How to validate whether a sub-string is occuring in every object in an array in the response?

harshabongle :

You can use below groovy code to verify whether all node contains batch or not.

def json = new JsonSlurper().parseText(res)
def list_size = json.result.list.size()
for(int i = 0 ; i<list_size ; i++){
	def name = json.result.list[i].name
	assert name.contains("batch") : "Didn't contains batch in name tag "+name
}

Below is the Script Assertion (one liner)

assert new groovy.json.JsonSlurper().parseText(context.response).result.list.name.every {it.contains('batch')}, 'All names contain BATCH check failed'

Just convert the name string to upper case and check BATCH

assert new groovy.json.JsonSlurper().parseText(context.response).result.list.name.every {it.toUpperCase().contains('BATCH')}, 'All names contain BATCH check failed'

harshabongle : You can use below code, it will convert given String to lower case and then validate whether particular word exist or not:

assert name.toLowerCase().contains("batch") : "Didn't contains batch in name tag "+name

If you don't want to convert to upper or lower case to compare, then use regular expression as shown below:

assert new groovy.json.JsonSlurper().parseText(context.response).result.list.name.every {it =~ /(?i)batch/}, 'All names contain BATCH check failed'