Add tests for channels for util.py's gate_approx_eq#1028
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mhucka wants to merge 4 commits intotensorflow:masterfrom
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Add tests for channels for util.py's gate_approx_eq#1028mhucka wants to merge 4 commits intotensorflow:masterfrom
gate_approx_eq#1028mhucka wants to merge 4 commits intotensorflow:masterfrom
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`gate_approx_eq` in `tensorflow_quantum/python/util.py` had logic to handle quantum channels via `_channel_approx_eq`, but this path was not tested in `util_test.py`. This PR adds tests for the following scenarios: - All supported channels: `DepolarizingChannel`, `AsymmetricDepolarizingChannel`, `GeneralizedAmplitudeDampingChannel`, `AmplitudeDampingChannel`, `ResetChannel`, `PhaseDampingChannel`, `PhaseFlipChannel`, and `BitFlipChannel`. - Exact equality for each channel type. - Approximate equality within and outside the `atol` tolerance. - Type mismatches between different channels and between channels and non-channel gates.
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This pull request introduces a new test suite for verifying the approximate equality of various quantum channels and modifies an existing error message's string formatting. Feedback suggests reverting the string formatting change to use f-strings for better readability and refactoring the new test method to reduce code duplication by using a parameterized approach with self.subTest.
Update error message, and streamline test code
mhucka
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MichaelBroughton
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Apr 17, 2026
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gate_approx_eqintensorflow_quantum/python/util.pyhad logic to handle quantum channels via_channel_approx_eq, but this path was not tested inutil_test.py.This PR adds tests for the following scenarios:
All supported channels:
DepolarizingChannel,AsymmetricDepolarizingChannel,GeneralizedAmplitudeDampingChannel,AmplitudeDampingChannel,ResetChannel,PhaseDampingChannel,PhaseFlipChannel, andBitFlipChannel.Exact equality for each channel type.
Approximate equality within and outside the
atoltolerance.Type mismatches between different channels and between channels and non-channel gates.
Note: this PR was created with the help of Jules.