This is an integration testing that tests Spring transaction through service, and DAO layers all the way up to the embedded database like HSQLDB or H2. After commit or rollback, the number of records in the table are verified. The service layer defines the transactional boundaries with the “@Transactional” annotation....
Q1. What is BDD? A1. BDD is principally an idea about how software development should be managed by both business interests and technical insight. Test-driven development focuses on the developer’s opinion on how parts of the software should work. Behavior-driven development focuses on the users’ opinion on how they want...
To appreciate jBehave, let’s look at a better example here. This example is about a science formula Speed = distance / Time. So, given distance and time, calculate speed given speed and time, calculate distance given speed and distance, … Read more ›...
This extends the jBehave — Behavioural Driven Development (BDD) Q&A to use the same example with jUnit testing. Step 1: Make sure that you have both jUnit and jBehave in your pom.xml file.
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<dependency> <groupId>org.jbehave</groupId> <artifactId>jbehave-core</artifactId> <version>3.8</version> </dependency> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.10</version> <scope>test</scope> </dependency> |
Step 2: Refer to Behavioural Driven Development (BDD) for all the jBehave implementation. … Read more ›...
This extends the previous jBehave and BDD tutorials. The story is in a tabular format as shown below. This is an industrial strength example. Step 1: The story file which supplies a list of transactions as an input (i.e. via Given) and validates against a list of transactions that are...
Q1. What is Hamcrest, and what is its purpose?
A1. HAMCREST is an anagram for MATCHER. The purpose is to match the assertions the BDD (Behavior Driven Development) style. In short, reads better like English statements. So,
Instead of:
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assertEqual(greeterService.greetings(), "Hello World"); |
with Hamcrest,
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This tutorial focuses on testing data access logic with spring-test and hsqldb. This extends Part #2: JPA Hibernate Spring Maven Eclipse Tutorial – JPA configs and repository Testing the mapping of entities managed by hibernate and wiring up of JPA, Hibernate, etc via Spring. Schema and mock data similar to...
Q1. What are some of the libraries required for unit testing Spring based Java applications? A1. Spring Test — integration test support for Spring applications. 1. JUnit — for unit testing Java applications. 2. … Read more ›...
This Spring controller unit test is based on
HATEOAS RESTFul Service with Spring tutorial. The request URL and JSON response content are shown below.
REQUEST URL: http://localhost:8080/simpleSpring/greeting?name=John
RESPONSE JSON: {“content”:”Hello, John!”,”links”:[{“rel”:”self”,”href”:”http://localhost:8080/simpleSpring/greeting?name=John”}]}
REQUEST URL: http://localhost:8080/simpleSpring/greeting
RESPONSE JSON:{“content”:”Hello,
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This post extends the previous one on “Unit Test Hibernate – DAO Layer with Spring & HSQLDB“. The changes are
1. Add “persistence-jpa.xml” to src/main/resources.
2. Modify the “entityManagerFactory()” method in the “SimpleConfig.java”.
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Step 1: The pom.xml file with test jars, Spring jars, and hibernate jars
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.mytutorial</groupId> <artifactId>simpleSpringRestWeb</artifactId> <version>1.0-SNAPSHOT</version> <packaging>war</packaging> <name>simpleSpringRestWeb</name> <url>http://maven.apache.org</url> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <slf4j.version>1.7.10</slf4j.version> <commons-logging.version>1.1.1</commons-logging.version> <spring.version>4.0.9.RELEASE</spring.version> </properties> <dependencies> <!-- Unit Testing--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>4.11</version> <scope>test</scope> </dependency> <dependency> <groupId>org.mockito</groupId> <artifactId>mockito-all</artifactId> <version>1.9.0</version> <scope>test</scope> </dependency> <dependency> <groupId>org.hamcrest</groupId> <artifactId>hamcrest-all</artifactId> <version>1.3</version> <scope>test</scope> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-test</artifactId> <version>${spring.version}</version> <scope>test</scope> </dependency> <dependency> <groupId>com.jayway.jsonpath</groupId> <artifactId>json-path</artifactId> <version>0.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>com.jayway.jsonpath</groupId> <artifactId>json-path-assert</artifactId> <version>0.8.1</version> <scope>test</scope> </dependency> <!-- Hibernate --> <dependency> <groupId>org.hibernate.common</groupId> <artifactId>hibernate-commons-annotations</artifactId> <version>4.0.1.Final</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.hibernate.javax.persistence</groupId> <artifactId>hibernate-jpa-2.0-api</artifactId> <version>1.0.1.Final</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-core</artifactId> <version>4.2.0.SP1</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-entitymanager</artifactId> <version>4.2.0.SP1</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.hibernate</groupId> <artifactId>hibernate-ehcache</artifactId> <version>4.2.0.SP1</version> <scope>compile</scope> </dependency> <dependency> <groupId>org.jboss.jbossts</groupId> <artifactId>jbossjta</artifactId> <version>4.16.4.Final</version> </dependency> <!-- HSQLDB --> <dependency> <groupId>org.hsqldb</groupId> <artifactId>hsqldb</artifactId> <version>2.3.2</version> </dependency> <!-- Spring --> <dependency> <groupId>org.springframework.data</groupId> <artifactId>spring-data-jpa</artifactId> <version>1.5.1.RELEASE</version> <exclusions> <exclusion> <groupId> org.springframework</groupId> <artifactId>spring-jdbc</artifactId> </exclusion> <exclusion> <groupId> org.springframework</groupId> <artifactId>spring-core</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-core</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-beans</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-expression</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context</artifactId> <version>${spring.version}</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-jdbc</artifactId> <version>${spring.version}</version> </dependency> <!-- Other --> </dependencies> </project> |
Step 2: The HSQL DB schema and data scripts in the src/test/resources folder.
sql/schema.sql
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CREATE TABLE tbl_person ( person_id int NOT NULL , person_gender varchar(6) NOT NULL , person_name varchar(100) NOT NULL , person_age int NOT NULL ); CREATE UNIQUE INDEX idx_tbl_person ON tbl_person(person_id) |
sql/data.sql
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INSERT INTO tbl_person (person_id, person_gender, person_name, person_age) VALUES ( 1, 'MALE', 'John', 23); INSERT INTO tbl_person (person_id, person_gender, person_name, person_age) VALUES ( 2, 'FEMALE', 'Mary', 23); |
Step 3: The Spring configuration for the unit tests in the src/test/java folder.
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Most interviewers like Java candidates those who are passionate and experienced about writing unit tests. Any non trivial Java application will be making calls to database tables. So, here are a few questions and answers testing your ability to write unit tests to test data access layer.
Q1.
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This assumes that you have gone through the basic JUnit & Mockito tutorials. Here is test class to “Unit Testing Servlet Filter”. The “HttpServletRequest“, “HttpServletResponse“, “FilterChain“, etc are mocked with Mockito. The Spring also provides classes like “
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