Output files

Several output files are created when tests are executed, and all of them are somehow related to test results. This section discusses what outputs are created, how to configure where they are created, and how to fine-tune their contents.

Different output files

This section explains what different output files can be created and how to configure where they are created. Output files are configured using command line options, which get the path to the output file in question as an argument. A special value NONE (case-insensitive) can be used to disable creating a certain output file.

Output directory

All output files can be set using an absolute path, in which case they are created to the specified place, but in other cases, the path is considered relative to the output directory. The default output directory is the directory where the execution is started from, but it can be altered with the --outputdir (-d) option. The path set with this option is, again, relative to the execution directory, but can naturally be given also as an absolute path. Regardless of how a path to an individual output file is obtained, its parent directory is created automatically, if it does not exist already.

Output file

Output files contain all execution results in machine readable XML or JSON format. Log, report and xUnit files are typically generated based on them, and they can also be combined and otherwise post-processed with Rebot. Various external tools also process output files to be able to show detailed execution information.

Tip

Generating report and xUnit files as part of test execution does not require processing output files after execution. Disabling log generation when running tests can thus save memory.

The command line option --output (-o) determines the path where the output file is created. The path is relative to the output directory and the default value is output.xml when executing tests. When post-processing outputs with Rebot, new output files are not created unless the --output option is explicitly used.

It is possible to disable the output file by using a special value NONE with the --output option. If no outputs are needed, they should all be explicitly disabled using --output NONE --report NONE --log NONE.

XML output format

Output files are created using XML by default. The XML output format is documented in the result.xsd schema file.

JSON output format

Robot Framework supports also JSON outputs and this format is used automatically if the output file extension is .json. The JSON output format is documented in the result.json schema file.

Note

JSON output files are supported during execution starting from Robot Framework 7.2. Rebot can create them based on XML output files already with Robot Framework 7.0.

Legacy XML format

There were some backwards incompatible changes to the XML output file format in Robot Framework 7.0. To make it possible to use new Robot Framework versions with external tools that are not yet updated to support the new format, there is a --legacyoutput option that produces output files that are compatible with Robot Framework 6.x and earlier. Robot Framework itself can process output files both in the old and in the new formats.

We hope that external tools are updated soon, but we plan to support this option at least until Robot Framework 8.0. If you encounter tools that are not compatible, please inform the tool developers about changes.

Log file

Log files contain details about the executed test cases in HTML format. They have a hierarchical structure showing test suite, test case and keyword details. Log files are needed nearly every time when test results are to be investigated in detail. Even though log files also have statistics, reports are better for getting an higher-level overview.

The command line option --log (-l) determines where log files are created. Unless the special value NONE is used, log files are always created and their default name is log.html.

An example of beginning of a log file

An example of a log file with keyword details visible

An example of a log file with skipped and passed tests

Report file

Report files contain an overview of the test execution results in HTML format. They have statistics based on tags and executed test suites, as well as a list of all executed test cases. When both reports and logs are generated, the report has links to the log file for easy navigation to more detailed information. It is easy to see the overall test execution status from report, because its background color is green, if all tests pass and bright red if any test fails. Background can also be yellow, which means that all tests were skipped.

The command line option --report (-r) determines where report files are created. Similarly as log files, reports are always created unless NONE is used as a value, and their default name is report.html.

An example report file of successful test execution

An example report file of failed test execution

XUnit compatible result file

XUnit result files contain the test execution summary in xUnit compatible XML format. These files can thus be used as an input for external tools that understand xUnit reports. For example, Jenkins continuous integration server supports generating statistics based on xUnit compatible results.

Tip

Jenkins also has a separate Robot Framework plugin.

XUnit output files are not created unless the command line option --xunit (-x) is used explicitly. This option requires a path to the generated xUnit file, relatively to the output directory, as a value.

XUnit output files were changed pretty heavily in Robot Framework 5.0. They nowadays contain separate <testsuite> elements for each suite, <testsuite> elements have timestamp attribute, and suite documentation and metadata is stored as <property> elements.

Debug file

Debug files are plain text files that are written during the test execution. All messages got from test libraries are written to them, as well as information about started and ended test suites, test cases and keywords. Debug files can be used for monitoring the test execution. This can be done using, for example, a separate fileviewer.py tool, or in UNIX-like systems, simply with the tail -f command.

