Add name accessor for JDBC containers (#520)

Container classes which want to support this feature need to override getDatabaseName() method.
Fixes #473

CHANGELOG.md

@@ -1,6 +1,9 @@
 # Change Log
 All notable changes to this project will be documented in this file.
 
+### Changed
+- Added `getDatabaseName` method to JdbcDatabaseContainer, MySQLContainer, PostgreSQLContainer ([\#473](https://github.com/testcontainers/testcontainers-java/issues/473))
+
 ## [1.5.0] - 2017-12-12
 ### Fixed
 - Fixed problems with using container based docker-compose on Windows ([\#514](https://github.com/testcontainers/testcontainers-java/pull/514))
@@ -16,7 +19,7 @@ All notable changes to this project will be documented in this file.
 
 ### Changed
 - Make Network instances reusable (i.e. work with `@ClassRule`) ([\#469](https://github.com/testcontainers/testcontainers-java/issues/469))
-- Added support for explicitly setting file mode when copying file into container ([\#446](https://github.com/testcontainers/testcontainers-java/issues/446), [\#467](https://github.com/testcontainers/testcontainers-java/issues/467)) 
+- Added support for explicitly setting file mode when copying file into container ([\#446](https://github.com/testcontainers/testcontainers-java/issues/446), [\#467](https://github.com/testcontainers/testcontainers-java/issues/467))
 - Use Visible Assertions 2.1.0 for pre-flight test output (eliminating Jansi/JNR-POSIX dependencies for lower likelihood of conflict. JNA is now used internally by Visible Assertions instead).
 - Mark all links functionality as deprecated. This is pending removal in a later release. Please see [\#465](https://github.com/testcontainers/testcontainers-java/issues/465). `Network` features should be used instead.
 - Added support for copying files to/from running containers ([\#378](https://github.com/testcontainers/testcontainers-java/issues/378))
@@ -82,7 +85,7 @@ All notable changes to this project will be documented in this file.
 - Added global configuration file `~/.testcontainers.properties` ([\#362](https://github.com/testcontainers/testcontainers-java/issues/362))
 - Added container arguments to specify SELinux contexts for mounts ([\#334](https://github.com/testcontainers/testcontainers-java/issues/334))
 - Removed unused Jersey dependencies ([\#361](https://github.com/testcontainers/testcontainers-java/issues/361))
-- Removed deprecated, wrongly-generated setters from `GenericContainer` 
+- Removed deprecated, wrongly-generated setters from `GenericContainer`
 
 ## [1.3.0] - 2017-06-05
 ### Fixed
@@ -126,7 +129,7 @@ All notable changes to this project will be documented in this file.
 - Add ability to attach volumes to a container using 'volumes from' ([\#244](https://github.com/testcontainers/testcontainers-java/issues/244), [\#289](https://github.com/testcontainers/testcontainers-java/issues/289))
 
 ## [1.1.8] - 2017-01-22
-### Fixed 
+### Fixed
 - Compatibility fixes for Docker for Mac v1.13.0 ([\#272](https://github.com/testcontainers/testcontainers-java/issues/272))
 - Relax docker environment disk space check to accomodate unusual empty `df` output observed on Docker for Mac with OverlayFS ([\#273](https://github.com/testcontainers/testcontainers-java/issues/273), [\#278](https://github.com/testcontainers/testcontainers-java/issues/278))
 - Fix inadvertent private-scoping of startup checks' `StartupStatus`, which made implementation of custom startup checks impossible ([\#266](https://github.com/testcontainers/testcontainers-java/issues/266))
@@ -145,14 +148,14 @@ All notable changes to this project will be documented in this file.
 - Compensate for premature TCP socket opening in Docker for Mac ([\#160](https://github.com/testcontainers/testcontainers-java/issues/160), [\#236](https://github.com/testcontainers/testcontainers-java/issues/236))
 - (Internal) Stabilise various parts of Testcontainers' self test suite ([\#241](https://github.com/testcontainers/testcontainers-java/issues/241))
 - Fix mounting of classpath resources when those resources are in a JAR file ([\#213](https://github.com/testcontainers/testcontainers-java/issues/213))
-- Reduce misleading error messages caused mainly by trying to perform operations on stopped containers ([\#243](https://github.com/testcontainers/testcontainers-java/issues/243)) 
+- Reduce misleading error messages caused mainly by trying to perform operations on stopped containers ([\#243](https://github.com/testcontainers/testcontainers-java/issues/243))
 
 ### Changed
 - Uses a default MySQL and MariaDB configuration to reduce memory footprint ([\#209](https://github.com/testcontainers/testcontainers-java/issues/209), [\#243](https://github.com/testcontainers/testcontainers-java/issues/243))
 - Docker Compose can optionally now use a local `docker-compose` executable rather than running inside a container ([\#200](https://github.com/testcontainers/testcontainers-java/issues/200))
 - Add support for privileged mode containers ([\#234](https://github.com/testcontainers/testcontainers-java/issues/234), [\#235](https://github.com/testcontainers/testcontainers-java/issues/235))
 - Allow container/network cleanup (ResourceReaper) to be triggered programmatically ([\#231](https://github.com/testcontainers/testcontainers-java/issues/231))
-- Add optional tailing of logs for containers spawned by Docker Compose ([\#233](https://github.com/testcontainers/testcontainers-java/issues/233)) 
+- Add optional tailing of logs for containers spawned by Docker Compose ([\#233](https://github.com/testcontainers/testcontainers-java/issues/233))
 - (Internal) Relocate non-proprietary database container tests to a single module
 
 ## [1.1.6] - 2016-09-22

modules/jdbc/src/main/java/org/testcontainers/containers/JdbcDatabaseContainer.java

@@ -45,6 +45,13 @@ public JdbcDatabaseContainer(String dockerImageName) {
      */
     public abstract String getJdbcUrl();
 
+    /**
+     * @return the database name
+     */
+    public String getDatabaseName() {
+        throw new UnsupportedOperationException();
+    }
+
     /**
      * @return the standard database username that should be used for connections
      */

modules/mysql/src/main/java/org/testcontainers/containers/MySQLContainer.java

@@ -36,7 +36,7 @@ protected Set<Integer> getLivenessCheckPorts() {
     protected void configure() {
         optionallyMapResourceParameterAsVolume(MY_CNF_CONFIG_OVERRIDE_PARAM_NAME, "/etc/mysql/conf.d", "mysql-default-conf");
 
-        addExposedPort(3306);
+        addExposedPort(MYSQL_PORT);
         addEnv("MYSQL_DATABASE", databaseName);
         addEnv("MYSQL_USER", username);
         addEnv("MYSQL_PASSWORD", password);
@@ -55,6 +55,11 @@ public String getJdbcUrl() {
         return "jdbc:mysql://" + getContainerIpAddress() + ":" + getMappedPort(MYSQL_PORT) + "/" + databaseName;
     }
 
+    @Override
+    public String getDatabaseName() {
+        return databaseName;
+    }
+
     @Override
     public String getUsername() {
         return username;

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

@@ -58,6 +58,11 @@ public String getJdbcUrl() {
         return "jdbc:postgresql://" + getContainerIpAddress() + ":" + getMappedPort(POSTGRESQL_PORT) + "/" + databaseName;
     }
 
+    @Override
+    public String getDatabaseName() {
+        return databaseName;
+    }
+
     @Override
     public String getUsername() {
         return username;