Derby Functional Tests

Package: org.apache.derbyTesting

1. Introduction

This document describes functionality of the derby functional testing package org.apache.derbyTesting. This package is based on the functional tests in use at IBM for testing the Cloudscape product before its contribution to ASF.

In the following, instructions are geared towards a unix environment. For other environments, some details may need to be adjusted. For instance, the document may refer to $ANT_HOME, for DOS, this would be %ANT_HOME%.

In the following the top directory under which the subversion tree is placed is referred to as ${derby.source} - see also the derby BUILDING.txt.

The version of the classes and supporting files of the derbyTesting package have to match the version of the classes of the derby package. Thus you either need to build all jars yourself, or get all jar files from the Derby site at the same time when available.

2. QuickStart

2.1 running tests

The derbyTesting package enables you to run 1 test or a suite of tests. Before you can run, you need to setup your environment:

    jdk131 - Sun HotSpot jdk1.3.1
    jdk141 - Sun HotSpot jdk1.4.1
    jdk142 - Sun HotSpot jdk1.4.2
    jdk15 - Sun HotSpot jdk1.5
    jdk16 - Sun HotSpot jdk1.6
    ibm131 - IBM Classic jdk1.3.1
    ibm141 - IBM Classic jdk1.4.1
    ibm142 - IBM Classic jdk1.4.2
    ibm15 - IBM Classic jdk1.5
    j9_13 - WCTME jvm (available with IBM Websphere Studio Device Developer, 5.6), version 2.1
    j9_22 - WCTME jvm (available with IBM Websphere Client Technology Micro Edition, 5.7), version 2.2
    j9_foundation - WCTME jvm (available with IBM Websphere Client Technology Micro Edition, 5.7), version 2.2, foundation library

For example:

(note that $jardir is only a convenience variable and that the set CLASSPATH command below has carriage returns for formatting reasons):
set jardir=/local/derbyjar
set CLASSPATH="$jardir/derby.jar:$jardir/derbytools.jar:$jardir/derbyrun.jar:$jardir/derbynet.jar:$jardir/derbyclient.jar:

set PATH=/local/jdk141/bin:$PATH

To run 1 test:

    java -D<testproperty> org.apache.derbyTesting.functionTests.harness.RunTest <testdir>/<testname>

  •    <testproperty> are test specific properties, such as 'framework' for the RunTest class.

  •    <testdir> is one of the directories under functionTests/tests where the actual test is located

  •    <testname> is the actual name of the test

to run the test supersimple against the embedded driver:
      java org.apache.derbyTesting.functionTests.harness.RunTest lang/supersimple.sql

To run a test with network server, using the derbyclient driver, add -Dframework=DerbyNetClient to the run. The test harness will to start network server at port 1527 or connect to a running one, run the test, and stop network server thereafter.
for example:
        java -Dframework=DerbyNetClient org.apache.derbyTesting.functionTests.harness.RunTest lang/supersimple.sql

A successful run will have a .pass file, and the output to the console will show no difference between expected and actual test result. A failed test run will have at least a .fail file and the output to the console will show the difference between expected and actual result.

To run a suite:

  java -D<testproperty> org.apache.derbyTesting.functionTests.harness.RunSuite  <testsuite>

  •    <testproperty> are test specific properties, such as 'verbose' for the RunSuite class.

  •    <testsuite> is one of the suites under org/apache/derbyTesting/suites

for example for running  the suite derbylang:
   java -Dverbose=true org.apache.derbyTesting.functionTests.harness.RunSuite derbylang

Each suite run should be started in a clean directory. The test output directory will not be emptied out before testing is begun, although individual test files and result files will be cleaned out and overwritten. 

