Pragmatic Unit Testing in Java with JUnit, 3rd Edition

Adding Tests from Your Test List

In ​Test Smell: Irrelevant Details in a Test​, you added a couple of needed tests to your test list. Now that you’ve whittled down your messy initial test into two sleek, clear tests, you should find it relatively easy to add a couple of new tests.

First, write a test that demonstrates how a completed search returns false for the errored() query:

utj3-refactor-tests/11/src/test/java/util/ASearch.java

@Test
void erroredReturnsFalseWhenReadSucceeds() {
   var stream = streamOn("");
   var search = new Search(stream, "", "");

   search.execute();

   assertFalse(search.errored());
}

Then, test the case where accessing the input stream throws an exception:

utj3-refactor-tests/11/src/test/java/util/ASearch.java ...