š gotestfmt - Awesome Go Library for Continuous Integration
go test output for humans.
Detailed Description of gotestfmt
gotestfmt: go test output for humans
ā ļø Action required: gotestfmt has moved to the
GoTestToolsorganization and you need to update your references. Please see the announcement. The old repository will be deleted on January 1, 2023.
Are you tired of scrolling through endless Golang test logs in GitHub Actions (or other CI systems)?
Then this is the tool for you. Run it locally, or in any CI system with the following command line like this:
set -euo pipefail
go test -json -v ./... 2>&1 | tee /tmp/gotest.log | gotestfmt
Tadam, your tests will now show up in a beautifully formatted fashion. Plug it into your CI and you're done. Installation is also easy:
Note: Please always save the original log. You will need it if you have to file a bug report for gotestfmt.
Table of Contents
Installing
You can install gotestfmt using the following methods.
Manually
You can download the binary manually from the releases section. The binaries have no dependencies and should run without any problems on any of the listed operating systems.
Using go install
You can install gotestfmt using the go install command:
go install github.com/gotesttools/gotestfmt/v2/cmd/gotestfmt@latest
You can then use the gotestfmt command, provided that your Go bin directory is added to your system path.
Using a container
You can also run gotestfmt in a container. For example:
go test -json ./... | docker run ghcr.io/gotesttools/gotestfmt:latest
If you have a high volume of requests you may want to mirror the image to your own registry.
Setting it up in your CI system
We have support for several CI systems, and you can also customize the output to match your system. Gotestfmt detects the CI system based on environment variables. If it can't detect the CI system it will try to create a generic colored test output. You can force the CI output with the -ci github|gitlab|... option.
GitHub Actions
For GitHub Actions we provide gotestfmt-action, making it easy to use. Here's how you can set it up:
jobs:
build:
name: Test
runs-on: ubuntu-latest
steps:
# Checkout your project with git
- name: Checkout
uses: actions/checkout@v2
# Install Go on the VM running the action.
- name: Set up Go
uses: actions/setup-go@v2
with:
go-version: 1.16
# Install gotestfmt on the VM running the action.
- name: Set up gotestfmt
uses: gotesttools/gotestfmt-action@v2
with:
# Optional: pass GITHUB_TOKEN to avoid rate limiting.
token: ${{ secrets.GITHUB_TOKEN }}
# Alternatively, install using go install
- name: Set up gotestfmt
run: go install github.com/gotesttools/gotestfmt/v2/cmd/gotestfmt@latest
# Run tests with nice formatting. Save the original log in /tmp/gotest.log
- name: Run tests
run: |
set -euo pipefail
go test -json -v ./... 2>&1 | tee /tmp/gotest.log | gotestfmt
# Upload the original go test log as an artifact for later review.
- name: Upload test log
uses: actions/upload-artifact@v2
if: always()
with:
name: test-log
path: /tmp/gotest.log
if-no-files-found: error
Gotestfmt provides specialized output for GitHub Actions based on the presence of the GITHUB_WORKFLOW environment variable. You can also set gotestfmt to run in GitHub Actions mode by providing the -ci github option.
In GitHub Actions mode gotestfmt will look for the rendering templates in the .gotestfmt/github and .gotestfmt folders, which can be customized.
GitLab CI
There are multiple ways to run gotestfmt in GitLab CI. You can simply download it from the releases section and use it that way, but we would recommend creating a custom container image to run the tests as follows:
# Include gotestfmt as a base image for building
FROM ghcr.io/gotesttools/gotestfmt:latest AS gotestfmt
# Use the golang base image
FROM golang
# Copy gotestfmt into the golang image
COPY --from gotestfmt /gotestfmt /usr/local/bin/
You can then run the tests within this image with the following command:
go test -json -v ./... | /usr/local/bin/gotestfmt
To put it all together, you can use the following .gitlab-ci.yaml:
docker-build:
image: docker:latest
stage: build
services:
- docker:dind
before_script:
- docker login -u "$CI_REGISTRY_USER" -p "$CI_REGISTRY_PASSWORD" $CI_REGISTRY
script:
- |
docker build -t gotestfmt .
