How to write Katalon Studio tests with IntelliJ IDEA and other IDEs

Product Forums Katalon Studio
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I tried patching the Katalon Studio engine by writing Groovy classes in the Include/scripts/groovy folder as devalex88 suggested. I worked on my GitHub project Cannot_find_elements_when_XPath_expression_is_null. You can checkout the tag 0.4 to my last code.

patching the class com.kms.katalon.core.util.internal.ExceptionsUtil

devalex88 suggested this patch.

The patch resulted the following stacktrace: log_withPatchToExceptionsUtil.txt

com.kms.katalon.core.exception.StepFailedException: Unable to verify object 'Object Repository/Page_AngularJS Hub  Text Inputs/iframe_Example_exampleIFrame' is present (Root cause: java.lang.IllegalArgumentException: Cannot find elements when the XPath expression is null.)
	at com.kms.katalon.core.keyword.internal.KeywordMain.stepFailed(KeywordMain.groovy:36)
	at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.stepFailed(WebUIKeywordMain.groovy:65)
	at com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain.runKeyword(WebUIKeywordMain.groovy:27)
	at com.kms.katalon.core.webui.keyword.builtin.VerifyElementPresentKeyword.verifyElementPresent(VerifyElementPresentKeyword.groovy:92)
	at com.kms.katalon.core.webui.keyword.builtin.VerifyElementPresentKeyword.execute(VerifyElementPresentKeyword.groovy:68)
	at com.kms.katalon.core.keyword.internal.KeywordExecutor.executeKeywordForPlatform(KeywordExecutor.groovy:53)
...

This stacktrace is NOT interesting. I want to know which line of code in which method of which class raied the IllegalArgumentException. But this statcktrace does not tell me.

patching the class com.kms.katalon.core.webui.keyword.internal.WebUIKeywordMain class.

I suggested this at Cannot find elements when XPath expression is null.

This patch resulted the following statcktrace: log_withPatchToWebUIKeywordMain.txt

...
	at com.kms.katalon.core.webui.common.WebUiCommonHelper.buildLocator(WebUiCommonHelper.java:497)
...
	at com.kms.katalon.core.webui.keyword.builtin.VerifyElementPresentKeyword$_verifyElementPresent_closure1.doCall(VerifyElementPresentKeyword.groovy:79)

These lines are informative. I could find that the Exception was raised at line497 in WebUiCommonHelper

           case XPATH:
                return By.xpath(to.getSelectorCollection().get(selectorMethod));

I can conclude that the expression to.getSelectedCollection().get(selectorMethod) returned null. This is the root cause of the problem!

My conclusion

Patching ExceptionsUtil class is not useful, but patching WebUIKeywordMain class is useful.

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