code: def test_ger(self):
      if self.dtype.char in "FD":
          with pytest.raises(TypeError):
              cublas.ger(self.alpha, self.x, self.y, self.a)
          return
      ref = self.alpha * cupy.outer(self.x, self.y) + self.a
      if self.mode is not None:
          self.alpha = self.mode.array(self.alpha)
      cublas.ger(self.alpha, self.x, self.y, self.a)
      cupy.testing.assert_allclose(
          self.a, ref, rtol=self.tol, atol=self.tol
      )
  
imports: import numpy
  import pytest
  import cupy
  from cupy import cublas
  from cupy import testing
label_desc: Use image node_id 2 for calling the TestGer obj's underlying member method code with example usage: obj.test_ger() without return types