docker run \
-v $(pwd):/source \
-v /tmp:/tmp |
-e GITLAB_CI=${GITLAB_CI} \
gotestfmt \
/bin/sh -c "cd /source; go test -json -v ./... 2>&1 | tee /tmp/gotest.log | /usr/local/bin/gotestfmt"
artifacts:
paths:
- /tmp/gotest.log
expire_in: 1 week
rules:
- if: $CI_COMMIT_BRANCH
exists:
- Dockerfile
You can, of course, customize this to your liking. We also recommend mirroring the gotestfmt image to your local registry to avoid rate limiting errors. See the GitLab blog on how to do this.
Gotestfmt detects running in GitLab CI based on the GITLAB_CI environment variable. You can also force gotestfmt to run in GitLab CI mode by passing the -c gitlab option.
CircleCI
There is no special template for CircleCI since it doesn't support advanced features like log folding. You can set up Circle CI by using the gotestfmt container directly:
version: 2
jobs:
test:
docker:
- image: circleci/golang:1.16
steps:
- checkout
- setup_remote_docker:
version: 19.03.13
- run:
name: Run tests
command: go test -json -v ./... 2>&1 | tee /tmp/gotest.log | docker run -i ghcr.io/gotesttools/gotestfmt:latest
- store_artifacts:
path: /tmp/gotest.log
destination: gotest.log
workflows:
version: 2
build-workflow:
jobs:
- test
Add your own CI
You can, of course, customize the output to match your CI system. You can do this creating a folder named .gotestfmt in your project and adding the go template files below. You can find the default templates in the .gotestfmt folder in this repository.
When running on a well-known CI system, such as GitHub Actions, gotestfmt will detect that and look in the specific subfolder. If you think a specific CI system should have a custom template, please send us a pull request to this repository.
downloads.tpl
This file contains the output fragment showing the package downloads in the Go template format. It has the following variables available:
| Variable | Type | Description |
|---|---|---|
.Failed | bool | Indicates an overall failure. |
.Packages | []Package | A list of packages that have been processed. |
.StartTime | *time.Time | The time the first download line was seen. May be empty. |
.EndTime | *time.Time | The time the last download line was seen. May be empty. |
.Reason | string | If an extra reason is given for the failure, the text is included here. |
.Settings | RenderSettings | The render settings (what to hide, etc, see below). |
The Package items have the following format:
| Variable | Type | Description |
|---|---|---|
.Package | string | Name of the package. (e.g. github.com/gotesttools/gotestfmt) |
.Version | string | Version of the package. (e.g. v1.0.0) |
.Failed | bool | If the package download has failed. |
.Reason | string | Text explaining the failure. |
package.tpl
This template is the output format for the results of a single package and the tests in it. If multiple packages are tested, this template is called multiple times in a row. It has the following fields:
| Variable | Type | Description |
|---|---|---|
.Name | string | Name of the package under test. |
.Result | string | Result of all tests in this package. Can be PASS, FAIL, or SKIP. |
.Duration | time.Duration | Duration of all test runs in this package. |
.Coverage | *float64 | If coverage data was provided, this indicates the code coverage percentage. |
.Output | string | Additional output from failures. (e.g. syntax error indications) |
.TestCases | []TestCase | A list of test case results. |
.Reason | string | Text explaining the failure. Empty in most cases. |
.StartTime | *time.Time | A pointer to a time object when the package was first seen in the output. May be nil. |
.EndTime | *time.Time | A pointer to the time object when the package was last seen in the output. May be nil. |
.Settings | RenderSettings | The render settings (what to hide, etc, see below). |
Test cases have the following format:
| Variable | Type | Description |
|---|---|---|
.Name | string | Name of the test case. May contain slashes (/) if subtests are run. |
.Result | string | Result of the test. Can be PASS, FAIL, or SKIP. |
.Duration | time.Duration | Duration of all test runs in this package. |
.Output | string | Log output from the test. |
.StartTime | *time.Time | A pointer to a time object when the test case was first seen in the output. May be nil. |
.EndTime | *time.Time | A pointer to the time object when the test case was last seen in the output. May be nil. |
Render settings
Render settings are available in all templates. They have the following fields:
| Variable | Type | Description |
|---|---|---|
.HideSuccessfulDownloads | bool | Hide successful package downloads from the output. |
.HideSuccessfulPackages | bool | Hide all packages that have only successful tests from the output. |
.HideEmptyPackages | bool | Hide the packages from the output that have no test cases. |
.HideSuccessfulTests | bool | Hide all tests from the output that are successful. |
.ShowTestStatus | bool | Show the test status next to the icons (PASS, FAIL, SKIP). |
.Formatter | string | Path to the formatter to be used. This formatter can be invoked by calling formatTestOutput outputHere .Settings. |
FAQ
How do I make the output less verbose?
