Unit Testing Template For Etl Listing
Metrics usually fall into a fewcategories: project management (which includes process efficiency) and processimprovement. People are often confused about what metrics they should be using.You may use different metrics for different purposes.
For example, you may havea set of metrics that you use to evaluate the output of your test team. Onesuch metric may be the project management measure of the number of bugs found.Others may be an efficiency measure of the number of test cases written, or thenumber of tests executed in a given period of time. Ultimately, when you consider the valueof a metric, you need to ask if it provides visibility into the softwareproduct's quality. Metrics are only useful if they help you to make soundbusiness decisions in a timely manner. If the relevancy or integrity of ametric cannot be justified, don't use it.
Consider, for example, how managementanalysis and control makes use of financial reports such as profit/loss, cashflow, ratios, job costing, etc. These reports help you navigate your businessin a timely manner.
Engineering metrics are analogous, providing data to helpperform analyses and control the development process. However, your engineersmay not be the right people to give you the metrics you need to help in makingbusiness decisions, because they are not trained financial analysts. As anexecutive, you need to determine what metrics you want and tell your staff toprovide them. For example, coverage metrics areessential for your team.
Coverage is the measure of some amount of testing. Youcould have requirements coverage metrics, platform coverage metrics, pathcoverage metrics, scenario coverage metrics, or even test plan coveragemetrics, to name a few.
Cem Kaner lists over 100 types of coverage measures inhis paper 'Negligence and Testing Coverage.' Before the projectstarts, it is important to come to agreement on how you will measure testcoverage. Obviously, the more coverage of a certain type, the less riskassociated with that type.
1.0Define Requirements – In this process you should understand the business needsby gathering information from the user.You should understand the data needed and if it is available. Resources should be identified forinformation or help with the process. Deliverables.
A logical description ofhow you will extract, transform, and load the data. Sign-off of thecustomer(s).
Standards. Document ETL businessrequirements specification using either the ETL Business RequirementsSpecification Template, your own team-specific business requirementstemplate or system, or Oracle Designer. Templates. ETL Business RequirementsSpecification Template. 2.0Create Physical Design – In this process you should define your inputs and outputsby documenting record layouts. So ETLTesting implies - Testing this entire process using a tool or at table levelwith the help of test cases and Rules Mapping document.In ETL Testing, the following are prima facie validated -1) Data File loads from Source system on to Source Tables.2) The ETL Job that is designed to extract data from Source tables and thenmove them to staging tables. (Transform process)3) Data validation within the Staging tables to check all Mapping Rules /Transformation Rules are followed.4) Data Validation within Target tables to ensure data is present in required formatand there is no data loss from Source to Target tables.What I have mentioned here is just a tip of the ice-berg and a description ofETL Testing from a very high level but hope this gives an insight about ETLTesting.
ETL testingreally isn't all that complicated. Though, it requires a lot of attention todetail.What does a tester do in an ETL environment? This is what I do:1. Review the requirements2.
Tools For Etl Testing
Review the source data - data profiling.3. Modify the source data to meet any requirements that weren't already metwith the original source data.4. Execute the ETL job(s)/transformation(s).5. Validate the results.6.
Validate that the data is usable. If the data isn't usable, then you reallyhaven't gained anything.As to what tools are used, it depends on the individual and the environmentthat they're working in.
Personally, I want/need access to two applications ata bare minimum:1. The ETL tool itself2.
Some sort of db gui tool (i.e., Toad, etc.)Regardless of how the ETL code is exercised - directly through the ETL tool orthrough some command line script, I want to be able to go into the code so Ican understand how the developer is meeting a specific requirement. If a set ofdata is to be grouped together, I like to be able to go in and understand howthe code is grouping that data. Ultimately, I want to be an asset to thedevelopers (and the rest of the project) and not a line item to be checked offprior to implementation. (Besides, sometime down the road I may turn into anETL developer.and it's good to understand what is involved.)Lastly, there is one test that I usually start off with before really divingin-depth to what I'm working on. Formally, it's a smoke test. Personally, it'sthe 'surprise me' test.
If I can execute the ETL job and it completessuccessfully, that's half the battle right there. What this tells me is thatall of the pieces are in place to execute the job.be it database structure,file system structure, and/or data itself.
It's surprising how often thatsomething is missed. The plus side of this is that, regardless of whether datahas been set up for specific tests, I do have a starting point to startvalidating data.
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An educated person is respected everywhere.Education beats the beauty and the youth.' Chanakya quotes (Indian politician, strategist and writer, 350 BC-275 BC)Golden Words of Hitler:When u r in light, everything will follow u. But when u enter dark, evenyour own shadowwill not follow u that is lifeGod made relatives. Thank God we can choose our friendsMoney glitters, beauty sparkles, and intelligence shines.Keep a very firm grasp on reality, so you can strangle it at any time.Life is like a box of chocolates, you never know what you're getting.People may not always believe what you say, but they will believe what you do.I've always wanted to be somebody, but I should have been more specific.You can't have everything - where would you put it?Laugh and the world ignore you. ETL stands for extract, transform, and load. It canconsolidate the scattered data for anyorganization while working with different departments. It can very well handlethe datacoming from different departments.For example, a health insurance organization might have information on acustomer inseveral departments and each department might have that customer's informationlisted ina different way.