Debug files are not created unless the command line option --debugfile (-b) is used explicitly.

Timestamping output files

All output files generated by Robot Framework itself can be automatically timestamped with the option --timestampoutputs (-T). When this option is used, a timestamp in the format YYYYMMDD-hhmmss is placed between the extension and the base name of each file. The example below would, for example, create output files like output-20080604-163225.xml and mylog-20080604-163225.html:

robot --timestampoutputs --log mylog.html --report NONE tests.robot

Setting titles

The default titles for logs and reports are generated by prefixing the name of the top-level test suite with Test Log or Test Report. Custom titles can be given from the command line using the options --logtitle and --reporttitle, respectively.

Example:

robot --logtitle "Smoke Test Log" --reporttitle "Smoke Test Report" --include smoke my_tests/

Note

Prior to Robot Framework 3.1, underscores in the given titles were converted to spaces. Nowadays spaces need to be escaped or quoted like in the example above.

Setting background colors

By default the report file has red background if there are failures, green background if there are passed tests and possibly some skipped ones, and a yellow background if all tests are skipped or no tests have been run. These colors can be customized by using the --reportbackground command line option, which takes two or three colors separated with a colon as an argument:

--reportbackground blue:red
--reportbackground blue:red:orange
--reportbackground #00E:#E00

If you specify two colors, the first one will be used instead of the default green (pass) color and the second instead of the default red (fail). This allows, for example, using blue instead of green to make backgrounds easier to separate for color blind people.

If you specify three colors, the first two have same semantics as earlier and the last one replaces the default yellow (skip) color.

The specified colors are used as a value for the body element's background CSS property. The value is used as-is and can be a HTML color name (e.g. red), a hexadecimal value (e.g. #f00 or #ff0000), or an RGB value (e.g. rgb(255,0,0)). The default green, red and yellow colors are specified using hexadecimal values #9e9, #f66 and #fed84f, respectively.

Log levels

Available log levels

Messages in log files can have different log levels. Some of the messages are written by Robot Framework itself, but also executed keywords can log information using different levels. The available log levels are:

FAIL

Used when a keyword fails. Can be used only by Robot Framework itself.

ERROR

Used for displaying errors. Errors are shown in the console and in the Test Execution Errors section in log files, but they do not affect test case statuses. If the --exitonerror option is enabled, errors stop the whole execution, though,

WARN

Used for displaying warnings. Warnings are shown in the console and in the Test Execution Errors section in log files, but they do not affect test case statuses.

INFO

The default level for normal messages. By default, messages below this level are not shown in the log file.

DEBUG

Used for debugging purposes. Useful, for example, for logging what libraries are doing internally. When a keyword fails, a traceback showing where in the code the failure occurred is logged using this level automatically.

TRACE

More detailed debugging level. The keyword arguments and return values are automatically logged using this level.

Setting log level

By default, log messages below the INFO level are not logged, but this threshold can be changed from the command line using the --loglevel (-L) option. This option takes any of the available log levels as an argument, and that level becomes the new threshold level. A special value NONE can also be used to disable logging altogether.

It is possible to use the --loglevel option also when post-processing outputs with Rebot. This allows, for example, running tests initially with the TRACE level, and generating smaller log files for normal viewing later with the INFO level. By default all the messages included during execution will be included also with Rebot. Messages ignored during the execution cannot be recovered.

Another possibility to change the log level is using the BuiltIn keyword Set Log Level in the test data. It takes the same arguments as the --loglevel option, and it also returns the old level so that it can be restored later, for example, in a test teardown.

Visible log level

If the log file contains messages at DEBUG or TRACE levels, a visible log level drop down is shown in the upper right corner. This allows users to remove messages below chosen level from the view. This can be useful especially when running test at TRACE level.

An example log showing the visible log level drop down

By default the drop down will be set at the lowest level in the log file, so that all messages are shown. The default visible log level can be changed using --loglevel option by giving the default after the normal log level separated by a colon:

--loglevel DEBUG:INFO

In the above example, tests are run using level DEBUG, but the default visible level in the log file is INFO.

