Verify multiple rows and then data drive

Ok, first things first. Please notice that your excel starts with the Id = 0 while the response starts with Id = 1.

Nevertheless my script was wrong. Here you have the same script with some corrections and logs added to it:

import groovy.json.JsonSlurper

// Get the id from the datasource
def id = context.expand('${DataSource#ID}') as Integer
log.info "The id collected from the datasource is '" + id + "'." 

// Get the response from the GetResponse step
def response = context.expand('${GetResponse#Response}')

// Parse the response with JsonSlurper
def jsonSlurper = new JsonSlurper()
def jsonObject = jsonSlurper.parseText( response )

// Get the element where the ID is the same as in the datasource
log.info "Trying to find the element with id " + id + " in response..."
for (item in jsonObject.value) {
	if (item.Id == id) {
		log.info "Element found. Comparing the datasource data with the response data..."
		
		// Start comparison
		log.info "The TestID value collected from the datasource is '" + context.expand('${DataSource#TestId}') + "' while the response value is " + item.TestID + "'."
		assert item.TestID.equals( context.expand('${DataSource#TestId}'))

		log.info "The TestName value collected from the datasource is '" + context.expand('${DataSource#TestName}') + "' while the response value is '" + item.TestName + "'."
		assert item.TestName.equals( context.expand('${DataSource#TestName}'))

		log.info "The Assays value collected from the datasource is '" + context.expand('${DataSource#Assay}') + "' while the response value is '" + item.Assays + "'."
		assert item.Assays.equals( context.expand('${DataSource#Assay}'))

		log.info "The Analyses value collected from the datasource is '" + context.expand('${DataSource#Analyses}') + "' while the response value is '" + item.Analyses + "'."
		assert item.Analyses.equals( context.expand('${DataSource#Analyses}'))

		log.info "The Cassettes value from the datasource is '" + context.expand('${DataSource#Cassettes}') + "' while the response value is '" + item.Cassettes + "'."
		assert item.Cassettes.equals( context.expand('${DataSource#Cassettes}'))

		log.info "The Enabled value from the datasource is '" + context.expand('${DataSource#Enabled}') + "' while the response value is '" + item.Enabled + "'."
		assert item.Enabled == context.expand('${DataSource#Enabled}').toBoolean()

		log.info "The UserDefined value from the datasource is '" + context.expand('${DataSource#UserDefined}') + "' while the response value is '" + item.UserDefined + "'."
		assert item.UserDefined == context.expand('${DataSource#UserDefined}').toBoolean()
	}
}