To run a suite with J2ME/CDC/Foundation:

(note that the command below has carriage returns for formatting reasons):
  <java> -Xbootclasspath/a:$jardir/<jdbc_jar> -Dbootcp=$jardir/<jdbc_jar>
org.apache.derbyTesting.functionTests.harness.RunSuite  <testsuite>


  •    <java> is the jvm with any jvm flags. For testing with CDC/Foundation Profile using j9 jvm from IBM, this will be 'j9 -jcl:foun10'.

  •    <jdbc_jar> is the jar file which implements the JDBC API for CDC/Foundation Profile (JSR169).

  •    <testsuite> is one of the suites under org/apache/derbyTesting/suites

for example for running  the suite derbyall:
   j9 -jcl:foun10 -Xbootclasspath/a:$jardir/jdbc.jar -Dbootcp=$jardir/jdbc.jar
org.apache.derbyTesting.functionTests.harness.RunSuite derbyall

The suites provided are:

A successful run with all tests passing will have no *.fail files created, the <testsuite>_fail.txt file will be empty, and the <testsuite>_report.txt file will show no failures in the Summary results section.

-------snippet from derbylang_report.txt -----
Summary results:

Test Run Started: 2004-11-10 11:27:55.0
Test Run Duration: 00:04:09

129 Tests Run
100% Pass (129 tests passed)
 0% Fail (0 tests failed)
0 Suites skipped

2.2 building derbyTesting package

To build the derbyTesting package:

This is some typical output for the ant build process.

> cd /local/derby/java/testing
> ant.ksh
Searching for build.xml ...
Buildfile: /local/derby/java/testing/build.xml

    [javac] Compiling 30 source files to /local/derby/classes
     [copy] Copying 1 file to /local/derby/classes/org/apache/derbyTesting/funct

Total time: 10 minutes 3 seconds

Building using the ant all target places all files, that is, classes, but also supporting files such as expected output (*.out), sql test files (*.sql), properties files and any data files used in individual tests into the classes directory so they can all be found using the CLASSPATH.

Once you have built the derbyTesting package, you can make a derbyTesting.jar using the jar build target at the ${derby.source}level.

This will look something like:

c:> ant derbytestingjar
Searching for build.xml ...
Buildfile: C:\derby\build.xml

    [mkdir] Created dir: C:\derby\jars\
    [mkdir] Created dir: C:\derby\jars\lists
     [echo] Revision number set to exported
     [echo] .

     [echo] Beginning derbytesting.jar build

3. More details on running the derby functional tests

The functional tests are run using a class called 'RunTest'. This class calls a number of other classes. A group of tests, called a 'suite' is executed using a class called 'RunSuite'.

3.1 Running 1 test

See section 2.1 for the basic steps to run 1 test.

To pass on system level properties to the test harness, use the test harness property -DtestSpecialProps. For example, to ensure extra information is appended to the log: 

java -Dframework=DerbyNetClient -DtestSpecialProps=derby.infolog.append=true  org.apache.derbyTesting.functionTests.harness.RunTest lang/supersimple.sql

Tests will be executed in the current directory. When running a test using the network server and derby client, i.e. -Dframework=DerbyNetClient, the test will run in a subdirectory (automatically created) 'DerbyNetClient'.

The test will normally create the following:

possibly created:

When the test is successful, cleanup will occur unless the test harness property -Dkeepfiles=true is used. Cleanup will attempt to cleanup all files except for .pass.
See Note3.

A successful run (this example is from a dos environment) would look for instance like:

c:> derbyTesting.functionTests.harness.RunTest lang/supersimple.sql
-- listing properties --
*** Start: supersimple jdk1.4.2_03 2004-11-10 16:51:02 ***
The test should be running...
MasterFileName = master/supersimple.out
*** End:   supersimple jdk1.4.2_03 2004-11-10 16:51:25 ***

A Test Failure shows the diff, creates a .fail file, does not create a .pass file, and does not cleanup any files upon completion. The output might look like this:

 c:> derbyTesting.functionTests.harness.RunTest lang/supersimple.sql
-- listing properties --
*** Start: supersimple jdk1.4.2_03 2004-11-10 16:54:39 ***
The test should be running...
MasterFileName = master/supersimple.out
10 del
< 10
> 1
Test Failed.
*** End:   supersimple jdk1.4.2_03 2004-11-10 16:55:02 ***

3.2 Running a suite of tests

See section 2.1 for a basic explanation on how to run a suite of tests.

