How to write a test case for a calculator

This is usually the smallest unit of testing. A Test Case will consist of information such as requirements testing, test steps, verification steps, prerequisites, outputs, test environment, etc. A set of inputs, execution preconditions, and expected outcomes developed for a particular objective, such as to exercise a particular program path or to verify compliance with a specific requirement.

How to write a test case for a calculator

how to write a test case for a calculator

This includes consulting, training developers, building courses, and writing books. Because of the demand and driving interest, I find myself at many companies, explaining the particulars of testing too many different people. Help us boost our quality. A great deal of earnest interest in the topic lays the groundwork for improvement.

But it also lays the groundwork for confusion. A company brought me in to teach developers to write automated unit testing and someone is asking me a term loosely associated to the QA group. A test case is a set of conditions or variables under which a tester will determine whether a system under test satisfies requirements or works correctly.

Seems reasonable to me. You have a system and a tester. Then the tester creates some set of conditions, does something to the system, and confirms the outcome.

The tester puts together a hypothesis about system behavior. Next, he creates a situation — an experiment, if you will — in which the preconditions for confirming or denying that hypothesis exist. Then he executes the experiment.

how to write a test case for a calculator

And, finally, he observes and records the outcome. We might then say that writing a test case equates with forming and recording hypotheses about the system.

And the software testing fundamentals site describes the same paradigm for QA pros. In fact, I think we can thus generalize a software test case to anyone that might exercise the system in any way. As an initiate to writing a test case, you might find yourself quickly overwhelmed with questions.

What is a test suite and how do I find its ID? Does every test case require a related requirement? How much detail should I specify in the test procedure? You get the idea, I imagine.

That site has launched from a fairly simple concept test the system to a fairly complex one. Let me demystify a bit for those unfamiliar and add some emphasis for those familiar. We went from a concept to a full blown implementation with many assumptions.

It potentially invites the confusion of activity with productivity. Because testing requires precision in setup, people think that test case management requires hyper-precision in process.

And, of course, someone has to record, revise, and maintain all of that detail. And all of that boilerplate requires creation and maintenance.

C Program to Make a Simple Calculator using Switch Statement

Let me then talk about how to write a good test case. Having people in your organization that thumb through a book, brainlessly following instructions, and recording the result wastes the talent of intelligent people and wastes money.

When developers exercise the system using automated unit tests, integration tests, and acceptance tests, you have good test cases. When QA folks use tools at their disposal to script system tests, you have good test cases. A good test case, and the good test suite encasing it, result from figuring out how to let the humans do the world of conceiving of the experiments while the machines do the work of executing them.

Well, I simply explain that everyone should follow the scientific method, with precision, using the tools at their disposal. Get the system into the required state, execute the behavior in question, and observe and record the result.

A good test case is the test case that makes this easy. But I then go on to advocate collaboration and a blurring of responsibilities.Test case will contain test case id, test description, input, expected result columns.

Generally asking test case objects (Pen, Mobile, Bottle, and Calculator) are general in nature. When we are writing a test case for objects like above we should consider the objects parameters like.

Before you even write the class, take a moment to write a few tests for it, as shown below. (By writing tests early, you start thinking about which cases might cause problems.) Then write the Calculator class, compile both classes, and run the tests to see if they pass.

This is basic Calculator program written in C# which makes use of the various Windows Form controls. Basic mathematical functions like Addition, Subtraction, Multiplication and division can be performed using this Calculator. In most of the cases interviewer ask to write test cases.

Today I am helping myself in writing test cases for elevator (lift).But before start writing test case I would like to cast our attention on one of the best thing that is ensured by Software Testing and This is nothing but the Software Quality. Every tester writes test cases however many times the test cases are rejected by reviewers because of bad quality, in order to write good test cases one should know what are the characteristics of a good test case.

This Hypothesis Testing Calculator calculates whether we reject a hypothesis or not based on the null and alternative hypothesis. In this case, the null hypothesis is the claimed hypothesis by the company, that the average complaints is 20 (μ=20).

The alternative hypothesis is that μ > 20, which is what we suspect. Paired t-test.

How to write good Test Cases - Software Testing Mentor