manually executing a part of the test case. If a parallel
              group is executing, ct:break/2 is to be called instead.

              A cancelled timetrap is not automatically  reactivated  after  the  break,  but  must  be  started
              exlicitly with ct:timetrap/1.

              In  order for the break/continue functionality to work, Common Test must release the shell process
              controlling stdin. This is done by setting start option release_shell to true.  For  details,  see
              section Running Tests from the Erlang Shell or from an Erlang Program in the User's Guide.

       break(TestCase, Comment) -> ok | {error, Reason}

              Types:

                 TestCase = atom()
                 Comment = string()
                 Reason = 'test case not running' | 'enable break with release_shell option'

              Works  the  same  way as ct:break/1, only argument TestCase makes it possible to pause a test case
              executing in a parallel group. Function ct:continue/1  is  to  be  used  to  resume  execution  of
              TestCase.

              For details, see ct:break/1.

       capture_get() -> ListOfStrings

              Types:

                 ListOfStrings = [string()]

              Equivalent to ct:capture_get([default]).

       capture_get(ExclCategories) -> ListOfStrings

              Types:

                 ExclCategories = [atom()]
                 ListOfStrings = [string()]

              Returns  and  purges  the  list  of  text  strings buffered during the latest session of capturing
              printouts to stdout. Log categories that are to be ignored in ListOfStrings can be specified  with
              ExclCategories. If ExclCategories = [], no filtering takes place.

              See also ct:capture_start/0, ct:capture_stop/0, ct:log/3.

       capture_start() -> ok

              Starts capturing all text strings printed to stdout during execution of the test case.

              See also ct:capture_get/1, ct:capture_stop/0.

       capture_stop() -> ok

              Stops capturing text strings (a session started with capture_start/0).

              See also ct:capture_get/1, ct:capture_start/0.

       comment(Comment) -> ok

              Types:

                 Comment = term()

              Prints the specified Comment in the comment field in the table on the test suite result page.

              If  called  several  times,  only  the  last  comment  is  printed.  The  test  case  return value
              {comment,Comment} overwrites the string set by this function.

       comment(Format, Args) -> ok

              Types:

                 Format = string()
                 Args = list()

              Prints the formatted string in the comment field in the table on the test suite result page.

              Arguments Format and Args are used in a call to io_lib:format/2 to create the comment string.  The
              behavior of comment/2 is otherwise the same as function ct:comment/1.

       continue() -> ok

              This function must be called to continue after a test case (not executing in a parallel group) has
              called function ct:break/1.

       continue(TestCase) -> ok

              Types:

                 TestCase = atom()

              This  function  must  be called to continue after a test case has called ct:break/2. If the paused
              test case, TestCase, executes in a parallel group, this function, rather than continue/0, must  be
              used to let the test case proceed.

       decrypt_config_file(EncryptFileName, TargetFileName) -> ok | {error, Reason}

              Types:

                 EncryptFileName = string()
                 TargetFileName = string()
                 Reason = term()

              Decrypts  EncryptFileName, previously generated with ct:encrypt_config_file/2,3. The original file
              contents is saved in the target file. The encryption key, a string, must be available  in  a  text
              file  named  .ct_config.crypt,  either in the current directory, or the home directory of the user
              (it is searched for in that order).

       decrypt_config_file(EncryptFileName, TargetFileName, KeyOrFile) -> ok | {error, Reason}

              Types:

                 EncryptFileName = string()
                 TargetFileName = string()
                 KeyOrFile = {key, string()} | {file, string()}
                 Reason = term()

              Decrypts EncryptFileName, previously generated with ct:encrypt_config_file/2,3. The original  file
              contents  is  saved  in  the  target  file.  The  key  must  have  the same value as that used for
              encryption.

       encrypt_config_file(SrcFileName, EncryptFileName) -> ok | {error, Reason}

              Types:

                 SrcFileName = string()
                 EncryptFileName = string()
                 Reason = term()

              Encrypts the source configuration file with DES3 and saves the result in file EncryptFileName. The
              key, a string, must be available in a text file named  .ct_config.crypt,  either  in  the  current
              directory, or the home directory of the user (it is searched for in that order).