Tests will be run in a subdirectory with the name of the test suite under the current directory. Eg. for derbylang suite, a directory derbylang will be created. While the tests are run, information about the run is inserted into a <testsuite>.sum file. When all tests have completed summary files are created <testsuite>_pass.txt, _fail.txt, and _diff.txt files are created as well as a <testsuite>_report.txt with additional details. Some of the information is duplicate. Also, a .skip file will be created holding a list of the tests that were skipped (for more details on this, see the section on skipping tests).

RunSuite does not empty the top level directory before running. Thus, if another suite was run in the same directory at an earlier time, the resulting summary files might contain results for more than the current run. Therefore it is important to run each suite in a clean directory.

Sample output from RunSuite:

c:> $ java org.apache.derbyTesting.functionTests.harness.RunSuite derbylang
Top suite: derbylang
Suite to run: derbylang:derbylang
Now do RunList
Now run the suite's tests
Run the tests...
Execute command: java -DjavaCmd=java -Doutputdir=C:\derbyt1\derbylang\derbylang -Dtopsuitedir=C:\derbyt1\derbylang -Dtoprepo
rtdir=C:\derbyt1\derbylang -Drundir=C:\derbyt1 -Dsuitename=derbylang:derbylang -Dtopsuitename=derbylang org.apache.derbyTesting.functionTests.harness.RunTest lang/altertable.sql
Execute command: java -DjavaCmd=java -Doutputdir=C:\derbyt1\derbylang\derbylang -Dtopsuitedir=C:\derbyt1\derbylang -Dtopreportdir=C:\derbyt1\derbylang -Drundir=C:\derbyt1 -Dsuitename=derbylang:derbylang -Dtopsuitename=derbylang org.apache.derbyTesting.functionTests.harness.RunTest lang/arithmetic.sql
...(.more tests)....
Generated report: derbylang_report.txt

This output does not show whether the tests passed or failed. The Summary section in <testsuite>_report.txt shows the statistics of the passed vs. failed tests, the summary <testsuite>_*.txt files list the tests that passed and failed.

4. Harness internals for developers

The following is intended for people who have the subversion tree available and want to add or modify tests.

The test harness executing one test basically does the following in sequence:

4.1 Test types

The test harness recognizes, or will recognize tests with the following extensions:

4.2 Supporting files for tests

Various additional files may be used by a test, for instance, to create large data values, to test using of jar files and the like. Any files that need to be accessed by a particular test that are not accessed from the classpath need to be listed under supportfiles= in the <testname> file.
Tests can refer to classes without being in the classpath, and sql tests can use the ij command 'run resource ' to execute additional .sql files without changes to the files.

For example, in the file (org/apache/derbyTesting/functionTests/tests/)tools/

To support running on non-ISO-5889 systems, the harness copies files ending in sql, .view, .multi, .properties, .txt and .policy into local encoding; all other files are copied into UTF-8 encoding.

4.3 <testname>

Every test directory has a This file is for system level properties generic to all the tests in that test directory.

