Run the code in SSMS on the WideWorldImporters database. In the Details tab, near the top-right corner, select the database connection for the schema that you used to create the AWARD_BONUS procedure. On the Details tab, near the top-right corner, select the database connection for the schema that you used to create the AWARD_BONUS procedure. You can export and import unit tests, suites, and objects that are stored in the library . Limited testing suggests that the VIEW approach is more effective than using sequential execution of components with intermediate tables, both in terms of elegance and performance.

unit test sql

Here, I want to notice about that, tSQLt framework unit tests have to start with “test” prefix if you don’t do this you can’t run your unit tests. Now, we will fix the badly written example name with the following naming convention. At the end of the day, unit tests create A LOT of code – code that must be maintained – and don’t offer the same value as a function test that actually tests for the correct outcome of a procedure or series of procedures. After making the change you can do some manual testing against the unit itself to make sure it still returns the expected values in the documentation. In the SQL Worksheet window, enter the following script and click Run Script. This code is also in the file award_bonus.sql from the directory where you downloaded the zip file from the Prerequisites section.

Why don’t you unit test SQL Server code?

The query also counts how long each skill has been applied in years, months, and days to make the subsequent analysis more convenient. Next, we need to define how we are going to execute the procedure and what parameters will be passed to it. The procedure parameters required are what name we are searching for and how many rows we want to return that match that name. In SSMS, we can do a quick query on the customers table to find a name that has only one result. The SQL file provides a blank T-SQL editor and does not require a connection.

unit test sql

That way you should be able to write queries with more or less predictable results. SQL unit test names must be easily understood by being self-describing and implying intent because we must figure out some question answers without a look at the SQL unit test code. In the point of this view; good naming offers a more readable SQL unit test so that it facilitates maintenance. We can create our own naming conventions, or we can find unit test naming conventions.

Saved datasets, inserts/updates/deletes that are part of the setup/teardown, and narrowly scoped operation can all be used to make this easier. Since the question isn’t database specific, details will vary. You now want to create a connection to the unit_test_repos user. As an alternative to using the SQL Developer graphical interface for to running unit tests and suites, and exporting and importing unit test objects, you can use the command line.

13 Example of Unit Testing (Tutorial)

I’m having trouble devising some of the unit tests themselves. I have a few methods which have been easy enough to test . I’ve got other parts of the code which are doing more complex things like running queries against the database and I’m not sure how to test them. You can also run a report, right-click on a grid and select Save Grid as Report, and then view the report to see how the unit testing tables have been built into queries.

Thus, if the test fails, you know exactly where to start debugging. Also, this insert operation does not affect the original table data. I hope it’s no secret that the execution of any transaction requires a certain space on the disk, in the data file or log. In general, if there is not enough space, then the file automatically grows. At this point, the file is blocked and SQL Server will wait for the disk subsystem to make the necessary operations on allocation of space on the disk. In 2014, I first discovered tSQLt, which turned to be a very nice free open-source framework for unit testing.

  • Since the question isn’t database specific, details will vary.
  • And, if you want to make the most of tSQLt, browse through our library of articles.
  • Feature provides a framework for testing PL/SQL objects, such as functions and procedures, and monitoring the results of such objects over time.
  • They check not just normal input values and their expected response, but also abnormal values and the expected exceptions that get raised.
  • This technique is simple and gives you real power to verify that a SQL script does what you think it does.

At first, we will apply naming conventions to our SQL unit test and then we will create separated unit tests. In our example, we will create a fake Tbl_TestName table and then we will insert new values to this fake table so that we can compare the expected and actual value which returns from the scalar-valued function. Because during the test execution the GetProductName function will retrieve data from the fake table, in this way we can ensure the expected value and also we will prevent external impacts. In terms of the database development, SQL unit testing is our as close to a silver bullet to minimize errors that we have available to us. In this way, we will clearly understand the differences between a bad and a good SQL unit test. Thus, we already have three autotests, which are stored in tSQLt.

Dataform is joining Google Cloud

For our unit test, we are going to check if the resulting row count of this procedure, when passed a certain list of parameters, contains 1 row. To set this up, we first need to remove the test condition already existing in this unit test. Highlight the inconclusiveCondition1 condition and click the red X in the Test Conditions pane . After that is removed, we are going to add a RowCount test condition.

It can also mean that the stored procedure itself fails to operate properly. Next, a temporary table named #tbl_res3 is created, it includes the product of two temporary tables #tbl_skill_empl and #tbl_res2 where each pair employee and skill has matching information obtained in par.7. Following that, the necessary information on the project and the job history is collected based on the set skills; the result goes to a temporary table called #tbl_skill_tmp.

unit test sql

First, we define the variable @count_skills that is used to count the number of skills found in the database that correspond to the reported number in the input parameter @SkillList. A guide to using Visual Studio to create U-SQL projects and How to Start Freelancing as a Web Developer in 2022 scripts. I am using a SQL Server 2016 instance with the WideWorldImporters database, SQL Server Management Studio 2016 , and Visual Studio Community with SQL Server Data Tools . Click the Run Script icon to create the AWARD_BONUS procedure.

Please note that the extended property defines a particular object belonging to tSQLt functionality. I run a bunch of scripts on the server and manually analyze the results of the samples. Oftentimes, I have to audit servers to identify non-optimal configuration settings.

Awesome explanation for something useful that I never looked at in the SQL/DB world. Also I love the way you tested the database here as well. Here’s an example of using several view to decompose a complicated query.

Welcome to tSQLt, the open source database unit testing framework for SQL Server

For Expected Result, select Exception and enter 6510 in the field next to it. This means that an error will not be found if the exception has an error code of 6510. In Specify Test Name window, make sure that AWARD_BONUS is specified for Test Name and that Create with single Dummy implementation is selected, then click Next. In Select Operation, select the HR_ORCL connection that you used to create the AWARD_BONUS procedure. A progress window appears while the repository is created. Expand the sys_orcl connection and right-click Other Users and select Create User.

2 SQL Developer User Interface for Unit Testing

The tests run in transactions, which rolls back any changes. Create a test system database that you can reload as often as you wish. Attach your development system to that database and validate your code before you go to production.

If it’s possible for a field to be NULL, you should have a test that makes sure that your code handles NULL values correctly. If one of your fields is a string (CHAR, VARCHAR, TEXT, &c), test to be sure you’re handling escaped characters correctly. The approach in this tutorial enables you to create a simple unit test suite using the two unit tests. The next window prompt is for database and deployment configuration.

I think your best approach is to have a test database handy, filled with gobs of crappy data, and run your database component tests against that. All the while remembering that your users will be much much better than you are at screwing up your data. Suites can be built from other suites and tests, allowing areas of interest to be grouped together, and even a “super suite” can be created that executes all tests. Specifies the return ID value, which is used as the primary key in the results table, and which will allow automation tools to query the results from the database. 2) You can check if a certain object is in the database (if it is there, then the test runs successfully, if not — it fails), etc.

Join to newsletter.

Curabitur ac leo nunc vestibulum.

Continue Reading

Get a personal consultation.

Call us today at (555) 802-1234

Request a Quote

Aliquam dictum amet blandit efficitur.