              For  information  about  using  encrypted  configuration  files  when  running  tests, see section
              Encrypted Configuration Files in the User's Guide.

              For details on DES3 encryption/decryption, see application Crypto.

       encrypt_config_file(SrcFileName, EncryptFileName, KeyOrFile) -> ok | {error, Reason}

              Types:

                 SrcFileName = string()
                 EncryptFileName = string()
                 KeyOrFile = {key, string()} | {file, string()}
                 Reason = term()

              Encrypts the source configuration file  with  DES3  and  saves  the  result  in  the  target  file
              EncryptFileName. The encryption key to use is either the value in {key,Key} or the value stored in
              the file specified by {file,File}.

              For  information  about  using  encrypted  configuration  files  when  running  tests, see section
              Encrypted Configuration Files in the User's Guide.

              For details on DES3 encryption/decryption, see application Crypto.

       fail(Reason) -> ok

              Types:

                 Reason = term()

              Terminates a test case with the specified error Reason.

       fail(Format, Args) -> ok

              Types:

                 Format = string()
                 Args = list()

              Terminates a test case with an error message specified by a format string and  a  list  of  values
              (used as arguments to io_lib:format/2).

       get_config(Required) -> Value

              Equivalent to ct:get_config(Required, undefined, []).

       get_config(Required, Default) -> Value

              Equivalent to ct:get_config(Required, Default, []).

       get_config(Required, Default, Opts) -> ValueOrElement

              Types:

                 Required = KeyOrName | {KeyOrName, SubKey} | {KeyOrName, SubKey, SubKey}
                 KeyOrName = atom()
                 SubKey = atom()
                 Default = term()
                 Opts = [Opt] | []
                 Opt = element | all
                 ValueOrElement = term() | Default

              Reads configuration data values.

              Returns  the  matching values or configuration elements, given a configuration variable key or its
              associated name (if one has been specified with ct:require/2 or a require statement).

              Example:

              Given the following configuration file:

               {unix,[{telnet,IpAddr},
                      {user,[{username,Username},
                             {password,Password}]}]}.

              Then:

               ct:get_config(unix,Default) -> [{telnet,IpAddr},
                {user, [{username,Username}, {password,Password}]}]
               ct:get_config({unix,telnet},Default) -> IpAddr
               ct:get_config({unix,user,username},Default) -> Username
               ct:get_config({unix,ftp},Default) -> Default
               ct:get_config(unknownkey,Default) -> Default

              If a configuration variable key has been associated with a name  (by  ct:require/2  or  a  require
              statement), the name can be used instead of the key to read the value:

               ct:require(myuser,{unix,user}) -> ok.
               ct:get_config(myuser,Default) -> [{username,Username}, {password,Password}]

              If  a  configuration  variable is defined in multiple files, use option all to access all possible
              values. The values are returned in a list. The order of the elements corresponds to the order that
              the configuration files were specified at startup.

              If configuration elements (key-value tuples) are to be returned as result instead of  values,  use
              option element. The returned elements are then on the form {Required,Value}.

              See also ct:get_config/1, ct:get_config/2, ct:require/1, ct:require/2.

       get_event_mgr_ref() -> EvMgrRef

              Types:

                 EvMgrRef = atom()

              Gets  a reference to the Common Test event manager. The reference can be used to, for example, add
              a user-specific event handler while tests are running.

