March 2018
Intermediate to advanced
324 pages
8h 30m
English
Content preview from Test-Driven Java Development, Second Edition - Second Edition
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Requirement – single operations
So, the plan is to support add, subtract, multiply and divide operations. As explained in the kata presentation, in RPN the operator is located at the end of the expression.
That means a - b is represented as a b -, and the same applies to the other operators: addition +, multiplication *, and division /.
Let's add one of each of the supported operations to our tests:
@Testpublic void addOperationReturnsCorrectValue() { assertThat(reversePolishNotation.compute("1 2 +")).isEqualTo(3);}@Testpublic void subtractOperationReturnsCorrectValue() { assertThat(reversePolishNotation.compute("2 1 -")).isEqualTo(1);}@Testpublic void multiplyOperationReturnsCorrectValue() { assertThat(reversePolishNotation.compute("2 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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