60 lines
1.4 KiB
Go
60 lines
1.4 KiB
Go
package db_test
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import (
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"sort"
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"testing"
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"github.com/stretchr/testify/require"
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dbm "github.com/cosmos/cosmos-sdk/db"
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)
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// Test that VersionManager satisfies the behavior of VersionSet
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func TestVersionManager(t *testing.T) {
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vm := dbm.NewVersionManager(nil)
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require.Equal(t, uint64(0), vm.Last())
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require.Equal(t, 0, vm.Count())
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require.True(t, vm.Equal(vm))
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require.False(t, vm.Exists(0))
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id1, err := vm.Save(0)
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require.NoError(t, err)
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require.Equal(t, uint64(1), id1)
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require.True(t, vm.Exists(id1))
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id2, err := vm.Save(0)
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require.NoError(t, err)
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require.True(t, vm.Exists(id2))
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id3, err := vm.Save(0)
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require.NoError(t, err)
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require.True(t, vm.Exists(id3))
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_, err = vm.Save(id1) // can't save existing id
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require.Error(t, err)
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id4, err := vm.Save(0)
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require.NoError(t, err)
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require.True(t, vm.Exists(id4))
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vm.Delete(id4)
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require.False(t, vm.Exists(id4))
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vm.Delete(id1)
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require.False(t, vm.Exists(id1))
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require.Equal(t, id2, vm.Initial())
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require.Equal(t, id3, vm.Last())
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var all []uint64
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for it := vm.Iterator(); it.Next(); {
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all = append(all, it.Value())
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}
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sort.Slice(all, func(i, j int) bool { return all[i] < all[j] })
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require.Equal(t, []uint64{id2, id3}, all)
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vmc := vm.Copy()
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id5, err := vmc.Save(0)
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require.NoError(t, err)
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require.False(t, vm.Exists(id5)) // true copy is made
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vm2 := dbm.NewVersionManager([]uint64{id2, id3})
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require.True(t, vm.Equal(vm2))
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}
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