IBM Systems Magazine, Mainframe - March/April 2017 - 49


Some run their test suites less
frequently, and others optimize
the tests they run. Optimization,
in this context, is the process
of choosing the minimum set of
tests that most effectively cover
the code under test.
Cognitive test optimization
tooling can help determine the
optimal set of tests for an organization to run. This is categorized
as cognitive because it can help
organizations make decisions
based on data analysis. The
relevant data for automated tests
is code coverage results-information that's collected during
a test to see which lines of code
in the application under test are
executed. Code coverage is a
powerful metric for indicating the
quality of automated tests, especially when measured across the
entire suite of tests. The higher
the code coverage, the better.
Test optimization tooling combs
through the code coverage results
to find the minimum set of tests
necessary to meet an organization's goals.
For example, an organization
runs 1,000 automated tests for its
application nightly and has a code
coverage goal of 85 percent. Code
coverage statistics are gathered,
and these tests have a collective
code coverage of 90 percent.
Using test optimization tooling,
the organization determines that a
small subset of the tests achieves
a collective code coverage of at
least 85 percent. Now the team
has a decision to make. If it wants
to reduce the cost of executing
automated tests, it can reduce its
nightly automated test suite by
about 78 percent and still achieve
code coverage goals. Perhaps it
chooses to run the optimal set of
tests nightly and the full set of
tests only once a week. Whatever
is decided, the test optimization
tooling can analyze the data to
help make an informed decision.

The Way Forward
DevOps has arrived in the z Systems development
world to enable continuous delivery of SoR applications. Shift-left testing is a key DevOps practice that
improves quality and reduces risk over the course
of a software project's release cycle. Between the
established practices and emerging tools for test

automation, it has never
been easier to adopt shift-left
testing.
Jonathan Gellin is a senior software
engineer in the z Systems software
organization at IBM.

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Table of Contents for the Digital Edition of IBM Systems Magazine, Mainframe - March/April 2017

