code: def test_collapse(self):
      # Inner products
      self.optimize_compare("ab,ab,c->")
      self.optimize_compare("ab,ab,c->c")
      self.optimize_compare("ab,ab,cd,cd->")
      self.optimize_compare("ab,ab,cd,cd->ac")
      self.optimize_compare("ab,ab,cd,cd->cd")
      self.optimize_compare("ab,ab,cd,cd,ef,ef->")
  
imports: import itertools
  import sys
  import platform
  import pytest
  import numpy
  from numpy.testing import assert_, assert_equal, assert_array_equal, assert_almost_equal, assert_raises, suppress_warnings, assert_raises_regex, assert_allclose
label_desc: Use image node_id 36 for calling the TestEinsum obj's underlying member method code with example usage: obj.test_collapse() without return types