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Method get_row() returns a PL/SQL record (a row) from a relational table or an instance of an object TYPE (a row) from an object table, based on the criteria specified in the record or object passed to the method. As the programmer, it s your responsibility to code the method to retrieve by the primary key and any other unique keys defined for the table in question. Then, to use this method, follow these steps: 1. Set column or attribute values in a corresponding PL/SQL record or object instance for only those columns or attributes that are used in a particular primary or unique key constraint. 2. Pass the PL/SQL record or object instance to the method. get_row() then returns a matching row from the database if a matching row exists; otherwise, it returns a NULL PL/SQL record or object instance. This method replaces a singleton SQL SELECT statement with a parametric method call based on a set of primary or unique key values. We never need to code that SQL statement ever again. Where s that unhappy SQL programmer now The following is an example of the get_row() method from content table package LOGICAL_ WORKPLACE_TS: FUNCTION get_row( air_logical_workplace return r_logical_workplace

TestNG also provides a mechanism for declaring dependencies amongst test methods and avoiding being overwhelmed by what Beust refers to as the failure cascade trauma in JUnit when it reports all the failures of dependent tests as well as the root failure. The Test annotation can take a parameter of dependsOnMethods, which takes a comma-separated list of methods. Similarly, you can declare method dependencies on a group via the dependsOnGroups parameter, which takes a comma-separated list of groups. TestNG will guarantee that all of the methods in a dependent group are executed before the method.

LOGICAL_WORKPLACE_T%ROWTYPE) LOGICAL_WORKPLACE_T%ROWTYPE is LOGICAL_WORKPLACE_T%ROWTYPE;

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print 'Received redundant parameters:', others return pow(x, y) def interval(start, stop=None, step=1): 'Imitates range() for step > 0' if stop is None: # If the stop is not supplied... start, stop = 0, start # shuffle the parameters result = [] i = start # We start counting at the start index while i < stop: # Until the index reaches the stop index... result.append(i) # ...append the index to the result... i += step # ...increment the index with the step (> 0) return result Now let s try them out: >>> print story(job='king', name='Gumby') Once upon a time, there was a king called Gumby. >>> print story(name='Sir Robin', job='brave knight') Once upon a time, there was a brave knight called Sir Robin. >>> params = {'job': 'language', 'name': 'Python'} >>> print story(**params) Once upon a time, there was a language called Python. >>> del params['job'] >>> print story(job='stroke of genius', **params) Once upon a time, there was a stroke of genius called Python. >>> power(2,3) 8 >>> power(3,2) 9 >>> power(y=3,x=2) 8 >>> params = (5,) * 2 >>> power(*params) 3125 >>> power(3, 3, 'Hello, world') Received redundant parameters: ('Hello, world',) 27 >>> interval(10) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] >>> interval(1,5) [1, 2, 3, 4] >>> interval(3,12,4) [3, 7, 11] >>> power(*interval(3,7)) Received redundant parameters: (5, 6) 81

begin if air_logical_workplace.logical_workplace_id is not NULL then --pl('retrieve the row by the primary key'); select * into r_logical_workplace from LOGICAL_WORKPLACE_T where logical_workplace_id = air_logical_workplace.logical_workplace_id; elsif air_logical_workplace.id_context is not NULL then --pl('retrieve the row by the id_context unique key'); select * into r_logical_workplace

TestNG allows test parameters to be passed from the testng.xml file or via the Parameters and DataProvider annotations. The org.testng.annotations.Parameters annotation applies to the org.testng.annotations.Test and org.testng.annotations.Configuration parameters. For example, if you wanted to have a set of database-specific tests, you could define the database parameters in the textng.xml file as shown in Listing 8-11. Listing 8-11. TestNG Parameterized Configuration <!DOCTYPE suite SYSTEM "http://beust.com/testng/testng-1.0.dtd" > <suite name="Test Suite" <parameter name="url" value="jdbc:mysql://localhost/test" /> <parameter name="driver" value="com.mysql.jdbc.Driver" /> <parameter name="username" value="user" /> <parameter name="password" value="pass" /> <test name="DBTest"> ... </test> </suite> To use the parameters in your test code simply use the parameters annotation as shown in Listing 8-12. Listing 8-12. Using TestNG Parameters in Code Connection connection = null; @Parameters({ "url", "driver", "username", "password" }) @Configuration(beforeTestClass = true) private void initializeDB(String url, String driver, String username, String password) {

from LOGICAL_WORKPLACE_T where id_context = air_logical_workplace.id_context; else --pl('retrieve the row by the code, name, and active_date'); select * into r_logical_workplace from LOGICAL_WORKPLACE_T where code = air_logical_workplace.code and name = air_logical_workplace.name and active_date = air_logical_workplace.active_date; end if; return r_logical_workplace; exception when NO_DATA_FOUND then raise; when OTHERS then raise_application_error(-20001, SQLERRM|| ' on select LOGICAL_WORKPLACE_T'|| ' in LOGICAL_WORKPLACE_TS.get_row()'); end get_row; As you will see shortly, get_row() is called by set_row() in order to determine whether to insert or update.

Feel free to experiment with these functions and functions of your own until you are confident that you understand how this stuff works.

get_code_id_name(), get_code(), and get_name()

try { // Load the JDBC driver Class.forName(driver); connection = DriverManager.getConnection(url, username, password); } catch (ClassNotFoundException e) { // Could not find the driver } catch (SQLException e) { // Could not connect to the database } } @Test public void testXXX() { // do something with the connection }

The methods get_code_id_name(), get_code(), and get_name() serve the same purpose as their counterparts in code table packages. See the section about get_code_id_descr() earlier in the chapter for an explanation.