Sometimes several tests need to share computationally expensive setup
(like logging into a database). While this can compromise the independence of
tests, sometimes it is a necessary optimization. Annotating a public static void no-arg method
with @BeforeClass causes it to be run once before any of
the test methods in the class. The @BeforeClass methods of superclasses
will be run before those the current class.
For example:
public class Example {
@BeforeClass public static void onlyOnce() {
...
}
@Test public void one() {
...
}
@Test public void two() {
...
}
}
public static voidno-arg method with@BeforeClasscauses it to be run once before any of the test methods in the class. The@BeforeClassmethods of superclasses will be run before those the current class.For example:
public class Example {
@BeforeClass public static void onlyOnce() {
...
}
@Test public void one() {
...
}
@Test public void two() {
...
}
}