By Jeff Langr
Grasp Java 5.0, object-oriented layout, and Test-Driven improvement (TDD) by way of studying them jointly. Agile Java weaves all 3 right into a unmarried coherent method of construction specialist, strong software program structures. Jeff Langr exhibits precisely how Java and TDD combine through the complete improvement lifecycle, aiding you leverage state-of-the-art quickest, most productive improvement ideas from the very outset.Langr writes for each programmer, even people with very little event with Java, object-oriented improvement, or agile equipment. He exhibits tips to translate oral necessities into functional checks, after which find out how to use these exams to create trustworthy, high-performance Java code that solves genuine difficulties. Agile Java does not simply educate the middle gains of the Java language: it provides coded try out examples for every of them. This TDD-centered procedure does not simply bring about greater code: it offers strong suggestions that can assist you research Java way more quickly. using TDD as a studying mechanism is a landmark departure from traditional educating concepts.
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Additional info for Agile Java: Crafting Code with Test-Driven Development
In order to do so, you must tell Java where to find any other classes that StudentTest references. TestCase. This class can be found in a packaged format known as a JAR (Java ARchive) file. TestCase can be found also contains many other classes that comprise the JUnit framework. I discuss JAR files in more depth in Additional Lesson III. For now, you only need to understand how to tell Java where to find the JUnit JAR file. You do so using the classpath. 41 42 More on the Classpath Understanding the classpath can be one of the more confusing aspects of working with Java for beginning developers.
TestRunner. TestRunner StudentTest You once again specify the classpath, this time using the abbreviated keyword -cp. Not only does the Java compiler need to know where the JUnit classes are, but the Java VM also needs to be able to find these classes at runtime so it can load them up as needed. , representing the current directory. class: If a directory is specified instead of a JAR filename, Java scans the directory for class files as necessary.  You'll note I use phrases such as "Java does this" often.
GetName(); assertEquals("Jane Doe", studentName); } } 52 53 The third line of code (statement) is used to prove, or assert, that everything went well during the execution of the first two statements. This is the "test" portion of the test method. To paraphrase the intent of the third statement: You want to ensure that the student's name is the string literal "Jane Doe". In more general terms, the third statement is an assertion that requires the first argument to be the same as the second. This third line is another message send, much like the right-hand side of the second statement.
Agile Java: Crafting Code with Test-Driven Development by Jeff Langr