CODEWITHSUNDEEP
jsongroovy
mojo1012
mojo1012

Reputation: 19

Groovy-Json example - map object returns null value

I'm practicing this example to validate some book price out of a json response but I'm encountering error:

Exception thrown

java.lang.AssertionError: Unable to find the title A Nice Novel. Expression: (books instanceof java.util.Map). Values: books = null at validateBookPrice.verifyBookPrice(validateBookPrice.groovy:29) at validateBookPrice$_run_closure1.doCall(validateBookPrice.groovy:22) at validateBookPrice.run(validateBookPrice.groovy:20)

Here are my code examples:

def slurper = new groovy.json.JsonSlurper()

//sample json response
def obj = '''{ "bookStore" : [ { "category" : "novel",
    "author" : "Mr. J Thomas",
    "title" : "A Nice Novel",
    "price" : "$25.00"
  },
  { "category" : "biography",
    "author" : "Mrs.Jones",
    "title" : "A Biography of Mr. Jones",
    "price": "$35.00"
  }]}'''

 def bookData= slurper.parseText(obj)

//sample book prices to be validated
def books= [ "A Nice Novel" : "\$25.00", "A Biography of Mr. Jones" :    "\$35.00"]
books.each{key, value ->
     def expected_value ="${value}"
     verifyBookPrice(bookData, key, expected_value)
}



def verifyBookPrice(bookData, title, expected_value) {
       Map books = bookData.bookStore.find{it.key == title }
       assert books instanceof Map:"Unable to find the title $title"
       String actual_value = books.price as String
       assert actual_value == expected_value:"The value of field $field is  $actual_value, expecting $expected_value"
}

Upvotes: 1

Views: 1198

Answers (1)

Rao
Rao

Reputation: 21359

Here is the fixed script:

Changed from : bookData.bookStore.find{it.key == title }

To : bookData.bookStore.find{it.title == title}

def slurper = new groovy.json.JsonSlurper()

//sample json response
def obj = '''{ "bookStore" : [ { "category" : "novel",
    "author" : "Mr. J Thomas",
    "title" : "A Nice Novel",
    "price" : "$25.00"
  },
  { "category" : "biography",
    "author" : "Mrs.Jones",
    "title" : "A Biography of Mr. Jones",
    "price": "$35.00"
  }]}'''

def bookData= slurper.parseText(obj)

def verifyBookPrice(bookData, title, expected_value) {
       Map book = bookData.bookStore.find{it.title == title}
       assert book instanceof Map:"Unable to find the title $title"
       String actual_value = book.price as String
       assert actual_value == expected_value:"The value of field $title is  $actual_value, expecting $expected_value"
}

//sample book prices to be validated
def books= [ "A Nice Novel" : "\$25.00", "A Biography of Mr. Jones" :    "\$35.00"]
books.each{key, value ->
     verifyBookPrice(bookData, key, value)
}

You may quickly try online Demo

Upvotes: 1

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