If a test requires different system level properties, a test specific properties file can be created to overwrite the defaults. The test specific properties file needs to have a name starting with the test file name, followed with

For example, for the test tools/, there is a properties file called tools/

4.4 <testname>

Every test directory has a This file is for derby specific properties common to all the tests in that test directory.
If a test requires different derby properties, a test specific properties file can be created to overwrite the defaults. The test specific properties file needs to have a name starting with the test file name, followed with

4.5 tmp files, out files, master files, and canons

The test's output will be put into a file testname.tmp. Then the output is modified if masking is required and the result is put into a .out file.
The expected output is found by examining the following directories, based on certain input

For example, if we are running a test and the flag -Dframework=DerbyNet is used, to use network server and the IBM Universal JDBC Driver ('jcc'), and the jvm we are using is Sun's jdk 142, and the jcc version is 2.4 (not available at time of writing) then the search for the master to compare with starts in the functionTests/derbynet/jcc2.4/jdk14 directory. If a .out file with the same name as the test is found in that directory, that master is taken. If there is no such file in that directory, search continues in the directory functionTests/derbynet/jcc2.4/jdk13 if it exists.

If there is no file there, nor for any other jcc directory, it will continue to derbynet/jdk14, and the search is continued for earlier jvm versions.
If we are not running network server, the DerbyNet and jcc_version directories are not traversed.

The version details do not go into the subversion level, i.e. running with jdk141 or jdk142 is expected to have the same behavior.

This functionality supports dealing with minor differences in behavior caused by minor differences in behavior in the underlying jvms, jcc versions, differences between results returned through network server vs. embedded and minor differences between a debug and non debug (jar) build.

However, having a large number of these files means a maintenance problem. Every time test output changes due to modifications to derby or to the test, all output files in all directories need to be updated accordingly. If at all possible, irrelevant differences should be masked out, or the test should be written so that the output does not reflect such items.

Suggestions to minimize canons:

4.6 Masking and comparing

Tests often fail because of unimportant differences, such as process ids, statement ids, timestamps. The derby functional test harness provides for masking of these differences at 2 levels:

  1. overall level. Masking required in all, or many tests can be achieved using the class Sed in the test harness directory. This class can either delete a reference present in the .tmp file from the .out file, or replace it with a generic string.

  2. test specific level. To make masking for only one test, a (testname) file can be created which allows to either remove a string from the output or to replace it.

The diff is executed between the final resulting output and the master file found copied into local encoding as .tmpmstr.

4.7  Adding a new test

To add a new test:


4.8 Suites and Adding a new suite

A suite constitutes of a <suitename>.properties file and/or a <suitename>.runall file in the org/apache/derbyTesting/functionTests/suites directory. The .properties files hold references to other .properties files, or .runall files, the .runall files are the actual lists of tests.

The lowest level suite always needs to have a .runall file.

For example, the derbyall suite is only a file that refers to other suites in the 'suites' property:
suites=derbylang derbynetclientmats derbynetmats storeall xa derbytools

The derbylang suite is only a derbylang.runall, which lists the tests. The derbynetclientmats suite has both a .runall and a .properties file, so some additional properties can be specified that are true for all tests in that suite.
suites=derbynetclientmats derbynetmats

To add a suite, you need to create at least a <suite>.runall file, which lists the actual tests, or a properties file that refers to other suites that do have a .runall file. The suite should be added into the directory ${derby.source}/java/testing/org/apache/derbyTesting/functionTests/suites.

4.9 Running with a new jvm

Currently, the supported jvms are:

    jdk131 - Sun HotSpot jdk1.3.1 - class: jdk13
    jdk141 - Sun HotSpot jdk1.4.1 - class jdk14
    jdk142 - Sun HotSpot jdk1.4.2 - class jdk14
    jdk15 - Sun HotSpot jdk1.5 - class jdk15
    jdk16 - Sun HotSpot jdk1.6 - class jdk16
    ibm131 - IBM Classic jdk1.3.1  - class ibm13
    ibm141 - IBM Classic jdk1.4.1 - class ibm14
    ibm142 - IBM Classic jdk1.4.1 - class ibm14
    ibm15 - IBM Classic jdk1.5 - class ibm15
    j9_13 - WCTME jvm (available with IBM Websphere Studio Device Developer, 5.6), version 2.1 - class j9_13
    j9_22 - WCTME jvm (available with IBM Websphere Client Technology Micro Edition, 5.7), version 2.2 - class j9_22
    j9_foundation - WCTME jvm (available with IBM Websphere Client Technology Micro Edition, 5.7), version 2.2, foundation library - class j9_foundation

The classes above are subclasses of org.apache.derbyTesting.functionTests.harness.jvm. The name at the front is just a convention.

