UseTesting

Detects when some calls can be replaced by methods from the testing package.

Usages

Inside golangci-lint

Recommended.

linters-settings:
  usetesting:
    # Enable/disable `context.Background()` detections.
    # Disabled if Go < 1.24.
    # Default: true
    context-background: false

    # Enable/disable `context.TODO()` detections.
    # Disabled if Go < 1.24.
    # Default: true
    context-todo: false

    # Enable/disable `os.Chdir()` detections.
    # Disabled if Go < 1.24.
    # Default: true
    os-chdir: false

    # Enable/disable `os.MkdirTemp()` detections.
    # Default: true
    os-mkdir-temp: false

    # Enable/disable `os.Setenv()` detections.
    # Default: false
    os-setenv: true

As a CLI

usetesting: Reports uses of functions with replacement inside the testing package.

Usage: usetesting [-flag] [package]

Flags:
  -contextbackground
        Enable/disable context.Background() detections (default true)
  -contexttodo
        Enable/disable context.TODO() detections (default true)
  -oschdir
        Enable/disable os.Chdir() detections (default true)
  -osmkdirtemp
        Enable/disable os.MkdirTemp() detections (default true)
  -ossetenv
        Enable/disable os.Setenv() detections (default true)
...

Examples

os.MkdirTemp

func TestExample(t *testing.T) {
    os.MkdirTemp("", "")
    // ...
}

It can be replaced by:

func TestExample(t *testing.T) {
    t.TempDir()
    // ...
}

os.Setenv

func TestExample(t *testing.T) {
    os.Setenv("", "")
    // ...
}

It can be replaced by:

func TestExample(t *testing.T) {
    t.Setenv("", "")
    // ...
}

os.Chdir (Go >= 1.24)

func TestExample(t *testing.T) {
    os.Chdir("")
    // ...
}

It can be replaced by:

func TestExample(t *testing.T) {
    t.Chdir("")
    // ...
}

context.Background (Go >= 1.24)

func TestExample(t *testing.T) {
    ctx := context.Background()
    // ...
}

It can be replaced by:

func TestExample(t *testing.T) {
    ctx := t.Context()
    // ...
}

context.TODO (Go >= 1.24)

func TestExample(t *testing.T) {
    ctx := context.TODO()
    // ...
}

It can be replaced by:

func TestExample(t *testing.T) {
    ctx := t.Context()
    // ...
}

References

• https://tip.golang.org/doc/go1.24#testingpkgtesting