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|
package runner_test
import (
"bytes"
"context"
"errors"
"flag"
"io"
"reflect"
"strings"
"testing"
"go.sudomsg.com/kit/runner"
)
func TestCommandSet_Run(t *testing.T) {
t.Run("Dispatch", func(t *testing.T) {
t.Parallel()
ctx := t.Context()
var called bool
cs := &runner.CommandSet{
FlagSet: flag.NewFlagSet("test", flag.ContinueOnError),
}
cs.SetOutput(io.Discard)
cs.AddSubcommand("foo", "foo command", func(ctx context.Context, cs *runner.CommandSet, args []string) error {
called = true
if !reflect.DeepEqual(args, []string{"bar", "baz"}) {
t.Fatalf("callback got args %v, want [bar baz]", args)
}
if gotName := cs.Name(); gotName != "foo" {
t.Fatalf("sub FlagSet name = %q, want %q", gotName, "foo")
}
return nil
})
err := cs.Run(ctx, []string{"foo", "bar", "baz"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if !called {
t.Fatal("expected foo subcommand to be called")
}
})
t.Run("Recursive Dispatch", func(t *testing.T) {
t.Parallel()
ctx := t.Context()
var called bool
cs := &runner.CommandSet{
FlagSet: flag.NewFlagSet("test", flag.ContinueOnError),
}
cs.SetOutput(io.Discard)
cs.AddSubcommand("foo", "foo command", func(ctx context.Context, cs *runner.CommandSet, args []string) error {
cs.AddSubcommand("bar", "bar command", func(ctx context.Context, cs *runner.CommandSet, args []string) error {
called = true
if !reflect.DeepEqual(args, []string{"baz"}) {
t.Fatalf("callback got args %v, want [bar baz]", args)
}
if gotName := cs.Name(); gotName != "bar" {
t.Fatalf("sub FlagSet name = %q, want %q", gotName, "foo")
}
return nil
})
return cs.Run(ctx, args)
})
err := cs.Run(ctx, []string{"foo", "bar", "baz"})
if err != nil {
t.Fatalf("unexpected error: %v", err)
}
if !called {
t.Fatal("expected foo subcommand to be called")
}
})
t.Run("No Subcommand", func(t *testing.T) {
t.Parallel()
ctx := t.Context()
var buf bytes.Buffer
cs := &runner.CommandSet{
FlagSet: flag.NewFlagSet("test", flag.ContinueOnError),
}
cs.SetOutput(&buf)
err := cs.Run(ctx, []string{})
if err == nil {
t.Fatal("expected error, got nil")
}
var ue runner.UsageError
if !errors.As(err, &ue) {
t.Fatalf("expected UsageError, got %T", err)
}
if !strings.Contains(buf.String(), "Missing Subcommand") {
t.Errorf("expected help output to mention missing subcommand, got %q", buf.String())
}
})
t.Run("Invalid Subcommand", func(t *testing.T) {
t.Parallel()
ctx := t.Context()
var buf bytes.Buffer
cs := &runner.CommandSet{
FlagSet: flag.NewFlagSet("test", flag.ContinueOnError),
}
cs.SetOutput(&buf)
cs.AddSubcommand("foo", "bar", func(ctx context.Context, cs *runner.CommandSet, args []string) error {
t.Fatalf("foo command called")
return nil
})
err := cs.Run(ctx, []string{"nope"})
if err == nil {
t.Fatal("expected error, got nil")
}
var ue runner.UsageError
if !errors.As(err, &ue) {
t.Fatalf("expected UsageError, got %T", err)
}
if !strings.Contains(buf.String(), "Invalid Subcommand") {
t.Errorf("expected help output to mention invalid subcommand, got %q", buf.String())
}
})
t.Run("Invalid Flags", func(t *testing.T) {
t.Parallel()
ctx := t.Context()
var buf bytes.Buffer
cs := &runner.CommandSet{
FlagSet: flag.NewFlagSet("test", flag.ContinueOnError),
}
cs.SetOutput(&buf)
cs.AddSubcommand("foo", "foo command", func(ctx context.Context, cs *runner.CommandSet, args []string) error {
return cs.Run(ctx, args)
})
err := cs.Run(ctx, []string{"foo", "-bar"})
if err == nil {
t.Fatal("expected error, got nil")
}
var ue runner.UsageError
if !errors.As(err, &ue) {
t.Fatalf("expected UsageError, got %T", err)
}
})
}
|