To run a test with a jvm that does not have a matching class under org.apache.derbyTesting.functionTests.harness, do the following:

4.10 Skipping a test

There are 2 skipping mechanisms in place for different kinds of skipping of a test.

Some tests are written to test specific functionality only available with for instance certain jvms, or, with network server, certain versions of the IBM Universal Driver. To control this, properties can be set for each test, for instance, if a test should not be run when using an ibm jvm, set runwithibmjvm=false. If a test should be run with Sun Hotspot jvm version 14, then set runwithjdk14=true.
The skip setting does not go into the subversion level, i.e. setting runwithjdk141=false has no effect, and setting runwithjdk14 affects runs with jdk141 as well as jdk142.
Other skip reasons are encryption protocols specific to a certain jvm.

The property for skipping a test based on the version of the IBM Universal Driver is "excludeJCC".  The keywords "at-or-before" and "at-or-after" can be used to specify which range of JCC versions should be excluded.  If neither of these keywords is provided, the default is "at-or-before".  For example:

To skip a test when running with any version of the IBM Universal Driver that is 2.4 or earlier:

To skip a test when running with any version of the IBM Universal Driver that is 2.0 or later:

You can also specify an (optional) jvm clause to further tune the exclusion criteria.  This clause starts with the ",when" tag and is followed by a three-part jvm version.  In this case, a test will only be skipped if BOTH the JCC clause AND the jvm clause are true. For example:

To skip a test when running with any version of the IBM Universal Driver that is 2.4 or later, but ONLY if the jvm is 1.3 or earlier:

To skip a test when running with any version of the IBM Universal Driver that is 2.0 or earlier, but ONLY if the jvm is 1.5 or later:

Another skipping mechanism works on entire 'frameworks'. Currently there are only 3 supported in the harness, embedded, network server with the derbyclient driver ('DerbyNetClient') and network server with the IBM Universal JDBC Driver ('DerbyNet'). In the suites directory there are .exclude files for each of the frameworks - if for some reason an exclude file were not there, you would see a warning message show up for every test run. In this 'framework'.exclude file tests can be placed that for some reason need to be excluded from running with that framework. This mechanism enables adding of suites to a framework run even if a few of the tests are not appropriate for that particular framework.

Note that at this time, only skipped suites show up in the .skip result file. This still needs to be corrected.

4.11 Frameworks

Currently, there are two frameworks used for network server, DerbyNetClient, which uses the derby Client driver, and DerbyNet, which uses the IBM Universal JDBC Driver.
Setting the framework property will invoke the test harness class NetServer which has the actual configuration (driver name, portnumber etc.) used for the individual frameworks. See Note4.
Setting this framework also causes the search for expected output to include appropriate DerbyNetClient or  DerbyNet and jcc version specific subdirectories under the master directory.

4.12 Some test harness properties

For a complete set, refer to comments in, but here are some valuable test properties which can be passed to the RunTest class:

  • runwith<jvm> - See above section 4.10

  • framework - specifies which framework to run with. For example:
    java -Dframework=DerbyNetClient org.apache.derbyTesting.functionTests.RunTest

  • verbose - Shows more detailed output if set to "true". For example:
    java -Dverbose=true org.apache.derbyTesting.functionTests.RunTest lang/arithmetic.sql

  • keepfiles - Indicates to not clean up any of the files if the test passed if set to "true".

