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Add support for move-only and &&-qualified actions in WillOnce.

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This provides a type-safe way for an action to express that it wants to be
called only once, or to capture move-only objects. It is a generalization of
the type system-evading hack in ByMove, with the improvement that it works for
_any_ action (including user-defined ones), and correctly expresses that the
action can only be used with WillOnce. I'll make existing actions benefit in a
future commit.

PiperOrigin-RevId: 440496139
Change-Id: I4145d191cca5655995ef41360bb126c123cb41d3
This commit is contained in:
Abseil Team
2022-04-08 18:39:39 -07:00
committed by Copybara-Service
parent 5f467ec04d
commit a1cc8c5519
4 changed files with 584 additions and 35 deletions
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docs/reference/mocking.md
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@@ -248,7 +248,9 @@ EXPECT_CALL(my_mock, GetNumber())
.WillOnce(Return(3));
```
The `WillOnce` clause can be used any number of times on an expectation.
The `WillOnce` clause can be used any number of times on an expectation. Unlike
`WillRepeatedly`, the action fed to each `WillOnce` call will be called at most
once, so may be a move-only type and/or have an `&&`-qualified call operator.
#### WillRepeatedly {#EXPECT_CALL.WillRepeatedly}