package cache_manager

import (
	"path/filepath"
	"testing"
)

func TestNewCacheManagerFailsIfNonExistentRoot(t *testing.T) {
	nonPath := "/not/a/path"

	mgr, err := NewCacheManager(nonPath)

	if err == nil {
		t.Error("Expected error, got nil.")
	}

	if mgr != nil {
		t.Error("Expected nil manager, got non-nil.")
	}
}

func TestNewCacheManagerReturnsCacheManagerPointer(t *testing.T) {
	mgr, err := NewCacheManager(t.TempDir())

	if err != nil {
		t.Errorf("Expected nil error, got %s.", err)
	}

	if mgr == nil {
		t.Error("Expected non-nil manager, got nil.")
	}
}

func TestCacheManagerPathReturnsPathRootedAtCacheRoot(t *testing.T) {
	tmpRoot := t.TempDir()
	mgr, _ := NewCacheManager(tmpRoot)

	rootedPath := mgr.Path("test")
	expectedPath := filepath.Join(tmpRoot, "test")

	if rootedPath != expectedPath {
		t.Errorf("Expected %s, got %s.", expectedPath, rootedPath)
	}
}