By default, gotestfmt will output all tests and their logs. However, you can use the -hide function to hide certain aspects of the output. It accepts a comma-separated list of the following values:
successful-tests: Hide successful tests.successful-downloads: Hide successful dependency downloads.successful-packages: Hide packages with only successful tests.empty-packages: Hide packages that have no tests.all: Hide all non-error items.
ā ļø This feature depends on the template you use. If you customized your template please make sure to check the Render settings object in your code.
How do I format the log lines within a test?
Gotestfmt starting with version 2.2.0 supports running external formatters:
go test -json -v ./... 2>&1 | gotestfmt -formatter "/path/to/your/formatter"
The formatter will be called for each individual test case separately and the entire output of the test case will be passed to the formatter on the standard input. The formatter can then write the modified test output to the standard output. The formatter has 10 seconds to finish the test case, otherwise it will be terminated.
You can find a sample formatter written in Go in cmd/gotestfmt-formatter/main.go.
Why does gotestfmt exit with a non-zero status?
As of version 2.3.0 gotestfmt returns with a non-zero exit status when one or more tests fail. We added this behavior to make sure your CI doesn't pass on failing tests if you forget the set -euo pipefail option. You can disable this behavior by passing the -nofail parameter in the command line.
How do I know what the icons mean in the output?
The icons are based on the output of go test -json. They map to the values from the test2json package (PASS, FAIL, SKIP).
You can use the -showteststatus flag to output the words next to the icons.
Can I use gotestfmt without -json?
When running go test without -json the output does not properly contain the package names for each line. This is not a problem if you are running tests only on a single package, but lines become mixed up when running tests on multiple packages. Version 1 of gotestfmt supported the raw output, but version 2 dropped support for it because it results in a lot of unmaintainable code based on an undocumented format.
If you need to use gotestfmt without using the -json flag, please use version 1 of gotestfmt. However, it may break, and we may not be able to fix it.
Does gotestfmt work with Ginkgo?
Ginkgo has its own output format which is not compatible with go test. This choice is understandable because the go test output format is not properly documented and is also very difficult to work with. However, this means that gotestfmt does not support Ginkgo.
But, fear not! Ginkgo has a large number of formats it supports using reporters, such as writing jUnit XML reports. Alternatively, you can even write your own.
I don't like gotestfmt. What else can I use?
There are more awesome tools out there:
Who uses gotestfmt?
To add your name here simply click the pen icon on top of this box. Please use alphabetic order.
Architecture
Gotestfmt takes the output from go test, parses it and reformats it with the templates located in the .gotestfmt directory, or baked into the application.
This application has 3 main pieces: the tokenizer, the parser, and the renderer. All of them run in separate goroutines and pipeline data using channels.
The tokenizer takes the raw output from go test and turns it into a stream of events that can be consumed.
The parser takes the tokens from the tokenizer and interprets them, constructing logical units for test cases, packages, and package downloads.
Finally, the renderer takes the two streams from the parser and renders them into human-readable text templates, which are then streamed out to the main application for writing.
Building
If you wish to build gotestfmt for yourself you'll need at least Go 1.16. You can then build it by running go build cmd/gotestfmt.
License
This project is licensed under the Unlicense, you are free to do with it as you please. It has no external dependencies.