More customizable postgres container

modules/postgresql/src/main/java/org/testcontainers/containers/PostgreSQLContainer.java

@@ -4,16 +4,18 @@
  * @author richardnorth
  */
 public class PostgreSQLContainer<SELF extends PostgreSQLContainer<SELF>> extends JdbcDatabaseContainer<SELF> {
-
     public static final String NAME = "postgresql";
     public static final String IMAGE = "postgres";
     public static final Integer POSTGRESQL_PORT = 5432;
+    private String databaseName = "test";
+    private String username = "test";
+    private String password = "test";
 
     public PostgreSQLContainer() {
-        super(IMAGE + ":latest");
+        this(IMAGE + ":latest");
     }
 
-    public PostgreSQLContainer(String dockerImageName) {
+    public PostgreSQLContainer(final String dockerImageName) {
         super(dockerImageName);
     }
 
@@ -26,9 +28,9 @@ protected Integer getLivenessCheckPort() {
     protected void configure() {
 
         addExposedPort(POSTGRESQL_PORT);
-        addEnv("POSTGRES_DATABASE", "test");
-        addEnv("POSTGRES_USER", "test");
-        addEnv("POSTGRES_PASSWORD", "test");
+        addEnv("POSTGRES_DB", databaseName);
+        addEnv("POSTGRES_USER", username);
+        addEnv("POSTGRES_PASSWORD", password);
         setCommand("postgres");
     }
 
@@ -39,21 +41,36 @@ public String getDriverClassName() {
 
     @Override
     public String getJdbcUrl() {
-        return "jdbc:postgresql://" + getContainerIpAddress() + ":" + getMappedPort(POSTGRESQL_PORT) + "/test";
+        return "jdbc:postgresql://" + getContainerIpAddress() + ":" + getMappedPort(POSTGRESQL_PORT) + "/" + databaseName;
     }
 
     @Override
     public String getUsername() {
-        return "test";
+        return username;
     }
 
     @Override
     public String getPassword() {
-        return "test";
+        return password;
     }
 
     @Override
     public String getTestQueryString() {
         return "SELECT 1";
     }
+
+    public SELF withDatabaseName(final String databaseName) {
+        this.databaseName = databaseName;
+        return self();
+    }
+
+    public SELF withUsername(final String username) {
+        this.username = username;
+        return self();
+    }
+
+    public SELF withPassword(final String password) {
+        this.password = password;
+        return self();
+    }
 }

modules/postgresql/src/test/java/org/testcontainers/junit/CustomizablePostgreSQLTest.java

@@ -0,0 +1,48 @@
+package org.testcontainers.junit;
+
+import com.zaxxer.hikari.HikariConfig;
+import com.zaxxer.hikari.HikariDataSource;
+import org.junit.Rule;
+import org.junit.Test;
+import org.testcontainers.containers.PostgreSQLContainer;
+
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+import static org.rnorth.visibleassertions.VisibleAssertions.assertEquals;
+
+/**
+ * @author richardnorth
+ */
+public class CustomizablePostgreSQLTest {
+    private static final String DB_NAME = "foo";
+    private static final String USER = "bar";
+    private static final String PWD = "baz";
+
+    @Rule
+    public PostgreSQLContainer postgres = new PostgreSQLContainer("postgres:latest")
+        .withDatabaseName(DB_NAME)
+        .withUsername(USER)
+        .withPassword(PWD);
+
+    @Test
+    public void testSimple() throws SQLException {
+        HikariConfig hikariConfig = new HikariConfig();
+        hikariConfig.setJdbcUrl("jdbc:postgresql://"
+            + postgres.getContainerIpAddress()
+            + ":" + postgres.getMappedPort(PostgreSQLContainer.POSTGRESQL_PORT)
+            + "/" + DB_NAME);
+        hikariConfig.setUsername(USER);
+        hikariConfig.setPassword(PWD);
+
+        HikariDataSource ds = new HikariDataSource(hikariConfig);
+        Statement statement = ds.getConnection().createStatement();
+        statement.execute("SELECT 1");
+        ResultSet resultSet = statement.getResultSet();
+
+        resultSet.next();
+        int resultSetInt = resultSet.getInt(1);
+        assertEquals("A basic SELECT query succeeds", 1, resultSetInt);
+    }
+}