              Example:

               gen_event:add_handler(ct:get_event_mgr_ref(), my_ev_h, [])

       get_status() -> TestStatus | {error, Reason} | no_tests_running

              Types:

                 TestStatus = [StatusElem]
                 StatusElem = {current, TestCaseInfo} | {successful, Successful} | {failed, Failed} |  {skipped,
                 Skipped} | {total, Total}
                 TestCaseInfo = {Suite, TestCase} | [{Suite, TestCase}]
                 Suite = atom()
                 TestCase = atom()
                 Successful = integer()
                 Failed = integer()
                 Skipped = {UserSkipped, AutoSkipped}
                 UserSkipped = integer()
                 AutoSkipped = integer()
                 Total = integer()
                 Reason = term()

              Returns  status  of  ongoing test. The returned list contains information about which test case is
              executing (a list of cases when a parallel test case group is executing), as well as counters  for
              successful, failed, skipped, and total test cases so far.

       get_target_name(Handle) -> {ok, TargetName} | {error, Reason}

              Types:

                 Handle = handle()
                 TargetName = target_name()

              Returns the name of the target that the specified connection belongs to.

       get_testspec_terms() -> TestSpecTerms | undefined

              Types:

                 TestSpecTerms = [{Tag, Value}]
                 Value = [term()]

              Gets a list of all test specification terms used to configure and run this test.

       get_testspec_terms(Tags) -> TestSpecTerms | undefined

              Types:

                 Tags = [Tag] | Tag
                 Tag = atom()
                 TestSpecTerms = [{Tag, Value}] | {Tag, Value}
                 Value = [{Node, term()}] | [term()]
                 Node = atom()

              Reads  one  or  more terms from the test specification used to configure and run this test. Tag is
              any valid test specification tag, for example, label, config, or logdir. User-specific  terms  are
              also available to read if option allow_user_terms is set.

              All value tuples returned, except user terms, have the node name as first element.

              To read test terms, use Tag = tests (rather than suites, groups, or cases). Value is then the list
              of all tests on the form [{Node,Dir,[{TestSpec,GroupsAndCases1},...]},...], where GroupsAndCases =
              [{Group,[Case]}] | [Case].

       get_timetrap_info() -> {Time, Scale}

              Types:

                 Time = integer() | infinity
                 Scale = true | false

              Reads information about the timetrap set for the current test case. Scale indicates if Common Test
              will  attempt to compensate timetraps automatically for runtime delays introduced by, for example,
              tools like cover.

       install(Opts) -> ok | {error, Reason}

              Types:

                 Opts = [Opt]
                 Opt = {config, ConfigFiles} | {event_handler, Modules} | {decrypt, KeyOrFile}
                 ConfigFiles = [ConfigFile]
                 ConfigFile = string()
                 Modules = [atom()]
                 KeyOrFile = {key, Key} | {file, KeyFile}
                 Key = string()
                 KeyFile = string()

              Installs configuration files and event handlers.

              Run this function once before the first test.

              Example:

               install([{config,["config_node.ctc","config_user.ctc"]}])

              This function is automatically run by program ct_run.

       listenv(Telnet) -> [Env]

              Types:

                 Telnet = term()
                 Env = {Key, Value}
                 Key = string()
                 Value = string()

              Performs command listenv on the specified Telnet connection and returns the result as  a  list  of
              key-value pairs.

       log(Format) -> ok

              Equivalent to ct:log(default, 50, Format, [], []).

       log(X1, X2) -> ok

              Types:

                 X1 = Category | Importance | Format
                 X2 = Format | FormatArgs

              Equivalent to ct:log(Category, Importance, Format, FormatArgs, []).

       log(X1, X2, X3) -> ok

              Types:

                 X1 = Category | Importance
                 X2 = Importance | Format
                 X3 = Format | FormatArgs | Opts

              Equivalent to ct:log(Category, Importance, Format, FormatArgs, Opts).

       log(X1, X2, X3, X4) -> ok

              Types:

                 X1 = Category | Importance
                 X2 = Importance | Format
                 X3 = Format | FormatArgs
                 X4 = FormatArgs | Opts

              Equivalent to ct:log(Category, Importance, Format, FormatArgs, Opts).

       log(Category, Importance, Format, FormatArgs, Opts) -> ok

              Types:

                 Category = atom()
                 Importance = integer()
                 Format = string()
                 FormatArgs = list()
                 Opts = [Opt]
                 Opt = no_css | esc_chars

              Prints from a test case to the log file.

