Assert Equals

This assertion is used to check if the element value described by the expression is equal to a specific value. A direct one-to-one comparison. Parameters:
Name Type/Value Required
Expression Expression Yes
Value String Yes
Type ‘integer’ or ‘float’ No
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Value: The value we want to compare the expression to. Type: The data type of the value. This attribute is optional. If no type is defined the values will be compared as strings. If the type is set the values will evaluated with the chosen comparator (ex: ‘integer’ as a whole number, ‘float’ as a decimal number). Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Examples:
<assert-equals expression=”data.code” value=”500″/>
<assert-equals expression=”data.code” value=”500″ type=”integer”/>

Assert In

This assertion is used to check if the element described by the expression matches at least one item from a given list. For example, the category of a product is one of the approved categories such as men, women, or children. Parameters:
Name Type/Value Required
Expression Expression Yes
Value String Yes
Type ‘integer’ of ‘float’ No
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Value: The value we want to compare the expression to. Type: The data type of the value. This attribute is optional. If no type is defined the values will be compared as strings. If the type is set the values will evaluated with the chosen comparator (ex: ‘integer’ as a whole number, ‘float’ as a decimal number). Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Examples:
<assert-in expression=”data.type” value=”[‘paperbook’,’ebook’]”/>
<assert-in expression=”data.price” value=”[5.50,7,9.79]” type=”float”/>

Assert Less

This assertion is used to check if the element value described by the expression is less than a proposed value. The values can be compared as a string or number. Parameters:
Name Type/Value Required
Expression Expression Yes
Value String Yes
Type ‘integer’ or ‘float’ No
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Value: The value we want to compare the expression to. Type: The data type of the value. This attribute is optional. If no type is defined the values will be compared as strings. If the type is set the values will evaluated with the chosen comparator (ex: ‘integer’ as a whole number, ‘float’ as a decimal number). Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Examples:
<assert-less expression=”data.code” value=”4503″/>
<assert-less expression=”data.code” value=”4503″ type=”integer”/>

Assert Greater

This assertion is used to check if the element value described by the expression is greater than a proposed value. The values can be compared as a string or number. Parameters:
Name Type/Value Required
Expression Expression Yes
Value String Yes
Type ‘integer’ or ‘float’ No
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Value: The value we want to compare the expression to. Type: The data type of the value. This attribute is optional. If no type is defined the values will be compared as strings. If the type is set the values will evaluated with the chosen comparator (ex: ‘integer’ as a whole number, ‘float’ as a decimal number). Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Examples:
<assert-greater expression=”data.code” value=”4503″/>
<assert-greater expression=”data.code” value=”4503″ type=”integer”/>

Assert Contains

This assertion is used to check if the element described by the expression contains a specific substring. For example, to test the word Uber is in Uber’s product names (UberX, UberBlack, UberPool). Parameters:
Name Type/Value Required
Expression Expression Yes
Value String Yes
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Value: The value we want to compare the expression to. Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Examples:
<assert-contains expression=”data.url” value=”domain.com”/>
<assert-contains expression=”data.id” value=”${id}”/>

Expression

Basics

Expressions are fields referencing an item in the test scope. The item can be a variable or an inner value in a data structure, such as a JSON. Most expressions will start with the name of the variable the data is stored in. When working with structured data, expression is the path for reaching out a specific element using the Mastiff language. Most of the time, it’s just “dot notation”. In this example, we will assume the data has been assigned to a variable named “payload”. Example:
"data":{
  "created_time": "1453198835",
  "images": {
    "thumbnail": {
      "width": 150,
      "url": "https://domain.com/photos/9451802655724661601789699.jpg",
      "height": 150
      }
   },
  "Total-items": 1
}
If you want to reach the value of the ‘created_time’ attribute:
payload.data.created_time
If you want to check the ‘width’ of the images:
payload.data.images.thumbnail.width

Special Characters

The “Total-items” element is a bit tricky, because the minus sign ( – ) would be misunderstood by the Mastiff language and treated as a subtraction operation. For this reason, the ‘Dot Notation’ requires the square brackets, as in:
data[‘Total-Items’]

XML

The above statements are valid for both JSON and XML. When you have to reference XML attributes, the ‘Dot Notation’ is valid but the attribute has to be written between the square brackets and preceded by the ‘@’. Note: In XML, the root element is the variable itself so you won’t need to reference it explicitly. Example:
<HotelList size="2">
    <HotelSummary order="0">
        <hotelId>20160502</hotelId>
        <name>Hotel One</name>
    </HotelSummary>
    <HotelSummary order="1">
        <hotelId>20160503</hotelId>
        <name>Hotel Two</name>
    </HotelSummary>
</HotelList>
If we want to check the ‘size’ attribute, you have to write
payload[‘@size’]

Functions

Expressions can also contain directives to transform the data you are willing to evaluate. For instance:
<HotelList size="2">
    <HotelSummary order="0">
        <hotelId>20160502</hotelId>
        <name>Hotel One</name>
    </HotelSummary>
    <HotelSummary order="1">
        <hotelId>20160503</hotelId>
        <name>Hotel Two</name>
    </HotelSummary>
</HotelList>
payload.HotelSummary.size()
Will count the number of instances of HotelSumary.

Expressions “everywhere”

Expressions are automatically evaluated in the “expression” fields, but can also be introduced in other fields, such as “value”, with a specific notation. In this example, we compare the actual size of the collection with the “size attribute”, by enclosing the expression within ${ .. } The “type” attribute ensures the comparison will happen with a numeric comparator, rather than string. Further readings, see Expression extensions

Assert Exists

This assertion is used to check if the element described by the expression exists. The presence of the element, even empty, is enough to consider it a valid assertion. Parameters:
Name Type/Value Required
Expression Expression Yes
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Example:
<assert-exists expression=”data.id”/>

Assert Is

This assertion is used to check if the value of the element defined by the expression belongs to a specific type. This is one of the more commonly used assertions because it can be used to verify various things such as whole numbers, email addresses, phone numbers, URLs, and so forth. Parameters:
Name Type/Value Required
Expression Expression Yes
Type ‘integer’, ‘float’, ‘url’, ‘boolean’, ‘phone’, ’email’, ‘map’, ‘array’ Yes
Mode ‘all’ or ‘one’ No
Level ‘error’ or ‘warning’ No
Modifier ‘not’ No
Execute if item exists ‘true’ or ‘false’ No
Stop test if fails ‘true’ or ‘false’ No
Comment String No
  Expression: It’s the path to the element we want to operate on (ex: payload.ProductID). See Expression for more details. Type: The data type of the value. The possible values are: ‘integer’, checks if field is an integer value; ‘float’, checks if field is a decimal value; ‘url’, checks if the field is a well formatted url; ‘boolean’, checks if field is a boolean value; ‘phone’, checks if field contains a valid phone number format; ’email’, checks if field is a valid email format; ‘map’, checks if field is a map type; ‘array’, checks if the field is an array Mode: Specify if all the same elements in the payload should match the assertion (‘all’) or if only one element (‘one’) is enough. Level: Specify if the assertion fails whether it should be considered an ‘error’ or just a ‘warning.’ A warning will not trigger alerts (such as email or text messages). Modifier: The assertion is considered verified if it does not pass. Execute if item exists: The assertion is evaluated only if the element exists. This is useful when the element does not always exist. Stop test if fails: The test will be immediately stopped if the assertion fails.   Code View Example:
<assert-is expression=”data.id” type=”integer”/>