Instructor Notes for 2 Days Java For Testers Training

Transcription

1 Contents Instructor Notes for 2 Days Java For Testers Training 1 Rough Timings Day Rough Timings Day Expanded Timings Demo - Create ageallowsservice Method Demo: Create a concatenated reporting String Demo - using replaceall to create our own Demo Create Constructor Rough Timings Day (Demo) For Each and Storing Customers (Demo) Create a PasswordValidator Questions - PasswordValidator good? DEMO - Randomly Create a Customer name Instructor Notes for 2 Days Java For Testers Training Wannaflex : Days start at 09:00 and finish at 16:00 with 1 hour for optional coding and exercise practice Acrobat Full Screen - cmd+l Mac Zoom - alt+cmd++ alt+cmd+- IntelliJ full screen - ctrl+cmd+f Check: webpage updated downloaded exercises downloaded answers downloaded Java Libraries source 1

2 Rough Timings Day 1 09:00 Logistics, Introduction - up to 15 short example test 09:15 Demo of creating some code and 15 classes this is what JavaClasses with JUnit 09:30 Double Check Installation mins (inc ex) 09:50 Basics - to Example Test 15 mins 10:05 ExampleTest Exercises 15 mins 10:20 Basics - to end of this section 15 mins including the fixbrokencode exercise 10:35 Class and Object Basics 20 mins 10:55 break 15 mins 11:10 Objects, Methods, Fields, 15 mins (end demo) Properties 11:25 Objects, Methods, Fields, 15 mins Properties - Exercise 11:40 Primitive Types 30 mins (inc 5+15 ex) 12:10 Conditions If Else 45 mins ( inc 15 mins talk/demo ( ex)) This section has 2 exercise sections Create the ageallowsservice method exercise (10 mins) Continue with Exercises at end (20 mins) 12:30 lunch - interrupts above 1 hour 13:30 Finish Conditions If Else 20 mins 13:50 Strings 1 hour Strings: 10 first exercise 5 rewrite getreport exercise 15 create own template exercise 14:50 Break 15 2

3 15:05 Exceptions Talky Bits 15 15:20 Exceptions exercises 20 15:40 Constructors Chat 15 15:55 Constructors Exercises 30 16:25 Exercises & Case Studies till end Rough Timings Day 2 09:00 Collections 50 mins (20 chat, 30 exercises) 09:50 Junit before after 15 mins chat, 15 minutes exercises 10:20 For Loop + Character 20 mins for chat demo, 30 mins exercise 10:40 break 15 mins 10:55 exercises for for loop 30 mins 11:25 Java Libraries Examples 1 hour 12:25 Lunch 1 hour 13:30 Arrays & Random 15 min demo & 30 mins exercise 14:15 Automation & Abstraction layers 1 hour 15:15 break 15 mins 15:30 My first project 15 mins 15:45 Exercises & Case Studies till end 3

4 Expanded Timings 09:00 Logistics, Introduction - up to short example test 15 09:15 Demo of creating some code and classes 15 Show: packages imports creating a Test class creating a class Domain Object instantiating a domain object properties setters, getters methods variables using a test library to do stuff WebPage, track visits in src\test\java in package com.javafortesters.course.examples.demo use IDE to create a class WebPageTrackTest explain package and public class explain { add the todo.txt as comments to guide the demo create method called cancreatewebpageobject explain methods are code that we can run demo right click and run method CountableWebPage webpage; Alt+Enter to create the CountableWebPage class create a method on CountableWebPage called numberofvisits() by Assert.assertEquals(0, webpage.numberofvisits()); Alt+Enter to import import org.junit.assert; initialize/instantiate webpage with new CountableWebPage Alt+Enter to create numberofvisits method create a method on CountableWebPage called visit() webpage.visit(); implement visit by creating a countofvisits field variable public void visit() { // TODO visit the page countofvisits = countofvisits+1; amend the test to assert on visits 4

