52 lines
1.6 KiB
Markdown
52 lines
1.6 KiB
Markdown
# Logging macros
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Additional messages can be logged during a test case.
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## Streaming macros
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All these macros allow heterogenous sequences of values to be streaming using the insertion operator (```<<```) in the same way that std::ostream, std::cout, etc support it.
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E.g.:
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```c++
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INFO( "The number is " << i );
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```
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(Note that there is no initial ```<<``` - instead the insertion sequence is placed in parentheses.)
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These macros come in three forms:
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**INFO(** _message expression_ **)**
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The message is logged to a buffer, but only reported with the next assertion that is logged. This allows you to log contextual information in case of failures which is not shown during a successful test run (for the console reporter, without -s). Messages are removed from the buffer at the end of their scope, so may be used, for example, in loops.
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**WARN(** _message expression_ **)**
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The message is always reported but does not fail the test.
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**FAIL(** _message expression_ **)**
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The message is reported and the test case fails.
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## Quickly capture a variable value
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**CAPTURE(** _expression_ **)**
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Sometimes you just want to log the name and value of a variable. While you can easily do this with the INFO macro, above, as a convenience the CAPTURE macro handles the stringising of the variable name for you (actually it works with any expression, not just variables).
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E.g.
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```c++
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CAPTURE( theAnswer );
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```
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This would log something like:
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<pre>"theAnswer := 42"</pre>
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## Deprecated macros
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**SCOPED_INFO and SCOPED_CAPTURE**
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These macros are now deprecated and are just aliases for INFO and CAPTURE (which were not previously scoped).
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---
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[Home](../README.md) |