Issue #17887 has been reported by Dominic Cleal.

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Bug #17887: Mocha expectation failure during property sync results in 
"Puppet::Util::Log requires a message"
https://projects.puppetlabs.com/issues/17887

Author: Dominic Cleal
Status: Unreviewed
Priority: Low
Assignee: Dominic Cleal
Category: transactions
Target version: 
Affected Puppet version: development
Keywords: resource harness, transaction
Branch: 


During provider development and testing with rspec+mocha and using a test 
catalog, an expectation failure can cause the following log message:

    Could not evaluate: Puppet::Util::Log requires a message

This occurs if the property sync calls a method that has a mocha expectation 
set, but has reached the max call count or similar.

When testing a catalog from a test, the `Puppet::Transaction::ResourceHarness` 
calls `apply_parameter` for a given parameter, which then calls 
`property.sync`.  If the mocha expectation fails inside this sync, the `rescue` 
block is never called (it isn't an exception) but the `ensure` block is still 
run.  This calls `send_log` on the event, but the message is uninitialised at 
that point so the logging fails with the above error.


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