5 assert that visits increases when we call it Assert.assertEquals(1, webpage.numberofvisits()); create a URL property drive with Assert.assertEquals(" webpage.geturl()); call with webpage.seturl(" create as a URL Property public void seturl(string url) { this.url = url; public String geturl() { return url; Final WebPageTrackTest package com.javafortesters.course.examples.demo; import org.junit.assert; import org.junit.test; public class WebPageTrackTest public void cancreatewebpageobject(){ CountableWebPage webpage = new CountableWebPage(); webpage.seturl(" Assert.assertEquals(" webpage.geturl()); Assert.assertEquals(0, webpage.numberofvisits()); webpage.visit(); Assert.assertEquals(1, webpage.numberofvisits()); And Final CountabelWebPage.java package com.javafortesters.course.examples.demo; import java.io.ioexception; import java.net.httpurlconnection; import java.net.url; 5

6 public class CountableWebPage { private int countofvisits=0; private String url; public int numberofvisits() { return countofvisits; public void visit() { try { HttpURLConnection connection = (HttpURLConnection) new URL(this.url).openConnection(); int statuscode = connection.getresponsecode(); connection.getinputstream(); if(statuscode==200){ countofvisits = countofvisits+1; else{ System.out.println("Could not get " + url); catch (IOException e) { e.printstacktrace(); public String geturl() { return url; public void seturl(string url) { this.url = url; Depending on time could - explain basic principles of abstraction - i.e. visit could change to use Selenium or... in built HttpMessageSender class from case study import com.javafortesters.course.casestudy.http.httpmessagesender; HttpResponse response = new HttpMessageSender(this.url).get(""); if(response.statuscode==200){ 6

7 System.out.println(response.raw()) countofvisits = countofvisits+1; else{ System.out.println("Could not get " + url + " received " + response.statuscode); To use WebDriver I would have to add selenium as a dependency: <dependency> <groupid>org.seleniumhq.selenium</groupid> <artifactid>selenium-java</artifactid> <version> </version> </dependency> WebDriver driver = new SafariDriver(); driver.get(this.url); driver.quit(); To better replicate functionality: try { driver.get(this.url); countofvisits = countofvisits+1; catch(exception e){ System.out.println("Could not get " + url + " received " + e.getmessage(); e.printstacktrace(); 7

8 09:30 Double Check Installation mins (inc ex) 09:50 Basics - to Example Test 15 mins 10:05 ExampleTest Exercises 15 mins 10:20 Basics - to end of this section including the fixbrokencode exercise 15 mins 10:35 Class and Object Basics 20 mins 10:55 break 15 mins 11:10 Objects, Methods, Fields, Properties 15 mins (end demo) 11:25 Objects, Methods, Fields, Properties - Exercise 15 mins 11:40 Primitive Types 30 mins (inc 5+15 ex) 8

9 12:10 Conditions If Else 45 mins ( inc 15 mins talk/demo ( ex)) This section has 2 exercise sections Create the ageallowsservice method exercise (10 mins) Continue with Exercises at end (20 mins) Demo - Create ageallowsservice Method we want to demo the removing of unnecessary code later so we create it with unnecessary code public boolean ageallowsservice() { boolean isofagethatallowsservice; if(age>16){ isofagethatallowsservice = true; else{ isofagethatallowsservice = false; return isofagethatallowsservice; 12:30 lunch - interrupts above 1 hour 13:30 Finish Conditions If Else 20 mins 13:50 Strings 1 hour Strings: 10 first exercise 5 rewrite getreport exercise 15 create own template exercise Demo: Create a concatenated reporting String make sure and put the string output in the wrong order so that we pass the contains assert but fail the actual output requirement 9