Splitting logs

Normally the log file is just a single HTML file. When the amount of the test cases increases, the size of the file can grow so large that opening it into a browser is inconvenient or even impossible. Hence, it is possible to use the --splitlog option to split parts of the log into external files that are loaded transparently into the browser when needed.

The main benefit of splitting logs is that individual log parts are so small that opening and browsing the log file is possible even if the amount of the test data is very large. A small drawback is that the overall size taken by the log file increases.

Technically the test data related to each test case is saved into a JavaScript file in the same folder as the main log file. These files have names such as log-42.js where log is the base name of the main log file and 42 is an incremented index.

The JavaScript files are saved to the same directory where the log file itself is saved. It is the common output directory by default, but it can be changed with the --log command line option.

Note

When copying the log files, you need to copy also all the log-*.js files or some information will be missing.

Configuring statistics

There are several command line options that can be used to configure and adjust the contents of the Statistics by Tag, Statistics by Suite and Test Details by Tag tables in different output files. All these options work both when executing test cases and when post-processing outputs.

Configuring displayed suite statistics

When a deeper suite structure is executed, showing all the test suite levels in the Statistics by Suite table may make the table somewhat difficult to read. By default all suites are shown, but you can control this with the command line option --suitestatlevel which takes the level of suites to show as an argument:

--suitestatlevel 3

Including and excluding tag statistics

When many tags are used, the Statistics by Tag table can become quite congested. If this happens, the command line options --tagstatinclude and --tagstatexclude can be used to select which tags to display, similarly as --include and --exclude are used to select test cases:

--tagstatinclude some-tag --tagstatinclude another-tag
--tagstatexclude owner-*
--tagstatinclude prefix-* --tagstatexclude prefix-13

Generating combined tag statistics

The command line option --tagstatcombine can be used to generate aggregate tags that combine statistics from multiple tags. The combined tags are specified using tag patterns where * and ? are supported as wildcards and AND, OR and NOT operators can be used for combining individual tags or patterns together.

The following examples illustrate creating combined tag statistics using different patterns, and the figure below shows a snippet of the resulting Statistics by Tag table:

--tagstatcombine owner-*
--tagstatcombine smokeANDmytag
--tagstatcombine smokeNOTowner-janne*

Examples of combined tag statistics

As the above example illustrates, the name of the added combined statistic is, by default, just the given pattern. If this is not good enough, it is possible to give a custom name after the pattern by separating them with a colon (:):

--tagstatcombine "prio1ORprio2:High priority tests"

Note

Prior to Robot Framework 3.1, underscores in the custom name were converted to spaces. Nowadays spaces need to be escaped or quoted like in the example above.

Creating links from tag names

You can add external links to the Statistics by Tag table by using the command line option --tagstatlink. Arguments to this option are given in the format tag:link:name, where tag specifies the tags to assign the link to, link is the link to be created, and name is the name to give to the link.

tag may be a single tag, but more commonly a simple pattern where * matches anything and ? matches any single character. When tag is a pattern, the matches to wildcards may be used in link and title with the syntax %N, where "N" is the index of the match starting from 1.

The following examples illustrate the usage of this option, and the figure below shows a snippet of the resulting Statistics by Tag table when example test data is executed with these options:

--tagstatlink mytag:http://www.google.com:Google
--tagstatlink example-bug-*:http://example.com
--tagstatlink owner-*:mailto:%1@domain.com?subject=Acceptance_Tests:Send_Mail

Examples of links from tag names

Adding documentation to tags

Tags can be given a documentation with the command line option --tagdoc, which takes an argument in the format tag:doc. tag is the name of the tag to assign the documentation to, and it can also be a simple pattern matching multiple tags. doc is the assigned documentation.

The given documentation is shown with matching tags in the Test Details by Tag table, and as a tool tip for these tags in the Statistics by Tag table. If one tag gets multiple documentations, they are combined together and separated with an ampersand.

Examples:

--tagdoc mytag:Example
--tagdoc "regression:See http://example.com/info.html"
--tagdoc "owner-*:Original author"

Note

Prior to Robot Framework 3.1, underscores in the documentation were converted to spaces. Nowadays spaces need to be escaped or quoted like in the examples above.

