package job_compilers

import (
	"os"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestLoadScriptsFrom_skip_nonjs(t *testing.T) {
	s := Service{}

	thisDirFS := os.DirFS(".")
	assert.NoError(t, s.loadScriptsFrom(thisDirFS), "input without JS files should not cause errors")
	assert.Empty(t, s.compilers)
}

func TestLoadScriptsFrom_on_disk_js(t *testing.T) {
	s := Service{
		compilers: map[string]Compiler{},
	}

	scriptsFS := os.DirFS("scripts-for-unittest")
	assert.NoError(t, s.loadScriptsFrom(scriptsFS))
	expectKeys := map[string]bool{
		"echo-and-sleep":        true,
		"simple-blender-render": true,
	}
	assert.Equal(t, expectKeys, keys(s.compilers))
}

// keys returns the set of keys of the mapping.
func keys[K comparable, V any](mapping map[K]V) map[K]bool {
	keys := map[K]bool{}
	for k := range mapping {
		keys[k] = true
	}
	return keys
}