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+ # Copyright The OpenTelemetry Authors
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+ #
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+ # Licensed under the Apache License, Version 2.0 (the "License");
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+ # you may not use this file except in compliance with the License.
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+ # You may obtain a copy of the License at
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+ #
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+ # http://www.apache.org/licenses/LICENSE-2.0
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+ #
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+ # Unless required by applicable law or agreed to in writing, software
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+ # distributed under the License is distributed on an "AS IS" BASIS,
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+ # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+ # See the License for the specific language governing permissions and
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+ # limitations under the License.
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+
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+ import unittest
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+
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+ from opentelemetry .instrumentation .celery import CeleryInstrumentor
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+
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+ class TestUtils (unittest .TestCase ):
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+
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+ def test_duplicate_instrumentaion (self ):
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+ first = CeleryInstrumentor ()
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+ first .instrument ()
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+ second = CeleryInstrumentor ()
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+ second .instrument ()
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+ CeleryInstrumentor ().uninstrument ()
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+ self .assertIsNotNone (first .metrics )
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+ self .assertIsNotNone (second .metrics )
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+ self .assertEqual (first .task_id_to_start_time ,{})
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+ self .assertEqual (second .task_id_to_start_time , {})
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