  • testSpecialProps - sets additional properties. Several can be set using '^' as separator:
    -DtestSpecialProps=<prop-1>=<value-1>^ ... ^<prop-n>=<value-n>. For example:
    java -DTestSpecialProps=derby.infolog.append=true org.apache.derbyTesting.functionTests.RunTest lang/arithmetic.sql

  • jvmflags - sets specific jvm properties for each jvm instantiated by the test harness, for instance for setting initial and maximum heap size (note that setting only initial size or only max size may cause incompatibilities with heap settings picked up from harness property files or from the command line), or other properties that need to be passed on to the jvm, separated by '^'. This property can be set on the commandline for either RunTest or RunSuite, or in one of the properties files used by the tests. The property jvmflags when passed on at the command line supercedes the properties set in a suite's propertyfile, and those supercede jvmflags properties set in a subsuite's or test's propertyfile, because the 'highest' level properties are passed to the jvm last. Setting this property for a test that runs with useprocess=false cannot have any effect. Example:
    java -Djvmflags=-Xms32M^-Xmx128M org.apache.derbyTesting.functionTests.RunTest lang/

  • excludeJCC -     See above section 4.10

  • useprocess - (default=true) Controls whether RunTest runs the test in a separate VM or in a thread in harness VM. Also does not create subdirectories for each test and thus will attempt to reuse databases with the same name. It is potentially useful for debugging tests. Unit tests are not (yet) runnable with "useprocess=false".

  • startServer - allows for Network Server tests to start and shutdown Network Server from the test itself. Default is true - i.e. the      test harness will start Network Server.

  • noSecurityManager disable the client JVM from installing a SecurityManager. See section 4.13
  • derbyTesting.replacePolicyFile - replace or append the contents of the default policy file derby_tests.policy. default is false, i.e. append. See section 4.13

  • hostName - allows for running Network Server on a remote host. See section 4.14.

  • derbyTesting.encoding - allows for running the harness with a different encoding. Only supported with jdk15. Example:

           java -DderbyTesting.encoding=UTF-16 org.apache.derbyTesting.functionTests.harness.RunTest jdbcapi/

  • generateUTF8Out - copies the test .out into UTF-8 encoding. See section 4.15.

  • derbyTesting.jar.path - This property is required to run upgrade tests. Set this property to point to the location of jar files from a previous release from which we need to test upgrade. This property needs to be set only if the source files will not be available when running tests. In this case, the jars can be copied to any location with the following relative path ${jar_location}/{majorversion.minorversion}. The property should be set as follows:


    If the test is run on the machine where the source files from svn have been built, then it is not required to set this property. The jars checked into svn will be used. If the tests are being run in a location where the jars from the previous release are available in a different location than where the source files for the upgrade tests have been built, the following property needs to be set on the command line for RunSuite or RunTest where the tests are being run:


    where {path_to_derby_jars} points to a directory where the jars for the previous Derby release being tested for upgrade reside in a subdirectory named according to the major.minor version. For example:

    If the Derby 10.1 jars for upgrade testing reside in /opt/testing/derby/10.1 then the command line needed for the upgrade tests to complete would include the following:

    java -Djvmflags=-DderbyTesting.jar.path=/opt/testing/derby org.apache.derbyTesting.functionTests.harness.RunSuite upgrade

    Please note that if you change the value of derbyTesting.jar.path you will need to remove the file org/apache/derbyTesting/functionTests/tests/upgradeTests/ from your output directory and run 'ant all' for the updated value of the property to be written into that generated file.

4.13 SecurityManager testing by default

By default the tests install the standard Java SecurityManager using the system property and use a policy file derby_tests.policy. The default file is sourced at

During a test run this policy file is copied into ${user.dir} and used from there.
Optionally a test-specific or suite-specific policy file may be appended or used instead. The name of the policy file remains derby_tests.policy.

A test_specific policy file has the same name as the test, has extension .policy, and is located in the same location as the test. For instance, ${derby.source}/java/testing/org/apache/derbyTesting/functionTests/tests/lang/errorStream.policy is the test-specific policy file for the test A suite-specific policy file has the same name as the suite, has extension .policy, and is located in the ${derby.source}/java/testing/org/apache/derbyTesting/functionTests/suites directory.

