path: root/swarm/shed/field_struct_test.go

// Copyright 2018 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.

package shed

import (
    "testing"

    "github.com/syndtr/goleveldb/leveldb"
)

// TestStructField validates put and get operations
// of the StructField.
func TestStructField(t *testing.T) {
    db, cleanupFunc := newTestDB(t)
    defer cleanupFunc()

    complexField, err := db.NewStructField("complex-field")
    if err != nil {
        t.Fatal(err)
    }

    type complexStructure struct {
        A string
    }

    t.Run("get empty", func(t *testing.T) {
        var s complexStructure
        err := complexField.Get(&s)
        if err != leveldb.ErrNotFound {
            t.Fatalf("got error %v, want %v", err, leveldb.ErrNotFound)
        }
        want := ""
        if s.A != want {
            t.Errorf("got string %q, want %q", s.A, want)
        }
    })

    t.Run("put", func(t *testing.T) {
        want := complexStructure{
            A: "simple string value",
        }
        err = complexField.Put(want)
        if err != nil {
            t.Fatal(err)
        }
        var got complexStructure
        err = complexField.Get(&got)
        if err != nil {
            t.Fatal(err)
        }
        if got.A != want.A {
            t.Errorf("got string %q, want %q", got.A, want.A)
        }

        t.Run("overwrite", func(t *testing.T) {
            want := complexStructure{
                A: "overwritten string value",
            }
            err = complexField.Put(want)
            if err != nil {
                t.Fatal(err)
            }
            var got complexStructure
            err = complexField.Get(&got)
            if err != nil {
                t.Fatal(err)
            }
            if got.A != want.A {
                t.Errorf("got string %q, want %q", got.A, want.A)
            }
        })
    })

    t.Run("put in batch", func(t *testing.T) {
        batch := new(leveldb.Batch)
        want := complexStructure{
            A: "simple string batch value",
        }
        complexField.PutInBatch(batch, want)
        err = db.WriteBatch(batch)
        if err != nil {
            t.Fatal(err)
        }
        var got complexStructure
        err := complexField.Get(&got)
        if err != nil {
            t.Fatal(err)
        }
        if got.A != want.A {
            t.Errorf("got string %q, want %q", got, want)
        }

        t.Run("overwrite", func(t *testing.T) {
            batch := new(leveldb.Batch)
            want := complexStructure{
                A: "overwritten string batch value",
            }
            complexField.PutInBatch(batch, want)
            err = db.WriteBatch(batch)
            if err != nil {
                t.Fatal(err)
            }
            var got complexStructure
            err := complexField.Get(&got)
            if err != nil {
                t.Fatal(err)
            }
            if got.A != want.A {
                t.Errorf("got string %q, want %q", got, want)
            }
        })
    })
}