              This function is meant for printing a string directly from a test case to the test case log file.

              Default  Category  is  default,  default  Importance  is  ?STD_IMPORTANCE,  and  default value for
              FormatArgs is [].

              For details on Category, Importance and the no_css option, see section  Logging -  Categories  and
              Verbosity Levels in the User's Guide.

              Common  Test  will  not  escape special HTML characters (<, > and &) in the text printed with this
              function, unless the esc_chars option is used.

       make_priv_dir() -> ok | {error, Reason}

              Types:

                 Reason = term()

              If the test is started with option create_priv_dir set to manual_per_tc, in  order  for  the  test
              case to use the private directory, it must first create it by calling this function.

       notify(Name, Data) -> ok

              Types:

                 Name = atom()
                 Data = term()

              Sends  an  asynchronous  notification of type Name with Datato the Common Test event manager. This
              can later be caught by any installed event manager.

              See also stdlib:gen_event(3erl).

       pal(Format) -> ok

              Equivalent to ct:pal(default, 50, Format, []).

       pal(X1, X2) -> ok

              Types:

                 X1 = Category | Importance | Format
                 X2 = Format | FormatArgs

              Equivalent to ct:pal(Category, Importance, Format, FormatArgs).

       pal(X1, X2, X3) -> ok

              Types:

                 X1 = Category | Importance
                 X2 = Importance | Format
                 X3 = Format | FormatArgs

              Equivalent to ct:pal(Category, Importance, Format, FormatArgs).

       pal(Category, Importance, Format, FormatArgs) -> ok

              Types:

                 Category = atom()
                 Importance = integer()
                 Format = string()
                 FormatArgs = list()

              Prints and logs from a test case.

              This function is meant for printing a string from a test case, both to the test case log file  and
              to the console.

              Default  Category  is  default,  default  Importance  is  ?STD_IMPORTANCE,  and  default value for
              FormatArgs is [].

              For details on Category and Importance, see section Logging - Categories and Verbosity  Levels  in
              the User's Guide.

              Note  that  special  characters in the text (<, > and &) will be escaped by Common Test before the
              text is printed to the log file.

       parse_table(Data) -> {Heading, Table}

              Types:

                 Data = [string()]
                 Heading = tuple()
                 Table = [tuple()]

              Parses the printout from an SQL table and returns a list of tuples.

              The printout to parse is typically the result of a select command in SQL. The returned Table is  a
              list of tuples, where each tuple is a row in the table.

              Heading is a tuple of strings representing the headings of each column in the table.

       print(Format) -> ok

              Equivalent to ct:print(default, 50, Format, []).

       print(X1, X2) -> ok

              Types:

                 X1 = Category | Importance | Format
                 X2 = Format | FormatArgs

              Equivalent to ct:print(Category, Importance, Format, FormatArgs).

       print(X1, X2, X3) -> ok

              Types:

                 X1 = Category | Importance
                 X2 = Importance | Format
                 X3 = Format | FormatArgs

              Equivalent to ct:print(Category, Importance, Format, FormatArgs).

       print(Category, Importance, Format, FormatArgs) -> ok

              Types:

                 Category = atom()
                 Importance = integer()
                 Format = string()
                 FormatArgs = list()

              Prints from a test case to the console.

              This function is meant for printing a string from a test case to the console.

              Default  Category  is  default,  default  Importance  is  ?STD_IMPORTANCE,  and  default value for
              FormatArgs is [].

              For details on Category and Importance, see section Logging - Categories and Verbosity  Levels  in
              the User's Guide.

       reload_config(Required) -> ValueOrElement

              Types:

                 Required = KeyOrName | {KeyOrName, SubKey} | {KeyOrName, SubKey, SubKey}
                 KeyOrName = atom()
                 SubKey = atom()
                 ValueOrElement = term()

              Reloads configuration file containing specified configuration key.