By default, a test-specific and/or suite-specific policy file is appended to the default policy file (derby_tests.policy). However, if a test's or suite's .properties file contains the property derbyTesting.replacePolicyFile=true, then the file derby_tests.policy will be overwritten with the contents of the test- or suite-specific policy file.

There are two environments for the installation of the SecurityManager.

4.14 Testing with Network Server on a remote host

To enable testing against a Network Server running on a remote machine - which is for instance needed to test on IPV6 machines - one can use the property hostName.
By default the network server is assumed not to be running, and the test harness will start Network Server on the local machine for each test - unless the test has been qualified explicitly with the property startServer to false. In that case, the test itself is assumed to be starting Network Server. (This can be set either in a test's property file or with the -D on the commandline). Thus, by default Network Server is started and shutdown in the subdirectory for the framework created for each test, and new databases are created in each test directory (e.g. ./getCurConnJdbc20/wombat). The test policy file also gets copied to the appropriate location.
When one wants to run against a Network Server running on a remote machine, the test harness cannot start or stop it because of security reasons. Thus, the setting of the property hostName automatically sets startServer to false. The hostName is automatically passed on to the actual test run as the property ${derbyTesting.serverhost} which is used in the derby_tests.policy file on the client machine.
The hostName property is not a pre-set value in any suite, some manual steps are required to run tests this way:
  1. Extract and/or copy the (java/testing/org/apache/derbyTesting/functionTests/util)derby_tests.policy from the derbyTesting.jar or from the svn source to a location on the host on which you want to run the NetworkServer
  2. Set up the classpath for Network Server to include derbynet.jar and derbyTesting.jar (or equivalent classes). You need to have derby.jar available also, although it does not need to be in the classpath.
  3. Start Network Server like so when using compiled classes for it:
java -DderbyTesting.codeclasses=file:/derby/classes/ -DderbyTesting.codedir=/derby/classes -DderbyTesting.serverhost=localhost -DderbyTesting.clienthost=clientIPaddress -DderbyTesting.codejar=file://unused/ org.apache.derby.drda.NetworkServerControl -h start
where /derbyt/classes is the directory where the classes can be found, and clientIPaddress is your client machine's IP address or name. In this example, derby.system.home is in the directory where Network Server is started, and the derby_tests.policy file is in that directory too.
          or like so when using jars:
java -Dderby.system.home=/home/derbytst/ns -DderbyTesting.clienthost=clientIPaddress -DderbyTesting.codejar=file:/derby/tstbld/ -DderbyTesting.codedir=/derby/tstbld -DderbyTesting.serverhost=localhost -DderbyTesting.codeclasses=file://unused/ org.apache.derby.drda.NetworkServerControl -h start
where /derbyt/tstbld  is the directory where derbynet.jar is found and derby.system.home points to the directory where your are and where you want to have derby.log and any databases go, and clientIPaddress is your client machine's IP address or name.
  1. On the client machine, start the tests as usual, but specifying hostName, like so:
java org.apache.derbyTesting.functionTests.harness.RunSuite derbynetclientmats
where is the host name or ip address.

RunTest can pick up the property in a similar way. You can set -Dframework as usual. You can also run derbynetmats with jcc using -DhostName flag; in that case you do not need to worry about running with a policy file - at the moment, tests run with DerbyNet framework do not run with SecurityManager. Tests in the derbynet(client)mats suite have been modified to run against a remote server as much as possible.

