Migrate contrib json tests

[RahilJain1366]

No description provided.

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[pavoljuhas]

Mostly there after few adjustments. Please see inline comments.

[pavoljuhas]

Please use _compat.deprecate_attributes with a deadline of v1.8 instead - similarly as what was done for the XMON (and others) here -

Cirq/cirq-google/cirq_google/__init__.py

Lines 175 to 184 in 7e67d66

	_compat.deprecate_attributes(
	__name__,
	{
	'XMON': ('v0.16', _SERIALIZABLE_GATESET_DEPRECATION_MESSAGE),
	'FSIM_GATESET': ('v0.16', _SERIALIZABLE_GATESET_DEPRECATION_MESSAGE),
	'SQRT_ISWAP_GATESET': ('v0.16', _SERIALIZABLE_GATESET_DEPRECATION_MESSAGE),
	'SYC_GATESET': ('v0.16', _SERIALIZABLE_GATESET_DEPRECATION_MESSAGE),
	'NAMED_GATESETS': ('v0.16', _SERIALIZABLE_GATESET_DEPRECATION_MESSAGE),
	},
	)

The deprecate_attributes call should be the last one in this module.

[RahilJain1366]

Hi @pavoljuhas

I have tried creating similar to the XMON example provided, can you please review the change and let me know if it is correct or is there any fix needed for the change?

I tried running a basic run with test code but since json_test.py has been removed, I wasn't able to confirm the warning message.

[pavoljuhas]

Please delete, tested_elsewhere is an optional argument.
Also clean up the TODO comment, it would be confusing if left in.

[RahilJain1366]

Hi @pavoljuhas

I have removed tested_elsewhere from the spec.py file

[pavoljuhas]

@RahilJain1366 - please update your PR to merge towards the main branch. The vX.Y.Z-dev branches are for releases only and should not be use for regular code development.

(If easier you can also close this PR, rebase your branch on main and submit as a new PR.

[RahilJain1366]

@pavoljuhas

I have created a new PR (#7743) merging to the main branch.