1. Testing on Rails

2. Testing on Rails

Unit Tests

• Models

Functional Tests

• Controllers

• Views

Integration Tests

• Application

Fixtures

• Data to support the Tests

3.

• Every Application get's tested, eventually.

Why Test? 4. Why Automate Tests?

Weareprogrammers, right?

Computer's are great at performing mundane repeatable tasks.

Automated Regression Testing.

Refactoring is easier.

5. Additional Benefits

• Writing Tests makes better Programmers.

• Automated Tests make better Applications.

Tests are a great warm-up / practice area.

• • With Unit Tests,...you actually stand a chance of producing a product with close to zero defects.-The Pragmatic Programmer

All the beautiful people write unit tests.

6. My Favorite Mistake

# Warning: The database defined as'test' will be erasedand

# re-generated from your development database when you run 'rake'.

# Do not set this db to the same as development or production.

test:

adapter: mysql

database: bathroom_attendant_test

username: root

password:

host: localhost

7. Unit Testing Models

Test Calculations

Test Validations

Test Callbacks

8. Methods Available

assertboolean

assert_equalexpected, actual

assert_raise*args

assert_instance_ofklass, object

assert_nilobject

assert_validobject

9. Error vs. Failure

config

1) Error:

test_truth(AttendantTest):

Mysql::Error: #28000Access denied for user 'root'@'localhost' (using password: NO)

1) Failure:

test_truth(AttendantTest) [./test/unit/attendant_test.rb:8]:

is not true.

2) Error:

test_truth(QualificationTest):

NameError: undefined local variable or method `duh' for #

"