docstr: Test dimension mismatches
docstr_tok: ["Test","dimension","mismatches"]
code: def test_shape_mismatch_error(
      self, query_shape, value_shape, key_shape
  ):
      """Test dimension mismatches"""
      layer = layers.GroupedQueryAttention(
          num_query_heads=4,
          num_key_value_heads=4,
          head_dim=2,
      )
      with self.assertRaisesRegex(ValueError, r"must be equal"):
          layer.compute_output_shape(
              query_shape, value_shape, key_shape
          )
  
file_path: keras/keras/layers/attention/grouped_query_attention_test.py
imports: import numpy
  import pytest
  from absl.testing import parameterized
  from keras import backend
  from keras import initializers
  from keras import layers
  from keras import testing
label_desc: Use image node_id 3 for calling the GroupedQueryAttentionTest obj's underlying member method code with example usage: obj.test_shape_mismatch_error(query_shape, value_shape, key_shape) without return types