GTFO

Go Test FOrmat

This package aims at creating a simple formatter for the test logs in golang.

In a sense, this adds a missing -format to the go test command. This is required in some cases when the editor expect some defined-output from a command in order to jump directly to the issues.

Usage

gtfo accepts only the JSON output from go test, so you can call it in the following way:

go test -json ./... | gtfo

All the flags for test should work as well, tho you might not get the expected output. I recommend using gtfo for testing and jumping to results directly, but not for complete output.

Configuration

You can pass a string to the -format flag to specify how you want to format your output. The syntax follows golang's template. Have a look at formatter.go for more informations.

Example

If we make a test in parser_test.go fail, we might get the following output:

$ go test ./...
?       github.com/nobe4/gtfo/cmd/gtfo  [no test files]
ok      github.com/nobe4/gtfo/internal/formatter        0.523s
ok      github.com/nobe4/gtfo/internal/module   (cached)
--- FAIL: TestCases (14.80s)
    parser_test.go:188: No Test
    ...
    parser_test.go:188: Fatal and fatal
    parser_test.go:197:
                Error Trace:    parser_test.go:197
                Error:          Not equal:
                                expected: "8"
                                actual  : "9"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -8
                                +9
                Test:           TestCases
FAIL
FAIL    github.com/nobe4/gtfo/internal/parser   15.223s
FAIL

$ go test -json ./... | gtfo
internal/formatter/parser_test.go:188: No Test
...
internal/formatter/parser_test.go:188: Fatal and fatal
internal/formatter/parser_test.go:197:
                Error Trace:    parser_test.go:197
                Error:          Not equal:
                                expected: "8"
                                actual  : "9"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -8
                                +9
                Test:           TestCases

We have the full path from the root directory to the file in question, which allows for easier jumping to it.

With a special format:

$ go test -json ./... | gtfo -format "{{.File}}:{{.Line}}:{{.Output}}\n"
parser_test.go:188:No Test
...
parser_test.go:188:Fatal and fatal
parser_test.go:197:
                Error Trace:    parser_test.go:197
                Error:          Not equal:
                                expected: "8"
                                actual  : "9"

                                Diff:
                                --- Expected
                                +++ Actual
                                @@ -1 +1 @@
                                -8
                                +9
                Test:           TestCases

Installation

Clone and build:

make build

You might want to change some environment variables, e.g.:

GOOS=linux make build

Contribute

Ideas and improvement in TODO.