Removing and flattening keywords

Most of the content of output files comes from keywords and their log messages. When creating higher level reports, log files are not necessarily needed at all, and in that case keywords and their messages just take space unnecessarily. Log files themselves can also grow overly large, especially if they contain FOR loops or other constructs that repeat certain keywords multiple times.

In these situations, command line options --removekeywords and --flattenkeywords can be used to dispose or flatten unnecessary keywords. They can be used both when executing test cases and when post-processing outputs. When used during execution, they only affect the log file, not the XML output file. With rebot they affect both logs and possibly generated new output XML files.

Removing keywords

The --removekeywords option removes keywords and their messages altogether. It has the following modes of operation, and it can be used multiple times to enable multiple modes. Keywords that contain errors or warnings are not removed except when using the ALL mode.

ALL

Remove data from all keywords unconditionally.

PASSED

Remove keyword data from passed test cases. In most cases, log files created using this option contain enough information to investigate possible failures.

FOR

Remove all passed iterations from FOR loops except the last one.

WHILE

Remove all passed iterations from WHILE loops except the last one.

WUKS

Remove all failing keywords inside BuiltIn keyword Wait Until Keyword Succeeds except the last one.

NAME:<pattern>

Remove data from all keywords matching the given pattern regardless the keyword status. The pattern is matched against the full name of the keyword, prefixed with the possible library or resource file name like MyLibrary.Keyword Name. The pattern is case, space, and underscore insensitive, and it supports simple patterns with *, ? and [] as wildcards.

TAG:<pattern>

Remove data from keywords with tags that match the given pattern. Tags are case and space insensitive and they can be specified using tag patterns where *, ? and [] are supported as wildcards and AND, OR and NOT operators can be used for combining individual tags or patterns together. Can be used both with library keyword tags and user keyword tags.

Examples:

rebot --removekeywords all --output removed.xml output.xml
robot --removekeywords passed --removekeywords for tests.robot
robot --removekeywords name:HugeKeyword --removekeywords name:resource.* tests.robot
robot --removekeywords tag:huge tests.robot

Removing keywords is done after parsing the output file and generating an internal model based on it. Thus it does not reduce memory usage as much as flattening keywords.

Flattening keywords

The --flattenkeywords option flattens matching keywords. In practice this means that matching keywords get all log messages from their child keywords, recursively, and child keywords are discarded otherwise. Flattening supports the following modes:

FOR

Flatten FOR loops fully.

WHILE

Flatten WHILE loops fully.

ITERATION

Flatten individual FOR and WHILE loop iterations.

FORITEM

Deprecated alias for ITERATION.

NAME:<pattern>

Flatten keywords matching the given pattern. Pattern matching rules are same as when removing keywords using the NAME:<pattern> mode.

TAG:<pattern>

Flatten keywords with tags matching the given pattern. Pattern matching rules are same as when removing keywords using the TAG:<pattern> mode.

Examples:

robot --flattenkeywords name:HugeKeyword --flattenkeywords name:resource.* tests.robot
rebot --flattenkeywords foritem --output flattened.xml original.xml

Flattening keywords is done already when the output file is parsed initially. This can save a significant amount of memory especially with deeply nested keyword structures.

Flattening keyword during execution time

Starting from Robot Framework 6.1, it is possible to enable the keyword flattening during the execution time. This can be done only on an user keyword level by defining the reserved tag robot:flatten as a keyword tag. Using this tag will work similarly as the command line option described in the previous chapter, e.g. all content except for log messages is removed from under the keyword having the tag. One important difference is that in this case, the removed content is not written to the output file at all, and thus cannot be accessed at later time.

*** Keywords ***
Example
    [Tags]    robot:flatten
    Log    Keywords and the loop are removed, but logged messages are preserved.
    FOR     ${i}     IN RANGE     1    101
         Log    Iteration ${i}/100.
    END

Automatically expanding keywords

Keywords that have passed are closed in the log file by default. Thus information they contain is not visible unless you expand them. If certain keywords have important information that should be visible when the log file is opened, you can use the --expandkeywords option to set keywords automatically expanded in log file similar to failed keywords. Expanding supports the following modes:

NAME:<pattern>

Expand keywords matching the given pattern. Pattern matching rules are same as when removing keywords using the NAME:<pattern> mode.

TAG:<pattern>

Expand keywords with tags matching the given pattern. Pattern matching rules are same as when removing keywords using the TAG:<pattern> mode.

