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This chapter covers the following topics: In the same way that a network designer would be foolish to specify equipment or make technical recommendations without prior knowledge of customer requirements, a test engineer would be misguided to attempt writing a test plan without first understanding the triggers, scope, motives, and expectations for the test initiative.
By rushing ahead and skipping this critical step, you risk missing the mark in your testing, focusing on the wrong types of tests, or capturing erroneous results.
This will waste precious time and resources as you continuously redefine your test plan; add, remove, or modify equipment to your lab topology; rerun your test cases; and generate reports. Taking time to identify the objectives and outline an assessment is critical before you ever step foot into the lab.
Only after the following questions are answered should you begin to write a detailed test plan or build a lab topology: What are the test triggers?
Who is requesting the test and what are their motives? How much test case writing approaches is necessary and what constitutes success? What is the impact of test failure and what are the known risks?
What are the resources people, lab equipment, and test tools required to execute the test? As discussed in Chapter 2, "Testing Throughout the Network Lifecycle," a complimentary relationship between network testing and design functions exists in organizations that execute enterprise architecture effectively.
This chapter will begin to fill in the practical details of what is necessary to build an effective approach toward different types of test requests. It begins with a suggested approach for assessing and scoping a test project, and offers guidance and best practices for the following considerations: How to identify test case scenarios How to develop a lab prototype How to choose the proper test tools necessary to execute the different types of tests How to write a detailed test plan As with most technical undertakings, there is no absolute right way to approach systems testing.
We do not promote ours as the only way to conduct successful testing. However, this is a proven method that will improve your chances of getting it right the first time. Motivations for Different Types of Testing The first step in assessing the objective and scope of a test effort is to understand the reasons for why it was requested, and the motives of the people or organization that requested it.
In some instances, your client may be able to clearly tell you why they want testing and what they expect from testing, while others may only be able to tell you that their proposed deployment "is critical to the business and must be tested.
Following are some of the most common triggers and motivations associated with the different types of testing. Proof of Concept Testing Proof of concept POC testing is normally conducted during the Plan Phase of a new network design, or prior to the introduction of a new technology or service into an operational network.
A network architect will often request that a POC test be completed to ensure that a new product or technology will work as expected in the context of their design. Successful POC testing is often the criteria for purchasing or moving into the low-level design LLD phase of a project, and in some cases POC testing is a mandatory milestone to be completed before purchasing approval will be granted.
In general, POC testing should be conducted systematically but persist only as long as necessary to prove that a proposed solution will work as expected.
An exception to this general rule is when POC testing is used as a means to differentiate between similar products as part of a "bake-off" test. These types of tests often require extensive scale and feature testing in order to provide the necessary data to differentiate between competing products.
Network Readiness Testing Network readiness testing is often included as part of a network assessment to determine whether a production network can meet the needs of a new application or service, and to identify any gaps that may hinder it. This type of testing is commonly conducted prior to deploying a Cisco Unified Communications UC solution, to help an enterprise determine whether its network will be able to meet the stringent requirements associated with real-time applications.
Network readiness testing for UC often involves test tool injection and measurement of synthetic application traffic across a live network to predict how the actual application will perform when network elements are running in steady-state conditions, during day-to-day operations.
Success criteria for this type of testing is easy to define because the SLA requirements with respect to delay, jitter, and loss are well understood for UC applications.
Careful planning and coordination is often necessary when this type of network readiness testing is conducted so that production service disruption can be avoided. Design verification testing is similar to POC testing in that both are performed in order to gain confidence in a proposed design or solution prior to deployment.
Design verification testing is typically more extensive than POC testing, however, as it often represents the last opportunity before implementation to fully examine whether all aspects of a design will function as expected when subjected to various stress conditions.
Design verification testing is focused on performance, scalability, failover, operations, and manageability elements of a design.Figure caninariojana.com Agile Lifecycle. 4. How to Test. Although you want to keep your database testing efforts as simple as possible, at first you will discover that you have a fair bit of both learning and set up to do.
JUnit is a simple, open source framework to write and run repeatable tests. It is an instance of the xUnit architecture for unit testing frameworks. A well-written test case should allow any tester to understand and execute the test.
When writing test cases, it’s important to put yourself in the user’s shoes and include all the necessary details.
The test plan document is used to identify the features to be tested, features not to be tested, testing team allocations and their interface, resource requirements, testing schedule, test case writing, test coverage, test deliverables, pre-requisite for test execution, bug reporting and tracking mechanism, test metrics etc.
Mocks Aren't Stubs. The term 'Mock Objects' has become a popular one to describe special case objects that mimic real objects for testing. Most language environments now have frameworks that make it easy to create mock objects. i ABSTRACT Environmental education: improving student achievement Oksana Bartosh The present research, being one strand of the Environmental Education.