              This  function  updates the configuration data from which the specified configuration variable was
              read, and returns the (possibly) new value of this variable.

              If some variables were present in the configuration, but are not loaded using this function,  they
              are removed from the configuration table together with their aliases.

       remove_config(Callback, Config) -> ok

              Types:

                 Callback = atom()
                 Config = string()
                 Reason = term()

              Removes  configuration  variables  (together  wih  their  aliases) that were loaded with specified
              callback module and configuration string.

       require(Required) -> ok | {error, Reason}

              Types:

                 Required = Key | {Key, SubKeys} | {Key, SubKey, SubKeys}
                 Key = atom()
                 SubKeys = SubKey | [SubKey]
                 SubKey = atom()

              Checks if the required configuration is available. Arbitrarily deep tuples  can  be  specified  as
              Required. Only the last element of the tuple can be a list of SubKeys.

              Example 1. Require the variable myvar:

               ok = ct:require(myvar).

              In this case the configuration file must at least contain:

               {myvar,Value}.

              Example 2. Require key myvar with subkeys sub1 and sub2:

               ok = ct:require({myvar,[sub1,sub2]}).

              In this case the configuration file must at least contain:

               {myvar,[{sub1,Value},{sub2,Value}]}.

              Example 3. Require key myvar with subkey sub1 with subsub1:

               ok = ct:require({myvar,sub1,sub2}).

              In this case the configuration file must at least contain:

               {myvar,[{sub1,[{sub2,Value}]}]}.

              See also ct:get_config/1, ct:get_config/2, ct:get_config/3, ct:require/2.

       require(Name, Required) -> ok | {error, Reason}

              Types:

                 Name = atom()
                 Required = Key | {Key, SubKey} | {Key, SubKey, SubKey}
                 SubKey = Key
                 Key = atom()

              Checks  if the required configuration is available and gives it a name. The semantics for Required
              is the same as in ct:require/1 except that a list of SubKeys cannot be specified.

              If the requested data is available, the subentry is associated with Name so that the value of  the
              element  can  be  read  with ct:get_config/1,2 provided Name is used instead of the whole Required
              term.

              Example:

              Require one node with a Telnet connection and an FTP connection. Name the node a:

               ok = ct:require(a,{machine,node}).

              All references to this node can then use the node name. For example, a file over  FTP  is  fetched
              like follows:

               ok = ct:ftp_get(a,RemoteFile,LocalFile).

              For this to work, the configuration file must at least contain:

               {machine,[{node,[{telnet,IpAddr},{ftp,IpAddr}]}]}.

          Note:
              The  behavior  of  this  function  changed  radically in Common Test 1.6.2. To keep some backwards
              compatability, it is still possible to do:
              ct:require(a,{node,[telnet,ftp]}).
              This associates the name a with the top-level node entry. For this to work, the configuration file
              must at least contain:
              {node,[{telnet,IpAddr},{ftp,IpAddr}]}.

              See also ct:get_config/1, ct:get_config/2, ct:get_config/3, ct:require/1.

       run(TestDirs) -> Result

              Types:

                 TestDirs = TestDir | [TestDir]

              Runs all test cases in all suites in the specified directories.

              See also ct:run/3.

       run(TestDir, Suite) -> Result

              Runs all test cases in the specified suite.

              See also ct:run/3.

       run(TestDir, Suite, Cases) -> Result

              Types:

                 TestDir = string()
                 Suite = atom()
                 Cases = atom() | [atom()]
                 Result = [TestResult] | {error, Reason}

              Runs the specified test cases.

              Requires that ct:install/1 has been run first.

