class_docstr: This class contains test cases for the functions in tflearn/activations.py
code: def test_linear(self):
      f = tflearn.linear
  
      # Case 1
      x = tf.placeholder(tf.float32, shape=())
      self.assertEqual(f(x), x)
  
      # Case 2
      x = tf.placeholder(tf.int64, shape=())
      self.assertEqual(f(x), x)
  
file_path: tflearn/tests/test.py
imports: import tensorflow.compat.v1
  import tflearn
  import unittest
label_desc: Use image node_id 1 for calling the TestActivations obj's underlying member method code with example usage: obj.test_linear() without return types