Create DataTable for Junit Node Testing

Node Development
#1

Hi,

i want to TDD a Node because I found a few bugs and want to get sure its now bugfree. But I cant write my Testcase without creating a TestDataTable. Is there already sth. I can use, because writing my own Implementation of a DataTable ends with the try to create an Instantiation of DataTableSpec because there is an Error creating the NodeLogger.

So is there a way to create Junit tests? I hope so, because its a very complex Node I'm implementing.

 

best Regards

#2

Because there are no answers till now, i post the error message I receive while creating a ColumnSpec with the ColumnSpecCreator:

log4j:ERROR Could not parse url [file:/C:/Users/alwin/knime/log4j.xml].
org.xml.sax.SAXParseException: Premature end of file.

at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
    at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
    at javax.xml.parsers.DocumentBuilder.parse(Unknown Source)
    at org.apache.log4j.xml.DOMConfigurator$2.parse(DOMConfigurator.java:612)
    at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:711)
    at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:618)
    at org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:743)
    at org.knime.core.node.NodeLogger.<clinit>(NodeLogger.java:167)
    at org.knime.core.data.DataColumnSpecCreator.<clinit>(DataColumnSpecCreator.java:89)
    at olap.QuantaMatriceTest.createOutSpec(QuantaMatriceTest.java:108)

#3

This has nothing to do with your node. Please check the file "C:/Users/alwin/knime/log4j.xml", it seems to be broken.

#4

Apart from that you want to install the "KNIME Testing Application" and read the document in the "doc"-folder.

#5

Where can I find the "KNIME Testing Application"???? I didn't found sth. like that either on the mainpage nor here at the techpages.

#6

This is an extension you can simply install from the KNIME Update Site.

#7

So I've no installed the extension but it doesn't bring the expected features with it, so it only provides a autoamtic way to test Workflows but I want to test Methods, because my Node is very complex. So it seems that this suggestion will not make it for my.

Any other suggestions?

 

thanks

#8

It depends on what and how accurate you want to test. You can certainly test you method using a workflow with the node and the Differ nodes from the Testing extension. You need many branches though if your node is very complex. I suggest you are using a normal JUnit test for your algorithm instead then.