This document discusses how adopting test-first development strategies like Test Driven Development (TDD) and Behavior Driven Development (BDD) can help organizations build a more customer-centric culture. It emphasizes that in today's competitive environment, focusing on agile practices, DevOps, and test-first methodologies gives companies an edge over those that do not. The document outlines how the organization matured in applying TDD and BDD, from initial training and pair programming to integrating automated testing into their development process and using examples from feature files as test cases.

1. BE CUSTOMER CENTRIC
WITH
TEST FIRST DEVELOPMENT
By
Mamata Raote
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2. WHAT IS CUSTOMER CENTRIC
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CUSTOMER LIFETIME VALUE
(CLV) -MEASURES HOW MUCH PROFIT
YOUR CUSTOMERS WILL GENERATE DURING
THEIR RELATIONSHIP WITH YOUR
COMPANY
CUSTOMER
SATISFACTION(CSAT)
GIVES YOU A CLEAR VIEW OF HOW
CUSTOMERS LIKE THE EXPERIENCE WITH
YOUR BRAND AND ITS PRODUCTS AND
SERVICES
CUSTOMER CHURN RATE
REVEALS HOW MANY OFYOUR
CUSTOMERS HAVE STOPPED USING
YOUR PRODUCTS OR SERVICES
When your company sees the customer experience as
Absolutely core to what you do, you have a customer-
centric culture.
How we measure customer centricity?

3. 3
Conclusions of 12 years of Service Delivery Gap Polls and Surveys, 2002-2014
The Service Delivery Gap You Are Missing (linkedin.com)
WHAT’S THE
REALITY?
Business misunderstood
Unawareness of Big Picture
Product not as per customer expectations
System got sour
Loss of customer trust

4. HOW WE STARTED THINKING TEST-FIRST ?
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5. BEHAVIOR DRIVEN DEVELOPMENT (DAN NORTH-2006)
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• BDD is a collaborative approach to software development that
bridges the communication gap between business and IT.
HOW
• The primary purpose of BDD is – “Building the right software” Collaboration Predictability
Requirements
Clarity
Quality
Gherkin – with example mapping
WHY BDD?
Feature: User trades stocks
As a user I should be able to sell my stocks online
Scenario: User requests a sell before close of trading
Given I have 100 shares of MSFT stock
And I have 150 shares of APPL stock
And the time is before close of trading
When I ask to sell 20 shares of MSFT stock
Then I should have 80 shares of MSFT stock
And I should have 150 shares of APPL stock
And a sell order for 20 shares of MSFT stock should
have been executed

6. HOW DID WE APPLY BDD?
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Step Definition Contains definition of the steps written in feature file.
@Given("I have {int} shares of {string} stock")
public void i_have_shares_of_stock(Integer int1, String string) {
//here code to validate this steps is written
}
@Given("the time is before close of trading")
public void the_time_is_before_close_of_trading() {
//here code to validate this steps is written
}
Feature: User trades stocks
Scenario: User requests a sell before close of trading
Given I have 100 shares of “MSFT “stock
And I have 150 shares of “APPL” stock
And the time is before close of trading

7. 7
HOW WE MATURED IN BDD?
We started addressing from
user story refinement
sessions with 3 Amigos
With collaborative
approach we documented
acceptance scenarios in
Given When Then Format
with example mapping
technique.
Examples in scenario
became test data for testing
team and input for
development team in their
unit test cases.
Initially testing team started
with manual test cases
aligning with scenarios in
each user story.
Developers aligned their
development to satisfy each
scenario for user story.
Adopted automation by
writing automation scripts
in step definition file for
each feature file.
While discussing new
requirements also refined
existing feature which we
enhanced and documented
it in feature file.
Automated existing feature
scenarios too.
Eventually entire legacy
feature was automated with
cucumber steps.
Team became more
comfortable to add new
enhancement as outcome
was more predictable than
before.

8. TEST DRIVEN DEVELOPMENT , TDD (ORIGINAL DEVELOPER:KENT BECK-LATE 1990S)
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WHAT: Test-Driven Development (TDD) is a technique for building software
that guides software development by writing tests-Martin Fowler
HOW
WHY TDD ?
Good
Design
Less
Defects
Better test
quality
Lesser
Time
Easy to
Refactor
More
Focus
Tests act as documentation for developers
@Test
public void shouldReturnStockQuantityForGivenStockName(){
int quantity = stockService.getStockQuantityByStockName("APPL");
Assert.assertEquals(100, quantity);
}
@Test
public void shouldReturnZeroStockQuantityForInvalidStockName(){
int quantity = stockService.getStockQuantityByStockName(“XYZ");
Assert.assertEquals(0, quantity);
}

9. HOW DID WE APPLY TDD?
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Trained team on following technical skills:
• Art of Unit Testing
• TDD with 3 rules
• Test Doubles
• Refactoring skills
Best practices team followed:
How we matured in TDD?
Map unit tests to
user stories
Readable unit
tests with right
validation
Failed unit test
wont promote
build
Bugs to be fixed
with test written
first
Dependency
discovery
should result in
tests
Started with unit testing
Followed pair programming
Refactored legacy code by adding tests
Every new code started with test first
Enhanced refactoring skills
Imbibed clean code principles

10. TDD VS BDD ?
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Spec
Test
Code
BDD is Outside in TDD is Inside out
Its not TDD vs BDD but BDD with TDD
Arrive at test pyramid for each story

11. SUMMARY
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Test-first is customer-centric
Re-engineering the organization’s internal processes is
about adopting a customer centric Agile culture.
In current competitive world, organizations that focus on
agile, DevOps, and test-first strategies such as TDD and
BDD will have a competitive edge over those that do not.
That's why test-first methodologies are more important
than ever

12. REFERENCES
• https://dannorth.net/2012/05/31/bdd-is-like-tdd-if/
• https://testguild.com/wow-customers-tdd-bdd/
• https://www.superoffice.com/blog/how-to-create-a-customer-centric
strategy/#:~:text=Customer%2Dcentric%20is%20an%20approach,profit%
20and%20gain%20competitive%20advantage
• https://www.linkedin.com/pulse/20140602114924-13943480-the-service-
delivery-gap-you-are-missing/
• https://www.i-scoop.eu/customer-centricity/
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13. THANK YOU
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