The membership department might list the customer by name,whereasthe claims department might list the customer by number. ETL can bundle allthis dataand consolidate it into a uniform presentation, such as for storing in adatabase or datawarehouse.ETL can transform not only data from different departments but also data fromdifferentsources altogether.
For example, any organization is running its business ondifferentenvironments like SAP and Oracle Apps for their businesses. If the highermanagementwants to take discussion on their business, they want to make the dataintegrated and usedit for their reporting purposes. ETL can take these two source system data andmake itintegrated in to single format and load it into the tables.Generally the normal testing steps are:. Requirements Analysis. Testing Methodologies. Test Plans and approach. Test Cases.
Test Execution. Verification and Validation.
Reviews and WalkthroughsThe main difference in testing a ETL is that we basically involve theSQL queries in our test case documents. It is vital to test both the initialloads of the DataWarehouse from the source i.e. When it gets extracted and then updating it onthe targettable i.e. The loading step. In specific cases, where trouble shooting isrequired, we verifyintermediate steps as well.A defect or bug detection can be appreciated if and only if it is detectedearly and is fixedat the right time without leading to a high cost. So to achieve it, it is veryimportant to setsome basic testing rules. They are:.
No Data losses. Correct transformation rules. Data validation.
Regression Testing. Oneshot/ retrospective testing. Prospective testing. View testing. Sampling. Post implementation.
Etl Testing Jobs
Ans2) ETL testing really isn't all that complicated. Though,it requires a lot of attention to detail.What does a tester do in an ETL environment? This is what I do:1. Review the requirements2. Review the source data - data profiling.3.
Etl Listing Search
Modify the source data to meet any requirements that weren't already metwith the original source data.4. Execute the ETL job(s)/transformation(s).5. Validate the results.6. Validate that the data is usable. If the data isn't usable, then you reallyhaven't gained anything.As to what tools are used, it depends on the individual and the environmentthat they're working in. Personally, I want/need access to two applications ata bare minimum:1.
The ETL tool itself2. Some sort of db gui tool (i.e., Toad, etc.)Regardless of how the ETL code is exercised - directly through the ETL tool orthrough some command line script, I want to be able to go into the code so Ican understand how the developer is meeting a specific requirement. If a set ofdata is to be grouped together, I like to be able to go in and understand howthe code is grouping that data. Ultimately, I want to be an asset to thedevelopers (and the rest of the project) and not a line item to be checked offprior to implementation.
(Besides, sometime down the road I may turn into anETL developer.and it's good to understand what is involved.)Lastly, there is one test that I usually start off with before really divingin-depth to what I'm working on. Formally, it's a smoke test. Personally, it'sthe 'surprise me' test. If I can execute the ETL job and it completessuccessfully, that's half the battle right there. What this tells me is thatall of the pieces are in place to execute the job.be it database structure,file system structure, and/or data itself.
It's surprising how often thatsomething is missed. The plus side of this is that, regardless of whether datahas been set up for specific tests, I do have a starting point to startvalidating data. The RANFORDBANK Functional Specifications document (FRS).
Testing the Admin, Banker and Customer (PersonalBanking) modules inE-Banking project. Functional / system testing of all test scenarios mentionedunder sec 10.0.
Creationof Test Requirements, Test Cases and Test Sets in Quality center. Preparationof Test Data for executing the Test Cases. Testcase Execution for 2 cycles and defect Tracking. Testcase execution on the following Operating System Windows2000. Testcase execution using the following browsers - IE.0.
Said.Hi, I'm the developer of ssisUnit. I'm curious as to why you feel it can't meet the requirements testing packages for data warehousing? My company uses it extensively for exactly that kind of testing. If your concern is related to load or volume testing, then I agree, that is not what ssisUnit was developed for. However, I don't really consider that to be unit testing. We work with small sets of test data for unit tests, and then run integration tests against a larger set of data to verify load and volume. If there is some missing functionality that you feel would make it more usable, then I'd like to hear about it.
I'm always looking for ways to improve it. Said.Firstly thanks for visiting my blog, I feel honoured. My apollogies, intention of my comment is not to offend by an means:) I have some questions for you. 1) I agree that for tasks such as Execute SQL Task, this could work. How easy would it be to create test cases for tasks such as Pivot and Script task and how much would be the time to prepare a test case for the same thru this framework.
2) Can this framework test all the points that I have put down in my post for unit testing? 3) In master-child package loads, where there are many container and tasks, I am not sure how much straightforward it would be to execute a test case where N number of tasks run in parallel. Master Extract package. 4) By and large, I felt that more complex and exhaustive the package, more is the time it would take to develop a test case. Also the same can't be reused as it's a case to case basis and not a generic framework.
That is not just due to framework but also due to nature of SSIS development. Framework is something that I look up to is for example, NUnit or XUnit which is a generic testing framework. These are my independent views. Nothing personal and No offence buddy:) May be after you provide more insight about the tool, I would start liking it:)!!