[Db-derby Wiki] Update of "IntroToJUnit" by JohnHEmbretsen

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The following page has been changed by JohnHEmbretsen:
http://wiki.apache.org/db-derby/IntroToJUnit

The comment on the change is:
now using java parser (color coding) for code examples

------------------------------------------------------------------------------
  The method to test must start with the prefix 'test', e.g. 'testAddMethod'.
  
  Example of the simplest test case, containing only one test:
- {{{
+ {{{#!java
  package junitdemo;
  
  import junit.framework.TestCase;
@@ -187, +187 @@

  class. 
  
  ==== JUnit Fixture class with a Main method ====
- {{{
+ {{{#!java
  package junitdemo;
  
  import junit.framework.TestCase;
@@ -305, +305 @@

  
  ==== Running a Suite of Tests ====
  {{{
+ #!java
  package junitdemo;
  
  import junit.framework.Test;
@@ -376, +377 @@

  to this:
  
  {{{
+ #!java
  	// only adds two tests to the suite
  	public static Test suite() {
  		TestSuite suite = new TestSuite();
@@ -403, +405 @@

  own suite and adds tests from another class too.
  
  {{{
+ #!java
  package junitdemo;
  
  import junit.framework.Test;
@@ -433, +436 @@

  
  '''SuiteTest1J!UnitTest'''
  {{{
+ #!java
  package junitdemo;
  
  import junit.framework.Test;
@@ -493, +497 @@

  '''SuiteTest2J!UnitTest'''
  
  {{{
+ #!java
  package junitdemo;
  
  import junit.framework.Test;
@@ -548, +553 @@

  
  Overloaded for almost all primitive data types and the Object arguments.
  {{{
+ #!java
  double expected = java.lang.StrictMath.acos(testArcValues[i]);
  double rValue = executeValues("ACOS", testArcValues[i]);
  assertEquals(expected, rValue, 0.0);
@@ -557, +563 @@

  
  Takes a boolean argument. Use this when the expected result is true.
  {{{
+ #!java
  // verify that autocommit is on
  assertTrue(getConnection().getAutoCommit());
  }}}
@@ -566, +573 @@

  
  Takes a boolean argument.  Use this when the expected result is false.
  {{{
+ #!java
  // there should be no more rows in this ResultSet
  assertFalse(rs.next());
  }}}
@@ -575, +583 @@

  Takes an object with an optional second argument, the String message. Use this when you expect an object to be null.
  
  {{{
+ #!java
  // expecting SQL NULL in column 2 of this row
  assertNull("Second column should be null", rs.getString(2));
  }}}
@@ -583, +592 @@

  
  Takes an object with an optional second argument, the String message. Use this when you want to accept anything but null.
  {{{
+ #!java
  String importantText = rs.getString(1);
  assertNotNull("Fail: Important text is null! ", importantText);
  }}}
@@ -591, +601 @@

  
  Takes two objects with an optional third argument, the String message.
  {{{
+ #!java
  s2 = new String("string1");
  assertNotSame("Fail: string1 is the same as s2", "string1", s2)
  }}}
@@ -603, +614 @@

  action that should throw an exception, and you want the test to fail if 
  no exception was thrown.
  {{{
+ #!java
  try {
       // for the value TWO_RADIANS, this method should throw
       // an SQLException in Derby