Use Gmail API in a keyword in Katalon Studio - groovy

Question

I use this tutorial to connect to Gmail API: https://developers.google.com/gmail/api/quickstart/java
I would like to make a keyword in Katalon Studio, which depends on Gmail API.
I modified from sample code that line:
InputStream in = GmailQuickstart.class.getResourceAsStream(CREDENTIALS_FILE_PATH);
to this:
InputStream ins = new FileInputStream(CREDENTIALS_FILE_PATH);
JAR files are added, project is running and browser window is opened to get token. After successful authorization I got error message:
Caused by: java.lang.NoSuchMethodError:
com.google.api.client.http.HttpRequest.setResponseReturnRawInputStream(Z)Lcom/google/api/client/http/HttpRequest;
UPDATE: List of imported dependencies:
commons-codec-1.15.jar
commons-logging-1.2.jar
google-api-client-1.31.3.jar
google-api-client-extensions-1.6.0-beta.jar
google-api-client-jackson2-1.31.3.jar
google-api-client-java6-1.31.3.jar
google-api-services-gmail-v1-rev110-1.25.0.jar
google-http-client-1.39.1.jar
google-http-client-jackson2-1.39.1.jar
google-oauth-client-java6-1.31.4.jar
google-oauth-client-jetty-1.31.4.jar
guava-30.1.1-jre.jar
httpclient-4.5.13.jar
httpcore-4.4.14.jar
j2objc-annotations-1.3.jar
jackson-core-2.12.2.jar
jsr305-3.0.2.jar

Answer 1

https://docs.katalon.com/katalon-studio/docs/external-libraries.html#exclude-built-in-libraries
With the ability to remove built-in libraries stored in the .classpath file of a project folder, you can replace a built-in library with an external one for flexible libraries usage in a test project.
Requirements
An active Katalon Studio Enterprise license.
Katalon Studio version 7.8.
UPD:
i got katalon 7.9.1 and here how i was able to do it:
add the following class into KS project:
include/scripts/groovy/(default package)/GroovyBox.java
import groovy.lang.*;
import java.util.regex.Pattern;
import java.util.Map;
import java.util.List;
/** run groovy script in isolated classloader*/
public class GroovyBox {
GroovyShell gs;
public GroovyBox(ClassLoader parentCL, Pattern excludeClassPattern ) {
FilteredCL fcl = new FilteredCL(parentCL, excludeClassPattern);
gs = new GroovyShell(fcl);
}
public GroovyBox withClassPath(List<String> classPathList) {
GroovyClassLoader cl = gs.getClassLoader();
for(String cp: classPathList) cl.addClasspath(cp);
return this;
}
public Script parse(String scriptText) {
return gs.parse(scriptText);
}
public static class FilteredCL extends GroovyClassLoader{
Pattern filterOut;
public FilteredCL(ClassLoader parent,Pattern excludeClassPattern){
super(parent);
filterOut = excludeClassPattern;
}
#Override protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException{
if(filterOut.matcher(name).matches())throw new ClassNotFoundException("class not found "+ name);
return super.loadClass(name, resolve);
}
}
}
now add a test case - actually you can move code from test case into a class...
import ... /* all katalon imports here*/
assert method1() == 'HELLO WORLD'
def method1() {
def gb = new GroovyBox(this.getClass().getClassLoader().getParent(), ~/^com\.google\..*/)
def script = gb.parse('''
#Grab(group='com.google.api-client', module='google-api-client', version='1.31.3')
import com.google.api.client.http.HttpRequest
def c = HttpRequest.class
println( "methods execute:: "+c.methods.findAll{it.name=='execute'} )
println( "methods setResponseReturnRawInputStream:: "+c.methods.findAll{it.name=='setResponseReturnRawInputStream'} )
println greeting
return greeting.toUpperCase()
''')
script.setBinding([greeting:'hello world'] as Binding)
return script.run()
}
options to define external dependencies:
#Grab(...) as a first line of parsed script - loads all required dependencies from maven central (by default). for example #Grab(group='com.google.api-client', module='google-api-client', version='1.31.3') corresponds to this artifact.
sometimes you need to specify specific maven repository then add #GrabResolver(name='central', root='https://repo1.maven.org/maven2/')
if you want to specify local file dependencies then in the code above:
def gb = new GroovyBox(...).withClassPath([
'/path/to/lib1.jar',
'/path/to/lib2.jar'
])