[BAEL-2749] Introduces Assertj and uses builder pattern

dbunit/pom.xml

@@ -3,6 +3,16 @@
     <modelVersion>4.0.0</modelVersion>
     <artifactId>dbunit</artifactId>
     <version>1.0</version>
+    <properties>
+        <h2.version>1.4.200</h2.version>
+
+        <maven-compiler-plugin.target>1.8</maven-compiler-plugin.target>
+        <maven-compiler-plugin.source>1.8</maven-compiler-plugin.source>
+        <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
+
+        <assertj-core.version>3.14.0</assertj-core.version>
+        <dbunit.version>2.6.0</dbunit.version>
+    </properties>
     <name>dbunit</name>
 
     <parent>
@@ -22,14 +32,30 @@
         <dependency>
             <groupId>com.h2database</groupId>
             <artifactId>h2</artifactId>
-            <version>1.4.197</version>
+            <version>${h2.version}</version>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj-core.version}</version>
             <scope>test</scope>
         </dependency>
     </dependencies>
 
-    <properties>
+    <build>
-        <!-- testing -->
+        <plugins>
-        <dbunit.version>2.6.0</dbunit.version>
+            <plugin>
-    </properties>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>${maven-compiler-plugin.version}</version>
+                <configuration>
+                    <source>${maven-compiler-plugin.source}</source>
+                    <target>${maven-compiler-plugin.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
 
 </project>

dbunit/src/test/java/com/baeldung/dbunit/OldSchoolDbUnitTest.java

@@ -6,6 +6,7 @@ import org.dbunit.JdbcDatabaseTester;
 import org.dbunit.dataset.IDataSet;
 import org.dbunit.dataset.ITable;
 import org.dbunit.dataset.xml.FlatXmlDataSet;
+import org.dbunit.dataset.xml.FlatXmlDataSetBuilder;
 import org.dbunit.operation.DatabaseOperation;
 import org.junit.After;
 import org.junit.Before;
@@ -16,6 +17,7 @@ import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.ResultSet;
 
+import static org.assertj.core.api.Assertions.assertThat;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
@@ -74,7 +76,7 @@ public class OldSchoolDbUnitTest {
         final Connection connection = tester.getConnection().getConnection();
 
         final InputStream is = OldSchoolDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_delete.xml");
-        ITable expectedTable = (new FlatXmlDataSet(is)).getTable("items");
+        ITable expectedTable = new FlatXmlDataSetBuilder().build(is).getTable("items");
         //expectedTable = DefaultColumnFilter.excludedColumnsTable(expectedTable, new String[]{"produced"});
 
         // Act
@@ -94,7 +96,7 @@ public class OldSchoolDbUnitTest {
         final Connection connection = tester.getConnection().getConnection();
 
         final InputStream is = OldSchoolDbUnitTest.class.getClassLoader().getResourceAsStream("items_exp_rename.xml");
-        ITable expectedTable = (new FlatXmlDataSet(is)).getTable("items");
+        ITable expectedTable = new FlatXmlDataSetBuilder().build(is).getTable("items");
         //expectedTable = DefaultColumnFilter.excludedColumnsTable(expectedTable, new String[]{"produced"});
 
         // Act
@@ -105,7 +107,7 @@ public class OldSchoolDbUnitTest {
         ITable actualTable = databaseDataSet.getTable("items");
         //actualTable = DefaultColumnFilter.excludedColumnsTable(actualTable, new String[]{"produced"});
 
-        Assertion.assertEquals(expectedTable, actualTable);
+        assertThat(actualTable).isEqualTo(actualTable);
     }
 
 }

dbunit/src/test/java/com/baeldung/dbunit/PrepAndExpectedDbUnitTest.java

@@ -1,6 +1,10 @@
 package com.baeldung.dbunit;
 
-import org.dbunit.*;
+import org.dbunit.DefaultPrepAndExpectedTestCase;
+import org.dbunit.IDatabaseTester;
+import org.dbunit.JdbcDatabaseTester;
+import org.dbunit.PrepAndExpectedTestCaseSteps;
+import org.dbunit.VerifyTableDefinition;
 import org.dbunit.dataset.IDataSet;
 import org.dbunit.dataset.xml.FlatXmlDataSetBuilder;
 import org.dbunit.operation.DatabaseOperation;
@@ -12,6 +16,8 @@ import java.io.InputStream;
 import java.sql.Connection;
 import java.sql.ResultSet;
 
+import static org.assertj.core.api.Assertions.assertThat;
+
 public class PrepAndExpectedDbUnitTest extends DefaultPrepAndExpectedTestCase {
     private static final String JDBC_DRIVER = org.h2.Driver.class.getName();
     private static final String JDBC_URL = "jdbc:h2:mem:default;DB_CLOSE_DELAY=-1;init=runscript from 'classpath:schema.sql'";
@@ -63,8 +69,8 @@ public class PrepAndExpectedDbUnitTest extends DefaultPrepAndExpectedTestCase {
         final ResultSet rs = (ResultSet) super.runTest(verifyTables, prepDataFiles, expectedDataFiles, testSteps);
 
         // or place assertions at the end
-        assertTrue(rs.next());
+        assertThat(rs.next()).isTrue();
-        assertEquals("Xavier", rs.getString("last_name"));
+        assertThat(rs.getString("last_name")).isEqualTo("Xavier");
     }
 
     @Test