  @Test
  public void nonNullConstructorParametersPassPreconditions() {

    SpannerConnectionConfiguration config = this.configurationBuilder
        .setProjectId("project1")
        .setInstanceName("an-instance")
        .setDatabaseName("db")
        .build();
    assertThat(config.getFullyQualifiedDatabaseName())
        .isEqualTo("projects/project1/instances/an-instance/databases/db");
  }