package cli_test

import (
	"bytes"
	"runtime"
	"strings"
	"testing"

	"sneak.berlin/go/simplexcalc/internal/cli"
)

func TestVersionPrintsVersion(t *testing.T) {
	t.Parallel()

	var stdout, stderr bytes.Buffer

	root := cli.RootCmd("1.2.3")
	root.SetArgs([]string{"version"})
	root.SetOut(&stdout)
	root.SetErr(&stderr)

	status := cli.Execute(root)
	if status != 0 {
		t.Fatalf("status = %d, want 0; stderr: %q", status, stderr.String())
	}

	want := "simplexcalc 1.2.3 " + runtime.GOOS + "/" + runtime.GOARCH + "\n"
	if stdout.String() != want {
		t.Errorf("stdout = %q, want %q", stdout.String(), want)
	}
}

func TestUnknownCommandFails(t *testing.T) {
	t.Parallel()

	var stdout, stderr bytes.Buffer

	root := cli.RootCmd("1.2.3")
	root.SetArgs([]string{"frobnicate"})
	root.SetOut(&stdout)
	root.SetErr(&stderr)

	status := cli.Execute(root)
	if status == 0 {
		t.Fatal("status = 0, want non-zero")
	}

	if !strings.HasPrefix(stderr.String(), "exiting: ") {
		t.Errorf("stderr = %q, want the error after \"exiting: \"", stderr.String())
	}
}