              Suites (*_SUITE.erl) files must be stored in TestDir or TestDir/test. All suites are compiled when
              the test is run.

       run_test(Opts) -> Result

              Types:

                 Opts = [OptTuples]
                 OptTuples = {dir, TestDirs} | {suite, Suites} | {group, Groups} | {testcase,  Cases}  |  {spec,
                 TestSpecs}  |  {join_specs,  Bool}  |  {label,  Label}  |  {config,  CfgFiles}  |  {userconfig,
                 UserConfig} | {allow_user_terms, Bool} |  {logdir,  LogDir}  |  {silent_connections,  Conns}  |
                 {stylesheet,  CSSFile}  |  {cover,  CoverSpecFile}  |  {cover_stop,  Bool} | {step, StepOpts} |
                 {event_handler,   EventHandlers}   |   {include,   InclDirs}   |   {auto_compile,    Bool}    |
                 {abort_if_missing_suites,  Bool} | {create_priv_dir, CreatePrivDir} | {multiply_timetraps, M} |
                 {scale_timetraps, Bool} | {repeat, N} | {duration, DurTime} | {until, StopTime} |  {force_stop,
                 ForceStop}  |  {decrypt,  DecryptKeyOrFile}  |  {refresh_logs,  LogDir}  | {logopts, LogOpts} |
                 {verbosity, VLevels} | {basic_html, Bool} | {ct_hooks, CTHs} | {enable_builtin_hooks,  Bool}  |
                 {release_shell, Bool}
                 TestDirs = [string()] | string()
                 Suites = [string()] | [atom()] | string() | atom()
                 Cases = [atom()] | atom()
                 Groups = GroupNameOrPath | [GroupNameOrPath]
                 GroupNameOrPath = [atom()] | atom() | all
                 TestSpecs = [string()] | string()
                 Label = string() | atom()
                 CfgFiles = [string()] | string()
                 UserConfig = [{CallbackMod, CfgStrings}] | {CallbackMod, CfgStrings}
                 CallbackMod = atom()
                 CfgStrings = [string()] | string()
                 LogDir = string()
                 Conns = all | [atom()]
                 CSSFile = string()
                 CoverSpecFile = string()
                 StepOpts = [StepOpt] | []
                 StepOpt = config | keep_inactive
                 EventHandlers = EH | [EH]
                 EH = atom() | {atom(), InitArgs} | {[atom()], InitArgs}
                 InitArgs = [term()]
                 InclDirs = [string()] | string()
                 CreatePrivDir = auto_per_run | auto_per_tc | manual_per_tc
                 M = integer()
                 N = integer()
                 DurTime = string(HHMMSS)
                 StopTime = string(YYMoMoDDHHMMSS) | string(HHMMSS)
                 ForceStop = skip_rest | Bool
                 DecryptKeyOrFile = {key, DecryptKey} | {file, DecryptFile}
                 DecryptKey = string()
                 DecryptFile = string()
                 LogOpts = [LogOpt]
                 LogOpt = no_nl | no_src
                 VLevels = VLevel | [{Category, VLevel}]
                 VLevel = integer()
                 Category = atom()
                 CTHs = [CTHModule | {CTHModule, CTHInitArgs}]
                 CTHModule = atom()
                 CTHInitArgs = term()
                 Result = {Ok, Failed, {UserSkipped, AutoSkipped}} | TestRunnerPid | {error, Reason}
                 Ok = integer()
                 Failed = integer()
                 UserSkipped = integer()
                 AutoSkipped = integer()
                 TestRunnerPid = pid()
                 Reason = term()

              Runs  tests  as specified by the combination of options in Opts. The options are the same as those
              used with program ct_run, see Run Tests from Command Line in the ct_run manual page.

              Here a TestDir can be used to point out the path to a Suite. Option testcase corresponds to option
              -case in program ct_run. Configuration files specified in  Opts  are  installed  automatically  at
              startup.

              TestRunnerPid is returned if release_shell == true. For details, see ct:break/1.

