// vfs/memory/memory_test.go
package memory

import (
	"fmt"
	"io"
	"s1d3sw1ped/SteamCache2/vfs/vfserror"
	"testing"
)

func TestAllMemory(t *testing.T) {
	t.Parallel()

	m := New(1024)
	w, err := m.Create("key", 5)
	if err != nil {
		t.Errorf("Create failed: %v", err)
	}
	w.Write([]byte("value"))
	w.Close()

	w, err = m.Create("key", 6)
	if err != nil {
		t.Errorf("Create failed: %v", err)
	}
	w.Write([]byte("value1"))
	w.Close()

	rc, err := m.Open("key")
	if err != nil {
		t.Errorf("Open failed: %v", err)
	}
	d, _ := io.ReadAll(rc)
	rc.Close()
	if string(d) != "value1" {
		t.Errorf("Get failed: got %s, want %s", d, "value1")
	}

	if err := m.Delete("key"); err != nil {
		t.Errorf("Delete failed: %v", err)
	}

	if _, err := m.Open("key"); err == nil {
		t.Errorf("Open failed: got nil, want %v", vfserror.ErrNotFound)
	}

	if err := m.Delete("key"); err == nil {
		t.Errorf("Delete failed: got nil, want %v", vfserror.ErrNotFound)
	}

	if _, err := m.Stat("key"); err == nil {
		t.Errorf("Stat failed: got nil, want %v", vfserror.ErrNotFound)
	}

	w, err = m.Create("key", 5)
	if err != nil {
		t.Errorf("Create failed: %v", err)
	}
	w.Write([]byte("value"))
	w.Close()

	if _, err := m.Stat("key"); err != nil {
		t.Errorf("Stat failed: %v", err)
	}
}

func TestLimited(t *testing.T) {
	t.Parallel()

	m := New(10)
	for i := 0; i < 11; i++ {
		w, err := m.Create(fmt.Sprintf("key%d", i), 1)
		if err != nil && i < 10 {
			t.Errorf("Create failed: %v", err)
		} else if i == 10 && err == nil {
			t.Errorf("Create succeeded: got nil, want %v", vfserror.ErrDiskFull)
		}
		if i < 10 {
			w.Write([]byte("1"))
			w.Close()
		}
	}
}