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Logistic regression is a type of classification algorithm used in machine learning very frequently. It is one of the easiest and most efficient classification algorithms, which is tried out on almost every model built for classification problems. However, we can also use logistic regression for solving regression problems, although in such cases, we cannot expect great accuracy and reliability of the model. In this article, we will discuss logistic regression, how we can use it for regression problems, what steps are needed, and the code example for the same. This article will help one to understand the behavior of ... Read More
TestNG is a powerful testing framework, an enhanced version of JUnit which was in use for a long time before TestNG came into existence. NG stands for 'Next Generation'. TestNG framework provides the following features − Annotations help us organize the tests easily. Flexible test configuration. Test cases can be grouped more easily. Parallelization of tests can be achieved using TestNG. Support for data−driven testing. Inbuilt reporting. Java 1.5 or higher version allows to interact with TestNG. To run any test or code only in java we must use java main method. TestNG provides us a framework that ... Read More
TestNG is an open−source automation testing framework. It can be used along with build tool such as maven, Gradle, ant and even with snapshot. However, user can separately download the TestNG jar file and configure it with the project without using build tool. In this tutorial, we will see how to update IntelliJ IDEA testing−plugin to TestNG version 6.8 or latest TestNG jar. Download latest TestNG jar Following steps should be followed to download the latest/specific version of TestNG jar. Open the browser and navigate to https://testng.org. Once page opens, click on Download present at top. The ... Read More
TestNG provides an option of tracing the exception handling of code. User can test whether a code throws a desired exception or not. Here the expectedExceptions parameter is used along with the @Test annotation. This annotation is very useful in negative/exception testing. As per TestNG documentation: “The list of exceptions that a test method is expected to throw. If no exception or a different than one on this list is thrown, this test will be marked a failure.” In this article, we will see how to implement expectedExceptions in TestNG. Approach/Algorithm to solve this problem Step 1: Create MessageUtil.java ... Read More
A TestNG class can have different tests like test1, test2, test3 etc. There could be some failure while running the test suite and user may get failures in between of @Test methods. Once a test method gets failed, it skip remaining code of the @Test method and moves to the next @Test method. However, user may want to skip remaining all @Test methods after getting 1st failure. There are 2 most popular solution for such use cases: Write dependsOnMethods annotation − But this solution works only if user knows exact dependent method/s otherwise in large suite it would be ... Read More
Maven is a project management and comprehension tool that provides a complete build lifecycle framework. User can automate the project's build infrastructure in almost no time as Maven uses a standard directory layout and a default build lifecycle. In case of multiple environments, Maven can set−up the way to work as per standards in a very short time. As most of the project setups are simple and reusable, Maven makes life easy while creating reports, checks, build and testing automation setups. Maven provides developers ways to manage the following − Builds Documentation Reporting Dependencies SCMs Releases Distribution Mailing list ... Read More
TestNG is a testing framework and can use Maven as build tool. It helps to maintain dependencies and their version at one place in pom.xml User can run test from testng.xml or pom.xml. To run tests from pom.xml, user need to mention the path of testng.xml and require maven−surefire−plugin to execute. Along with testng.xml, maven provides feature to run specific group through maven or command line. While running through command line, user can mention group name at run time without changing anything either in testng.xml or pom.xml. This feature can be utilized to separate unit and integration tests. User can ... Read More
TestNG allows to run the test suites from IntelliJ IDE as well as command line. Usually, IntelliJ IDE is handy to run testng.xml for development purpose while command line (cmd) for actual execution. Apart from this, IntelliJ supports to run only single TestNG class as well as single test method inside a class. This feature helps while writing the code and debug it. In this article we will discuss how to run a single testng class as well as single test method inside a testng class. Approach/Algorithm to solve this problem Step 1: Create a TestNG class &minus ... Read More
Maven is a project management and comprehension tool that provides a complete build lifecycle framework. User can automate the project's build infrastructure in almost no time as Maven uses a standard directory layout and a default build lifecycle. To summarize, Maven simplifies and standardizes the project build process. It handles compilation, distribution, documentation, team collaboration and other tasks seamlessly. Maven increases reusability and takes care of most of the build related tasks. Junit is a testing framework and can use Maven as build tool. It helps to maintain dependencies and their version at one place in pom.xml User can run ... Read More
TestNG is a testing framework and can use Maven as build tool. It helps to maintain dependencies and their version at one place in pom.xml Maven provides flexibility to run using surefire plugin. It allows user to run testng.xml as well as directly run a testng class without using a testng.xml. There are few pre−requisites to achieve this: All testng classes should be created under src/test/java. If classes are not created under these directories user should have to pass testng.xml in pom.xml file. By default, maven surefire plugin identifies following classes: "**/Test*.java" − includes all of its subdirectories ... Read More