Coverage testing tool for The Go Programming Language (work-in-progress)
go get github.com/axw/gocov/gocov
There are currently three gocov commands: test, report and annotate.
gocov test
Running gocov test <package> will, for the specified package,
instrument all imported packages not part of the standard library,
and run "go test". Upon completion, coverage data will be emitted
in the form of a JSON document.
Packages will be recursively checked for imports, and those
packages will also be instrumented. If you wish to exclude a
package from instrumentation, you can specify an optional exclude
flag, e.g. gocov test -exclude comma,separated,packages.
gocov report
Running gocov report <coverage.json> will generate a textual
report from the coverage data output by gocov test. It is
assumed that the source code has not changed in between.
Output from gocov test is logged to stdout so users with
POSIX compatible terminals can direct the output to gocov report
to view a summary of the test coverage, for example: -
gocov test mypackage | gocov report
gocov annotate
Running gocov annotate <coverage.json> <package[.receiver].function>
will generate a source listing of the specified function, annotating
it with coverage information, such as which lines have been missed.