If you need to expand keywords matching different names or patterns, you can use the --expandkeywords multiple times.

Examples:

robot --expandkeywords name:SeleniumLibrary.CapturePageScreenshot tests.robot
rebot --expandkeywords tag:example --expandkeywords tag:another output.xml

Note

The --expandkeywords option is new in Robot Framework 3.2.

Setting start and end time of execution

When combining outputs using Rebot, it is possible to set the start and end time of the combined test suite using the options --starttime and --endtime, respectively. This is convenient, because by default, combined suites do not have these values. When both the start and end time are given, the elapsed time is also calculated based on them. Otherwise the elapsed time is got by adding the elapsed times of the child test suites together.

It is also possible to use the above mentioned options to set start and end times for a single suite when using Rebot. Using these options with a single output always affects the elapsed time of the suite.

Times must be given as timestamps in the format YYYY-MM-DD hh:mm:ss.mil, where all separators are optional and the parts from milliseconds to hours can be omitted. For example, 2008-06-11 17:59:20.495 is equivalent both to 20080611-175920.495 and 20080611175920495, and also mere 20080611 would work.

Examples:

rebot --starttime 20080611-17:59:20.495 output1.xml output2.xml
rebot --starttime 20080611-175920 --endtime 20080611-180242 *.xml
rebot --starttime 20110302-1317 --endtime 20110302-11418 myoutput.xml

Limiting error message length in reports

If a test case fails and has a long error message, the message shown in reports is automatically cut from the middle to keep reports easier to read. By default messages longer than 40 lines are cut, but that can be configured by using the --maxerrorlines command line option. The minimum value for this option is 10, and it is also possible to use a special value NONE to show the full message.

Full error messages are always visible in log files as messages of the failed keywords.

Note

The --maxerrorlines option is new in Robot Framework 3.1.

Programmatic modification of results

If the provided built-in features to modify results are not enough, Robot Framework makes it possible to do custom modifications programmatically. This is accomplished by creating a model modifier and activating it using the --prerebotmodifier option.

This functionality works nearly exactly like programmatic modification of test data that can be enabled with the --prerunmodifier option. The obvious difference is that this time modifiers operate with the result model, not the running model. For example, the following modifier marks all passed tests that have taken more time than allowed as failed:

from robot.api import SuiteVisitor

class ExecutionTimeChecker(SuiteVisitor):

    def __init__(self, max_seconds: float):
        self.max_milliseconds = max_seconds * 1000

    def visit_test(self, test):
        if test.status == 'PASS' and test.elapsedtime > self.max_milliseconds:
            test.status = 'FAIL'
            test.message = 'Test execution took too long.'

If the above modifier would be in file ExecutionTimeChecker.py, it could be used, for example, like this:

# Specify modifier as a path when running tests. Maximum time is 42 seconds.
robot --prerebotmodifier path/to/ExecutionTimeChecker.py:42 tests.robot

# Specify modifier as a name when using Rebot. Maximum time is 3.14 seconds.
# ExecutionTimeChecker.py must be in the module search path.
rebot --prerebotmodifier ExecutionTimeChecker:3.14 output.xml

If more than one model modifier is needed, they can be specified by using the --prerebotmodifier option multiple times. When executing tests, it is possible to use --prerunmodifier and --prerebotmodifier options together.

System log

Robot Framework has its own plain-text system log where it writes information about

• Processed and skipped test data files
• Imported test libraries, resource files and variable files
• Executed test suites and test cases
• Created outputs

Normally users never need this information, but it can be useful when investigating problems with test libraries or Robot Framework itself. A system log is not created by default, but it can be enabled by setting the environment variable ROBOT_SYSLOG_FILE so that it contains a path to the selected file.

A system log has the same log levels as a normal log file, with the exception that instead of FAIL it has the ERROR level. The threshold level to use can be altered using the ROBOT_SYSLOG_LEVEL environment variable like shown in the example below. Possible unexpected errors and warnings are written into the system log in addition to the console and the normal log file.

#!/bin/bash

export ROBOT_SYSLOG_FILE=/tmp/syslog.txt
export ROBOT_SYSLOG_LEVEL=DEBUG

robot --name Syslog_example path/to/tests