Table of Contents
Editor's Desk: Ahead of the Times
Techbits: Cognitive Customer Engagement
Partner PoV: Keep Data Out of Danger: Use the right tools to implement your large-object strategy
Currents: A Layered Approach: Using microservices on z Systems with CICS improves flexibility and reliability
IT Today: Choosing the Right Cloud: What to consider when using a managed service provider
R&D: Move Along: IBM Research and partners help traffic run smoothly in Madrid
Trends: How to Improve Your Sales Skills: Tips for techies on showing the value of their services
Feature: Strength in Collaboration: Linux on z Systems accelerates new and traditional workloads
Feature: Community Computing: The Open Mainframe Project expands educational opportunities for Linux on z Systems users
TECH Showcase: Shift-Left Testing Improves Success: Automated testing in the DevOps cycle improves quality and reduces risk
Tech Corner: Database Development: IBM DB2 V12 enhances and integrates data for cloud, mobile and analytics
Solutions: SMART TS XL V8.0, IN-COM Data Systems; Tubes, Macro 4; CleverView for TCP/IP on Linux V2.5, AES
Stop Run: A Global View: Computer science and astrophysics prove a natural fit
Reference Point - Global Events, Education, Resources for Mainframe
2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - March/April 2017 - Intro
IBM Systems Magazine, Mainframe - March/April 2017 - Cover1
IBM Systems Magazine, Mainframe - March/April 2017 - Cover2
IBM Systems Magazine, Mainframe - March/April 2017 - 1
IBM Systems Magazine, Mainframe - March/April 2017 - Table of Contents
IBM Systems Magazine, Mainframe - March/April 2017 - 3
IBM Systems Magazine, Mainframe - March/April 2017 - 4
IBM Systems Magazine, Mainframe - March/April 2017 - 5
IBM Systems Magazine, Mainframe - March/April 2017 - Editor's Desk: Ahead of the Times
IBM Systems Magazine, Mainframe - March/April 2017 - 7
IBM Systems Magazine, Mainframe - March/April 2017 - Techbits: Cognitive Customer Engagement
IBM Systems Magazine, Mainframe - March/April 2017 - 9
IBM Systems Magazine, Mainframe - March/April 2017 - 10
IBM Systems Magazine, Mainframe - March/April 2017 - 11
IBM Systems Magazine, Mainframe - March/April 2017 - Partner PoV: Keep Data Out of Danger: Use the right tools to implement your large-object strategy
IBM Systems Magazine, Mainframe - March/April 2017 - 13
IBM Systems Magazine, Mainframe - March/April 2017 - Currents: A Layered Approach: Using microservices on z Systems with CICS improves flexibility and reliability
IBM Systems Magazine, Mainframe - March/April 2017 - 15
IBM Systems Magazine, Mainframe - March/April 2017 - 16
IBM Systems Magazine, Mainframe - March/April 2017 - 17
IBM Systems Magazine, Mainframe - March/April 2017 - IT Today: Choosing the Right Cloud: What to consider when using a managed service provider
IBM Systems Magazine, Mainframe - March/April 2017 - 19
IBM Systems Magazine, Mainframe - March/April 2017 - 20
IBM Systems Magazine, Mainframe - March/April 2017 - 21
IBM Systems Magazine, Mainframe - March/April 2017 - R&D: Move Along: IBM Research and partners help traffic run smoothly in Madrid
IBM Systems Magazine, Mainframe - March/April 2017 - 23
IBM Systems Magazine, Mainframe - March/April 2017 - Trends: How to Improve Your Sales Skills: Tips for techies on showing the value of their services
IBM Systems Magazine, Mainframe - March/April 2017 - 25
IBM Systems Magazine, Mainframe - March/April 2017 - 26
IBM Systems Magazine, Mainframe - March/April 2017 - 27
IBM Systems Magazine, Mainframe - March/April 2017 - Feature: Strength in Collaboration: Linux on z Systems accelerates new and traditional workloads
IBM Systems Magazine, Mainframe - March/April 2017 - 29
IBM Systems Magazine, Mainframe - March/April 2017 - 30
IBM Systems Magazine, Mainframe - March/April 2017 - 31
IBM Systems Magazine, Mainframe - March/April 2017 - 32
IBM Systems Magazine, Mainframe - March/April 2017 - 33
IBM Systems Magazine, Mainframe - March/April 2017 - Feature: Community Computing: The Open Mainframe Project expands educational opportunities for Linux on z Systems users
IBM Systems Magazine, Mainframe - March/April 2017 - 35
IBM Systems Magazine, Mainframe - March/April 2017 - 36
IBM Systems Magazine, Mainframe - March/April 2017 - 37
IBM Systems Magazine, Mainframe - March/April 2017 - 38
IBM Systems Magazine, Mainframe - March/April 2017 - 39
IBM Systems Magazine, Mainframe - March/April 2017 - 40
IBM Systems Magazine, Mainframe - March/April 2017 - 41
IBM Systems Magazine, Mainframe - March/April 2017 - 42
IBM Systems Magazine, Mainframe - March/April 2017 - 43
IBM Systems Magazine, Mainframe - March/April 2017 - 44
IBM Systems Magazine, Mainframe - March/April 2017 - TECH Showcase: Shift-Left Testing Improves Success: Automated testing in the DevOps cycle improves quality and reduces risk
IBM Systems Magazine, Mainframe - March/April 2017 - 46
IBM Systems Magazine, Mainframe - March/April 2017 - 47
IBM Systems Magazine, Mainframe - March/April 2017 - 48
IBM Systems Magazine, Mainframe - March/April 2017 - 49
IBM Systems Magazine, Mainframe - March/April 2017 - Tech Corner: Database Development: IBM DB2 V12 enhances and integrates data for cloud, mobile and analytics
IBM Systems Magazine, Mainframe - March/April 2017 - 51
IBM Systems Magazine, Mainframe - March/April 2017 - 52
IBM Systems Magazine, Mainframe - March/April 2017 - 53
IBM Systems Magazine, Mainframe - March/April 2017 - 54
IBM Systems Magazine, Mainframe - March/April 2017 - Solutions: SMART TS XL V8.0, IN-COM Data Systems; Tubes, Macro 4; CleverView for TCP/IP on Linux V2.5, AES
IBM Systems Magazine, Mainframe - March/April 2017 - Stop Run: A Global View: Computer science and astrophysics prove a natural fit
IBM Systems Magazine, Mainframe - March/April 2017 - Cover3
IBM Systems Magazine, Mainframe - March/April 2017 - Cover4
IBM Systems Magazine, Mainframe - March/April 2017 - Reference Point - Global Events, Education, Resources for Mainframe
IBM Systems Magazine, Mainframe - March/April 2017 - 2017 Mainframe Solutions Edition
IBM Systems Magazine, Mainframe - March/April 2017 - SE2
IBM Systems Magazine, Mainframe - March/April 2017 - SE3
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