How can I colorize Go test output using the default testing package?

Colorizing Output in Go Tests with Default Testing Package

While many Go testing libraries offer colored output, colorizing the output of the default testing package can be achieved using a generic colourizer called grc.

Installation:

On Debian/Ubuntu:

apt-get install grc

On macOS with Homebrew:

brew install grc

Configuration:

Create a configuration directory:

mkdir ~/.grc

Configure your grc settings in ~/.grc/grc.conf:

# Go
^([/\w\.]+\/)?go test\b
conf.gotest

Create a Go test colourization config in ~/.grc/conf.gotest:

# Example configuration
regexp==== RUN .*
colour=bright_blue
-
regexp=--- PASS: .* (\(\d+\.\d+s\))
colour=green, yellow
-
regexp=^PASS$
colour=bold white on_green
-
regexp=^(ok|FAIL)\s+.*
colour=default, magenta
-
regexp=--- FAIL: .* (\(\d+\.\d+s\))
colour=red, yellow
-
regexp=^FAIL$
colour=bold white on_red
-
regexp=[^\s]+\.go(:\d+)?
colour=cyan

Usage:

To colourize Go test runs, use the following command:

grc go test -v ./..

Optional Alias:

For convenience, you can add an alias to your shell:

alias go=grc go

Now, you can simply run go test -v ./.. to get colorized output.

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