package test

import (
	"testing"
	"caj-larsson/bog/domain"
)


func TestMockFileRepo(t *testing.T) {
	BogFileRepositoryContract(NewMockFileRepository, t)
}


func BogFileRepositoryContract(fac func() domain.FileDataRepository, t *testing.T) {
	basicFileOperationContract(fac, t)
}


func basicFileOperationContract(fac func() domain.FileDataRepository, t *testing.T) {
	repo := fac()

	not_file, err := repo.Open("doesnot", "exist")

	if err != domain.ErrNotExists  || not_file != nil{
		t.Errorf("Must raise not exists and file must not open")
	}

	new_file, err := repo.Create("newfile.new", "ua1")

	if err != nil  || new_file == nil {
		t.Errorf("Create ")
	}

	var testdata = "testingdata"

	new_file.Write([]byte(testdata))
	new_file.Close()

	reopened_file, err := repo.Open("newfile.new", "ua1")

	if err != nil  || reopened_file == nil{
		t.Errorf("Must open existing files")
	}

	readback := make([]byte, 128)

	size, err := reopened_file.Read(readback)

	if string(readback[0:size]) != testdata {
		t.Errorf("Must contain previously stored data '%s' '%s'", string(readback), testdata)
	}

	reopened_file.Close()

	repo.Delete("newfile.new", "ua1")

	deleted_file, err := repo.Open("newfile.new", "ua1")

	if err != domain.ErrNotExists  || deleted_file != nil{
		t.Errorf("Must open existing files")
	}
}