When the test harness encounters the -DhostName, and the value is not null and not localhost, it switches to startServer=false. Also, against a remote host, only the ping operations of the NetworkServerControl is supported. Finally, because on the remote server no new directories can be created by the test harness because of security, databases will be reused. This has a number of implications:
  1. the test harness, or individual tests cannot start and stop Network Server.
  2. the tests cannot check derby.log, nor data files created on the server by import/export or dblook utilities.
  3. as the database location is the same for each test, tests run this way need to be diligent about cleaning up after or will cause failures in later tests. The .java tests can use the TestUtil.cleanUp method to drop any database object without any output being reflected. Test writers need to ensure that the objects are in fact getting dropped or the test needs to be excluded from running remotely. To facilitate cleanup, a method was added to org.apache.derbyTesting.functionTests.util.TestUtil, cleanUpTest(Statement, testObjects[]). This method drops anything passed in the array of strings and disregards any SQLExceptions. The benefit of this is that a possible failure of drop does not stop the test, and does not prevent other objects passed in the string to be dropped. An example of usage of this method:
        static void teardown() throws SQLException {
            Statement stmt = conn.createStatement();
            String[] testObjects = { "table t1", "table t2", "procedure p1", "schema s restrict"};
            TestUtil.cleanUpTest(stmt, testObjects);
    Note that if something prohibits an object from being dropped, e.g. if there still are locks on it, this will not be noticed with this method - the test writer should still verify that the test objects get cleaned up appropriately.
  4. tests cannot use a mix of Network Server and local connections to the same database.
  5. tests should not hardcode the string 'localhost' or they cannot be run in this fashion. Tests that need to be run in this fashion can use the result of the TestUtil.getHostName() method instead.
  6. Tests can only use the ping option of the NetworkServerControl class.
  7. Tests cannot be dependent on test- or suite-specific policy files.
New .exclude files for the current frameworks (i.e. DerbyNetRemote.exclude and DerbyNetClientRemote.exclude) have been created to skip some tests that cannot be run against a remote server because of those implications.

4.15 Encoding issues

There are three aspects to dealing with encoding issues, how to run a test with specific encoding, what to do to ensure a test can be run without relying on a certain encoding, and how to generate test output in fixed encoding.

To force a specific test to run with a specific encoding one can use the property derbyTesting.encoding. This is currently only supported with jdk15. For instance, to run a specific .java test one time only with -DderbyTesting.encoding:

java -DderbyTesting.encoding=UTF-16 org.apache.derbyTesting.functionTests.harness.RunTest jdbcapi/

          The test encodingTests contains tests that run with derbyTesting.encoding=UTF-16 in the file:


Special care is required to ensure that individual tests can be run successfully on non-ISO-5889 systems. This includes:



A number of tests require packages that are optional with jdk13, but included with later jvms: jdbc20ext.jar and jta1_2.jar. When running with jdk131, these need to be downloaded separately & placed in the jre/lib/ext directory of your jvm installation.


There is one more suite included: the j9derbynetmats suite is a modification of the derbynetmats suite. It is available to test the network server with the jvm available with IBM's WCTME (Workplace Client Technology, Micro Edition; formerly WSDD), and will be run at IBM. Note that the setup for running the j9derbynetmats tests is very specific to the test harness, not even using the WCTME files in their normal location.
The j9derbynetmats suite is included to serve as an example of splitting the network server process to run with a different jvm than the test client. The j9derbynetmats suite will run with another jvm as client (as defined in the suite properties), but start up network server with the 'j9' jvm files (the reference to 'j9' is based on the executable, j9.exe), based on the property 'serverJvm'. Running this suite requires providing the property  bootcp, which is  interpreted from the test harness class j9_13. See also section on adding a new jvm setup.


Occasionally, cleanup is unsuccessful. This does not constitute a problem in any way, as the harness for most suites starts with a clean database, and clean copies of all files. However, you will see something like this in the output:
Warning: Cleanup failed on baseDir: /local/myrun1/DerbyNet/supersimple.


NetServer also has a configuration for connecting to DB2 via jcc - the IBM Universal Driver - and via the older DB2 driver. But there are currently no tests to exercise these settings.