package metrics

import "testing"

func TestGetMaxFilesLimit(t *testing.T){
	f := func(want uint64,path string, wantErr bool) {
		t.Helper()
		got, err := getMaxFilesLimit(path)
		if err != nil && !wantErr {
			t.Fatalf("unexpected error: %v",err)
		}
		if got != want{
			t.Fatalf("unexpected result: %d, want: %d at getMaxFilesLimit",got,want)
		}

	}
	f(1024,"testdata/limits",false)
	f(0,"testdata/bad_path",true)
	f(0,"testdata/limits_bad",true)
}


func TestGetOpenFDsCount(t *testing.T){
	f := func(want uint64,path string, wantErr bool) {
		t.Helper()
		got, err := getOpenFDsCount(path)
		if (err != nil && !wantErr)|| (err == nil && wantErr) {
			t.Fatalf("unexpected error: %v",err)
		}
		if got != want{
			t.Fatalf("unexpected result: %d, want: %d at getOpenFDsCount",got,want)
		}
	}
	f(5,"testdata/fd/",false)
	f(0,"testdata/fd/0",true)
	f(0,"testdata/limits",true)
}