Table of Contents
JBehave
JBehave is a tool for Behavior Driven Development(BDD).
What is BDD ?
BDD is a Software development based on TDD which is
- Developed by Dan North
- Addresses problems with TDD
What problems does JBehave address?
Programmers wanted to know:
- “Where to start”
- “What to test and what not to test”
- “How much to test” at one time
- “What to call” the tests
- “How to understand why a test fails”
Philosophy of BDD
- “Test method names should be sentences”
- “Simple sentence template”
- The class should do something”
- “An expressive test name is helpful”
- What behaviors should be implemented?
- Requirements determine the behaviors
- Standard language (Given, when, then)
Getting Started with JBehave
- “Download the JBehave core jar”
http://mvnrepository.com/artifact/org.jbehave/jbehave-core/3.0-rc1
- Put the jar file in your project workspace
- Create and run a simple scenario
- Try to replicate someone else’s work first
Download scenarios.tgz:
https://wiki.umn.edu/pub/UmmCSci3601s10/SettingUpJBehaveInEclipse/scenarios.tgz
Create and Run a Scenario
Three files needed:
- Scenario text file with given-when-then format
- Java/file class to extend Scenario file
- Java steps file for the method shells
Sample scenario text file (make_pancakes_scenario)
Scenario: Making pancakes in a skillet
Given some pancake batter
And a hot frying pan
When I pour the batter into the frying pan
And wait for 2 minutes or until the sides are dry
And flip the pancake over
And wait for 1 minute
Then I get a cooked pancake
Sample Java file/class (MakePancakesScenario.java)
package com.cse.simple.stories;
import org.jbehave.scenario.Scenario;
public class MakePancakesScenario extends Scenario {
public MakePancakesScenario() {
super (new PancakeCookingSteps() );
}
}
Sample Java steps file(1) (PancakeCookingSteps.java)
package com.cse.simple.steps;
import org.jbehave.core.annotations.Given;
import org.jbehave.core.annotations.Then;
import org.jbehave.core.annotations.When;
public class PancakeCookingSteps {
@Given(“some pancake batter”)
public void howMuchBatter() {
// add code for amount of batter
}
@Given(“hot frying pan”)
public void heatFryingPan() {
// add code to determine heat
}
@When(“I pour the batter into the frying pan”)
public void startCooking() {
// add code to start cooking
}
// continued on next slide
Sample Java steps file(2) (PancakeCookingSteps.java)
// continued from previous slide
@When(“wait for 2 minutes or until the sides are dry”)
public void cookFirstSide() {
// add code to cook first side
}
@When(“flip the pancake”)
public void flipPancake() {
// add code to flip pancake
}
@When(“wait for 1 minute”)
public void cookSecondSide() {
// add code to cook second side
}
@Then(“I get a cooked pancake”)
public void putPancakeOnPlate() {
// add code to move pancake from frying pan to plate
}
}
Test class files with JUnit
Follow the steps in the JUnit_Testing pdf
- https://wiki.uta.edu/display/serc/CSE-5324+Tools
- Generate a JUnit test case template
- Update the test file with test cases
- Run the test cases with JUnit
