Gotest Module for Dagger

A Dagger module that provides comprehensive Go testing capabilities with full control over test execution, build options, and test configurations.

Configuration 🛠️

Through the Dagger CLI, you can configure:

• ⚙️ version: Go version to use (e.g., "1.22.5"). Defaults to latest
• ⚙️ image: Custom Go image. Defaults to golang:alpine
• ⚙️ envVarsFromHost: Environment variables to pass from host
• ⚙️ ctr: Base container for customization

Features 🎨

Feature	Description	Example
Test Execution	Run Go tests with comprehensive options	dagger call test --source=. --cover=true
Build Configuration	Control build flags and options	dagger call test --race=true --buildTags="integration"
Test Filtering	Filter and control test execution	dagger call test --run="TestSpecific" --short=true
Profiling	CPU, memory, and block profiling	dagger call test --cpuprofile="cpu.prof"
Benchmarking	Run and configure benchmarks	dagger call test --benchmark="." --benchmem=true

Usage Examples 🚀

Basic Test Execution

dagger call test --source=. --enableDefaultOptions=true

With Coverage and Profiling

dagger call test \
  --source=. \
  --cover=true \
  --coverprofile="coverage.out" \
  --cpuprofile="cpu.prof" \
  --verbose=true

Race Detection and Build Tags

dagger call test \
  --source=. \
  --race=true \
  --buildTags="integration" \
  --ldflags="-X main.version=test"

Benchmark Testing

dagger call test \
  --source=. \
  --benchmark="." \
  --benchmem=true \
  --benchtime="1s" \
  --testCount=3

Available Options

Build Options

Option	Description
race	Enable race detection
msan	Enable memory sanitizer
asan	Enable address sanitizer
buildTags	Specify build constraints
ldflags	Set linker flags
gcflags	Set Go compiler flags
asmflags	Set assembler flags
trimpath	Remove file system paths
buildMode	Set build mode
compiler	Specify compiler
mod	Set module mode

Test Options

Option	Description
benchmark	Run benchmarks matching regexp
benchmem	Report memory allocations
benchtime	Run time for benchmarks
cover	Enable coverage analysis
coverprofile	Write coverage profile
cpuprofile	Write CPU profile
testCount	Run tests multiple times
failfast	Stop on first failure
enableJsonOutput	Enable JSON output
parallel	Set parallel test count
run	Run tests matching pattern
short	Run in short mode
timeout	Set test timeout
verbose	Enable verbose output

Environment Variables and Secrets

The module supports:

• Setting environment variables via envVars
• Passing secrets securely via secrets
• Inheriting environment variables from host via envVarsFromHost

Example:

dagger call test \
  --source=. \
  --envVars='["GO_ENV=test", "DEBUG=true"]' \
  --secrets='["MY_SECRET"]'

Testing 🧪

Run the test suite:

just test gotest

Developer Experience 🛠️

Development commands:

# Initialize pre-commit hooks
just run-hooks

# Run linting
just lintall gotest

# Run tests
just test gotest

# Run CI pipeline locally
just ci gotest

API Reference

Main Functions

RunTest

Executes Go tests with full configuration options:

RunTest(source *dagger.Directory, packages []string, envVars []string, secrets []*dagger.Secret, ...) (*dagger.Container, error)

RunTestCmd

Executes tests and returns command output:

RunTestCmd(source *dagger.Directory, packages []string, envVars []string, secrets []*dagger.Secret, ...) (string, error)

For detailed API documentation and more examples, see the Dagger documentation.