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Pragmatic Unit Testing in Java 8 with JUnit
book

Pragmatic Unit Testing in Java 8 with JUnit

by Jeff Langr, Andy Hunt, Dave Thomas
March 2015
Intermediate to advanced
236 pages
5h 26m
English
Pragmatic Bookshelf
Content preview from Pragmatic Unit Testing in Java 8 with JUnit

Test Smell: Multiple Assertions

We’ve mentioned a few times in this book (one example: F[I]RST: [I]solate Your Tests) that it’s a good idea to move in the direction of a single assert per test. You’ll sometimes find reasons to assert multiple postconditions in a single test, but more often the multiple assertions indicate that you have two test cases.

Our longer test screams, “Split me!” The first case represents finding a search result in the input, and the second case represents finding no match. Split the test into two, providing each with a name that concisely states the expected behavior given the context for the test:

iloveyouboss/test-6/test/util/SearchTest.java
 
public​ ​class​ SearchTest {
 
private​ ​static​ ​final​ ​String​ A_TITLE ...
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Publisher Resources

ISBN: 9781680500769Errata Page