### Question:
Parts_Picker_Get2 extends DataSource { @Override protected int getDataSourceKey() { return 1791; } Parts_Picker_Get2(IDataSourceCallback iDataSourceCallback, HttpDataSourceCredentials credentials, String serverName);   Parts_Picker_Get2(IDataSourceCallback iDataSourceCallback, HttpDataSourceCredentials credentials, String serverName, boolean useTestServer); protected  Parts_Picker_Get2(IDataSourceCallback iDataSourceCallback, HttpDataSourceCredentials credentials, String serverName,
      boolean useTestServer,
      IDataSourceConnector connector); String getPartNo(); void setPartNo(String partNo);  }### Answer:
@Test public void getDataSourceKey() { int expected = 1791; int output = new Parts_Picker_Get2(null, null, null).getDataSourceKey(); assertEquals(expected, output); }