Enhanced Web Service Testing
Kirk Steffke
AppExchange Practice Lead
kirk@crmscience.com
@kirkevonphilly
A Better Mock Structure

• Test Coverage Overview
• Review of Native Testing Methods
• WebServiceMock and HttpCalloutMock
Interfaces
• StaticResourceCalloutMock
• MultiStaticResourceCalloutMock
• Sample Scenarios
• Better Mock Structure
• Setup
• Review
Agenda
During this session

Test Coverage Overview

• Who: Developers
• What: Code written… about code
• When: Production Org bound code
• Where: Sandboxes and developer orgs
• Why: Safety first
Apex Test Coverage
Who, What, When, Where, and Why

Apex Test Coverage
Who, What, When, Where, and Why
Works!
Doesn’t
Work!
Should Good work!
!
Shouldn’t ! (silence)

Apex Test Coverage
A Bit More of “How”
Grandma’s Famous Recipe
1. Write code to do
something
2. Create test class
3. Mark with @isTest
4. Create test method
5. Create test data
6. Invoke code being tested
7. Assert (+ or -)

Native Testing Strategies
The Tools that are Already in your Toolbox

• Exist/defined in a separate
class
• Returns single callout
response
• WebServiceMock for WSDL
based SOAP callouts
• HttpCalloutMock for testing
Http callouts
• Defined by content of text file
in Static Resource
• Returns response for a single
endpoint
• Similar to
StaticResourceCalloutMock
• Static Resource contains
response for multiple
endpoints
WebServiceMock and
HttpCalloutMock Interfaces
StaticResourceCalloutMock MultiStaticResourceCalloutMock
Documentation: bit.ly/df15mock3Documentation: bit.ly/df15mock1 Documentation: bit.ly/df15mock2
Options for Testing HTTP Callouts
Out-of-the-box Tools

• Class with single method
• Method makes a callout
• Testing with:
• HttpCalloutMock Interface
• StaticResourceCalloutMock
Upcoming Examples
Examples 1 and 2: Single Callout
Class
Callout Method
External API Endpoint
Request
Response

• Class with three methods
• Two methods make different callouts
• One method calls both callout methods
• Testing with:
• MultiStaticResourceCalloutMock
Upcoming Examples
Example 3: Multiple Callouts
External API Endpoint 2Request
Response
Class
External API Endpoint 1
Request
Response
Both Callouts
Callout Method 2
Callout Method 1

Code Demos
Examples 1, 2, and 3

Complex Scenario
A hypothetical, but real-world model to help you digest

• Batch job
• Import of Contacts from remote system
• Remote system has an API
• Two endpoints
• /api/ContactCount
• /api/Contacts
Remote Import via Batch
Overview

• /api/ContactCount
• Returns # of Contact records to be imported
• Result can change during span of batch execution
• /api/Contacts
• Returns x number of contacts
• Paginated
• Page=1 – returns 1st 200 records
• Page=2 – returns 2nd 200 records
• …and so on
Remote Import via Batch
Meet the Endpoints

1. Batch is called
2. Start() method
3. Each execute() iteration performs 2 callouts
4. 1st checks total # of records available
5. 2nd imports records
6. End of execute determines if more
records?
7. Execute may run for many iterations
8. If no more records or limits, finish()
9. Restart cycle
10. End
Remote Import via Batch
Batch Flow

• Class with three methods
• Two methods make different callouts
• One method calls both callout methods
• Simulate batch w/ a loop
Upcoming Examples
Example 4: Multiple Everything
Contact DataRequest
Response
Class
Callout Method 1
Contact Count
Request
ResponseCallout Method 2
x10

Limitations
Working with Our Tools
• HttpCalloutMock Interface and StaticResourceMock
• Can only handle one endpoint
• Single response
• Single setup prior to invoking actual callouts
• MultiStaticResourceCalloutMock
• Handle multiple endpoints
• Single response for each
• Single setup prior to invoking actual callouts

Problems
Continued…
• Challenge
• Use one or more standard tool
• Extend the usage
• Create queue of expected responses per endpoint
• Consider re-usability

Response Generator
The Playlist Structure
Method
GET/POST/etc
Endpoint
/api/endpoint
Responses
[0] response 1
[1] response 2
[x] response x
• Like music at a party
• Some want to rock
• Some want to dance
• Sometimes you want to hear the same song again

Response Generator
The “Count” Playlist
Method
GET
Endpoint
Contact Count
Responses
[0] 10 Contacts
[1] 12 Contacts
[x] 12 Contacts

Response Generator
The “Data” Playlist
Method
GET
Endpoint
Contact Data
Responses
[0] Data 0-199
[1] Data 200-399
[9] Data x

Code Demo
Example 4

Testing the Solution
TestCalloutClass
1. Count or Contact callout
2. # of loop iteration
3. Count data 10, 12, 12, …
1. Use 1st, discard
2. Use 2nd, don’t discard
4. Contact data increments
1. Provided per page response

Resources
Blog.crmscience.com
• Blog Post: http://bit.ly/df15_kirk_blog
• Unmanaged Package with all examples: http://bit.ly/df15_kirk_pack
• Link to deck: http://bit.ly/df15_kirk_deck

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Questions
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