10 public String getreport() { return "Customer: " + name + " and is " + age + " years old" + " lives at " + address ; Demo - using replaceall to create our own template public String fromtemplate(string template) { String from=template; if(from.contains("!name!")){ from = from.replaceall("!name!", name); if(from.contains("!balance!")){ from = from.replaceall("!balance!", String.valueOf(balance)); return from; Also explain using String.format from = from.replaceall("!balance!", String.format("%.1f",balance)); And different formats "%08.1f" - zero padding "%8.1f" - space padding 14:50 Break 15 15:05 Exceptions Talky Bits 15 15:20 Exceptions exercises 20 15:40 Constructors Chat 15 Demo Create Constructor Constructor that will be created is: public Customer(String name, int age, String address) { this.name = name; 10

11 this.age= age; this.address=address; gradually add the this.name etc. as we add assertions in the test 15:55 Constructors Exercises 30 16:25 Exercises & Case Studies till end 11

12 Rough Timings Day 2 09:00 Collections 50 mins (20 chat, 30 exercises) (Demo) For Each and Storing Customers End result of the exercise - it is basically the customers.add that we are public void fillacollectionofcustomers(){ Collection<Customer> customers = new ArrayList<>(); // Exercise: add five customers where two // of the customers are over 30 years old customers.add(new Customer("bob32", 32, "Bob Town")); customers.add(new Customer("bob33", 33, "Bob Town")); customers.add(new Customer("bob16", 16, "Bob Town")); customers.add(new Customer("bob17", 17, "Bob Town")); customers.add(new Customer("bob18", 18, "Bob Town")); // Exercise: Uncomment the following line and the test should pass Assert.assertEquals(5, customers.size()); // Uncomment out the following lines of code // and the test should still pass int customersover30 = 0; for(customer acustomer : customers){ if(acustomer.getage() > 30){ customersover30++; Assert.assertEquals(2, customersover30); remember to show different ways of creating the customer Customer customertoadd = new Customer(); customertoadd.setage(32); customers.add(customertoadd); Take the opportunity to show return this; from setage to allow customers.add(new Customer().setAge(32)); requires amending setage 12

13 public Customer setage(int age) { this.age = age; return this; Explain fluent programming a little. 13

14 09:50 Junit before after 15 mins chat, 15 minutes exercises 10:20 For Loop + Character 20 mins for chat demo, 30 mins exercise (Demo) Create a PasswordValidator The final PasswordValidator class created from demo will look like: public class PasswordValidator { private final String password; public PasswordValidator(String password) { this.password = password; public int countuppercase() { int countofchars = 0; for (int position = 0; position < password.length(); position++) { if (Character.isUpperCase(password.charAt(position))) { countofchars++; return countofchars; If I create a private no argument constructor private PasswordValidator(){ this.password=null; Then it prevents any code instantiating a PasswordValidator object without setting a password i.e. the following will not compile PasswordValidator validator = new PasswordValidator(); Questions - PasswordValidator good? we could have a Password object that throws an exception if not valid in constructor? we could have a PasswordCreator object 14

15 setpassword should probably throw an exception if not valid 15

16 10:40 break 15 mins 10:55 exercises for for loop 30 mins 11:25 Java Libraries Examples 1 hour 12:25 Lunch 1 hour 13:30 Arrays & Random 15 min demo & 30 mins exercise DEMO - Randomly Create a Customer name Don t do the full exercise: just fill the arrays randomly pick items from the array System.out.println the name so we can see the generation String []firstnames = {"bob", "eris"; String []lastnames = {"dobbs", "discord", "Campbell"; Collection<Customer> customers = new ArrayList<>(); Random rnd = new Random(); for(int nameid=0; nameid<100; nameid++) { String firstname=firstnames[rnd.nextint(firstnames.length)]; String lastname=lastnames[rnd.nextint(lastnames.length)];; String name = String.format("%s %s", firstname, lastname); System.out.println(name); 14:15 Automation & Abstraction layers 1 hour 15:15 break 15 mins 15:30 My first project 15 mins 15:45 Exercises & Case Studies till end 16