This CL adds extra tests for contrib.eager.metrics that check eager metrics combined with while loops.

PiperOrigin-RevId: 211479604

tensorflow/contrib/eager/python/metrics_test.py

@@ -25,11 +25,14 @@ from tensorflow.contrib.eager.python import metrics
 from tensorflow.contrib.summary import summary_test_util
 from tensorflow.python.eager import context
 from tensorflow.python.eager import test
+from tensorflow.python.framework import constant_op
 from tensorflow.python.framework import dtypes
 from tensorflow.python.framework import errors
 from tensorflow.python.framework import ops
 from tensorflow.python.framework import test_util
 from tensorflow.python.ops import array_ops
+from tensorflow.python.ops import control_flow_ops
+from tensorflow.python.ops import math_ops
 from tensorflow.python.ops import summary_ops_v2 as summary_ops
 from tensorflow.python.training import training_util
 from tensorflow.python.training.checkpointable import util as checkpointable_utils
@@ -244,6 +247,48 @@ class MetricsTest(test.TestCase):
     value = m.value()
     self.assertEqual(self.evaluate(value), 2.5)
 
+  @test_util.run_in_graph_and_eager_modes
+  def testGraphAndEagerTensorGlobalVariables(self):
+    m = metrics.Mean(use_global_variables=True)
+    inputs = ops.convert_to_tensor([1.0, 2.0])
+    accumulate = m(inputs)
+    result = m.result()
+    self.evaluate(m.init_variables())
+    self.evaluate(accumulate)
+    self.assertEqual(self.evaluate(result), 1.5)
+    # Second init resets all the variables.
+    self.evaluate(m.init_variables())
+    inputs = ops.convert_to_tensor([2.0, 3.0])
+    self.evaluate(m(inputs))
+    value = m.value()
+    self.assertEqual(self.evaluate(value), 2.5)
+
+  @test_util.run_in_graph_and_eager_modes
+  def testGraphAndEagerTensorWhileLoopDoubleCall(self):
+    m = metrics.Mean()
+    init_value = constant_op.constant(1)
+    cond = lambda i: math_ops.less(i, 3)
+    def body(x):
+      with ops.control_dependencies([m(x)]):
+        return math_ops.add(x, 1)
+    accumulate = control_flow_ops.while_loop(cond, body, [init_value])
+
+    result = m.result()
+    self.evaluate(m.init_variables())
+    self.evaluate(accumulate)
+    self.assertEqual(self.evaluate(result), 1.5)
+    # Second init resets all the variables.
+    self.evaluate(m.init_variables())
+    inputs = ops.convert_to_tensor([2.0, 3.0])
+    self.evaluate(m(inputs))
+    if ops.context.executing_eagerly():
+      self.evaluate(control_flow_ops.while_loop(cond, body, [init_value]))
+    else:
+      # Reuse the loop operators in graph mode
+      self.evaluate(accumulate)
+    value = m.value()
+    self.assertEqual(self.evaluate(value), 2.0)
+
   def testTwoMeansGraph(self):
     # Verify two metrics with the same name in the same graph raises a
     # ValueError.