package main

import (
	"errors"
	"testing"
)

func TestFormatDoltAutoCommitMessage(t *testing.T) {
	msg := formatDoltAutoCommitMessage("update", "alice", []string{"bd-2", "bd-1", "bd-2", "", "bd-3"})
	if msg != "bd: update (auto-commit) by alice [bd-1, bd-2, bd-3]" {
		t.Fatalf("unexpected message: %q", msg)
	}

	// Caps IDs (max 5) and sorts
	msg = formatDoltAutoCommitMessage("create", "bob", []string{"z-9", "a-1", "m-3", "b-2", "c-4", "d-5", "e-6"})
	if msg != "bd: create (auto-commit) by bob [a-1, b-2, c-4, d-5, e-6]" {
		t.Fatalf("unexpected capped message: %q", msg)
	}

	// Empty command/actor fallbacks
	msg = formatDoltAutoCommitMessage("", "", nil)
	if msg != "bd: write (auto-commit) by unknown" {
		t.Fatalf("unexpected fallback message: %q", msg)
	}
}

func TestIsDoltNothingToCommit(t *testing.T) {
	if isDoltNothingToCommit(nil) {
		t.Fatal("nil error should not be treated as nothing-to-commit")
	}
	if !isDoltNothingToCommit(errors.New("nothing to commit")) {
		t.Fatal("expected nothing-to-commit to be detected")
	}
	if !isDoltNothingToCommit(errors.New("No changes to commit")) {
		t.Fatal("expected no-changes-to-commit to be detected")
	}
	if isDoltNothingToCommit(errors.New("permission denied")) {
		t.Fatal("unexpected classification")
	}
}