              Reason indicates the type of error encountered.

       run_testspec(TestSpec) -> Result

              Types:

                 TestSpec = [term()]
                 Result = {Ok, Failed, {UserSkipped, AutoSkipped}} | {error, Reason}
                 Ok = integer()
                 Failed = integer()
                 UserSkipped = integer()
                 AutoSkipped = integer()
                 Reason = term()

              Runs a test specified by TestSpec. The same terms are used as in test specification files.

              Reason indicates the type of error encountered.

       sleep(Time) -> ok

              Types:

                 Time = {hours, Hours} | {minutes, Mins} | {seconds, Secs} | Millisecs | infinity
                 Hours = integer()
                 Mins = integer()
                 Secs = integer()
                 Millisecs = integer() | float()

              This  function,  similar  to timer:sleep/1 in STDLIB, suspends the test case for a specified time.
              However, this function also multiplies Time with the multiply_timetraps value (if set)  and  under
              certain  circumstances  also  scales  up  the time automatically if scale_timetraps is set to true
              (default is false).

       start_interactive() -> ok

              Starts Common Test in interactive mode.

              From this mode, all test case support functions can be executed directly from  the  Erlang  shell.
              The  interactive  mode  can  also  be started from the OS command line with ct_run -shell [-config
              File...].

              If any functions (for example, Telnet or FTP) using "required configuration data" are to be called
              from the Erlang shell, configuration data must first be required with ct:require/2.

              Example:

               > ct:require(unix_telnet, unix).
               ok
               > ct_telnet:open(unix_telnet).
               {ok,<0.105.0>}
               > ct_telnet:cmd(unix_telnet, "ls .").
               {ok,["ls","file1  ...",...]}

       step(TestDir, Suite, Case) -> Result

              Types:

                 Case = atom()

              Steps through a test case with the debugger.

              See also ct:run/3.

       step(TestDir, Suite, Case, Opts) -> Result

              Types:

                 Case = atom()
                 Opts = [Opt] | []
                 Opt = config | keep_inactive

              Steps through a test case with the debugger. If option config has been specifed,  breakpoints  are
              also set on the configuration functions in Suite.

              See also ct:run/3.

       stop_interactive() -> ok

              Exits the interactive mode.

              See also ct:start_interactive/0.

       sync_notify(Name, Data) -> ok

              Types:

                 Name = atom()
                 Data = term()

              Sends a synchronous notification of type Name with Data to the Common Test event manager. This can
              later be caught by any installed event manager.

              See also stdlib:gen_event(3erl).

       testcases(TestDir, Suite) -> Testcases | {error, Reason}

              Types:

                 TestDir = string()
                 Suite = atom()
                 Testcases = list()
                 Reason = term()

              Returns all test cases in the specified suite.

       timetrap(Time) -> ok

              Types:

                 Time = {hours, Hours} | {minutes, Mins} | {seconds, Secs} | Millisecs | infinity | Func
                 Hours = integer()
                 Mins = integer()
                 Secs = integer()
                 Millisecs = integer() | float()
                 Func = {M, F, A} | function()
                 M = atom()
                 F = atom()
                 A = list()

              Sets a new timetrap for the running test case.

              If  the  argument  is  Func,  the  timetrap is triggered when this function returns. Func can also
              return a new Time value, which in that case is the value for the new timetrap.

       userdata(TestDir, Suite) -> SuiteUserData | {error, Reason}

              Types:

                 TestDir = string()
                 Suite = atom()
                 SuiteUserData = [term()]
                 Reason = term()

              Returns any data specified with tag userdata in the list of tuples returned from suite/0.

       userdata(TestDir, Suite, Case::GroupOrCase) -> TCUserData | {error, Reason}

              Types:

                 TestDir = string()
                 Suite = atom()
                 GroupOrCase = {group, GroupName} | atom()
                 GroupName = atom()
                 TCUserData = [term()]
                 Reason = term()

              Returns  any  data  specified  with  tag  userdata  in  the   list   of   tuples   returned   from
              Suite:group(GroupName) or Suite:Case().

Ericsson AB                                     common_test 1.12                                        ct(3erl)