### Question:
DefaultDatabaseConnectionGenerator implements DatabaseConnectionGenerator { @Override @Transient @JsonIgnore public Connection getConnection() { if (this.dbConnection == null) { try { this.connect(); } catch (AlgorithmConfigurationException algorithmConfigurationException) { algorithmConfigurationException.printStackTrace(); } } return this.dbConnection; } protected  DefaultDatabaseConnectionGenerator();  DefaultDatabaseConnectionGenerator(String dbUrl, String userName, String password,
                                            DbSystem system);  DefaultDatabaseConnectionGenerator(ConfigurationSettingDatabaseConnection setting); @Override RelationalInput generateRelationalInputFromSql(String queryString, String relationName); @Override ResultSet generateResultSetFromSql(String queryString); @Override void closeAllStatements(); @Override @Transient @JsonIgnore Connection getConnection(); @Override void close(); @Transient @JsonIgnore boolean isClosed(); int getFetchSize(); DefaultDatabaseConnectionGenerator setFetchSize(int fetchSize); int getResultSetType(); DefaultDatabaseConnectionGenerator setResultSetType(int resultSetType); int getResultSetConcurrency(); DefaultDatabaseConnectionGenerator setResultSetConcurrency(int resultSetConcurrency); DbSystem getSystem(); void setSystem(DbSystem system); String getDbUrl(); void setDbUrl(String dbUrl); String getUserName(); void setUserName(String userName); String getPassword(); void setPassword(String password); @Transient @JsonIgnore boolean isConnected(); static final int DEFAULT_FETCH_SIZE; static final int DEFAULT_RESULT_SET_TYPE; static final int DEFAULT_RESULT_SET_CONCURRENCY; }### Answer:
@Test public void testGetConnection() { DefaultDatabaseConnectionGenerator connectionGenerator = new DefaultDatabaseConnectionGenerator(); Connection expectedConnection = mock(Connection.class); connectionGenerator.dbConnection = expectedConnection; Connection actualConnection = connectionGenerator.getConnection(); assertSame(expectedConnection, actualConnection); }