Add tests

Author: jonesbusy

pom.xml

@@ -18,6 +18,10 @@
     <changelist>999999-SNAPSHOT</changelist>
     <gitHubRepo>jenkinsci/database-mysql-plugin</gitHubRepo>
     <jenkins.version>2.414.3</jenkins.version>
+
+    <!-- Test dependencies version -->
+    <testcontainer.version>1.19.3</testcontainer.version>
+
   </properties>
 
   <licenses>
@@ -49,6 +53,33 @@
       <groupId>org.jenkins-ci.plugins</groupId>
       <artifactId>database</artifactId>
     </dependency>
+    <!-- Test dependencies -->
+    <dependency>
+      <groupId>org.testcontainers</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <version>${testcontainer.version}</version>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.testcontainers</groupId>
+      <artifactId>mysql</artifactId>
+      <version>${testcontainer.version}</version>
+      <scope>test</scope>
+      <exclusions>
+        <exclusion>
+          <groupId>org.apache.commons</groupId>
+          <artifactId>commons-compress</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.jetbrains</groupId>
+          <artifactId>annotations</artifactId>
+        </exclusion>
+        <exclusion>
+          <groupId>org.slf4j</groupId>
+          <artifactId>slf4j-api</artifactId>
+        </exclusion>
+      </exclusions>
+    </dependency>
   </dependencies>
 
   <repositories>

src/test/java/org/jenkinsci/plugins/database/mysql/MySQLDatabaseTest.java

@@ -0,0 +1,59 @@
+package org.jenkinsci.plugins.database.mysql;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.instanceOf;
+import static org.hamcrest.Matchers.is;
+
+import hudson.util.Secret;
+import java.io.IOException;
+import org.jenkinsci.plugins.database.GlobalDatabaseConfiguration;
+import org.jenkinsci.plugins.database.mysql.MySQLDatabase;
+import org.junit.jupiter.api.Test;
+import org.jvnet.hudson.test.JenkinsRule;
+import org.jvnet.hudson.test.junit.jupiter.WithJenkins;
+import org.testcontainers.containers.MySQLContainer;
+import org.testcontainers.junit.jupiter.Container;
+import org.testcontainers.junit.jupiter.Testcontainers;
+
+@WithJenkins
+@Testcontainers
+public class MySQLDatabaseTest {
+
+    public static final String TEST_IMAGE = "mysql:8.2.0";
+
+    @Container
+    private static final MySQLContainer<?> mysql = new MySQLContainer<>(TEST_IMAGE);
+
+    public void setConfiguration() throws IOException {
+        MySQLDatabase database = new MySQLDatabase(
+                mysql.getHost() + ":" + mysql.getMappedPort(3306),
+                mysql.getDatabaseName(),
+                mysql.getUsername(),
+                Secret.fromString(mysql.getPassword()),
+                null);
+        database.setValidationQuery("SELECT 1");
+        GlobalDatabaseConfiguration.get().setDatabase(database);
+    }
+
+    @Test
+    public void shouldSetConfiguration(JenkinsRule j) throws IOException {
+        setConfiguration();
+        assertThat(GlobalDatabaseConfiguration.get().getDatabase(), instanceOf(MySQLDatabase.class));
+    }
+
+    @Test
+    public void shouldConstructDatabase(JenkinsRule j) throws IOException {
+        MySQLDatabase database = new MySQLDatabase(
+                mysql.getHost() + ":" + mysql.getMappedPort(3306),
+                mysql.getDatabaseName(),
+                mysql.getUsername(),
+                Secret.fromString(mysql.getPassword()),
+                null);
+        assertThat(database.getDescriptor().getDisplayName(), is("MySQL"));
+        assertThat(
+                database.getJdbcUrl(),
+                is("jdbc:mysql://" + mysql.getHost() + ":" + mysql.getMappedPort(3306) + "/"
+                        + mysql.getDatabaseName() + ""));
+        assertThat(database.getDriverClass(), is(com.mysql.cj.jdbc.Driver.class));
+    }
+}