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130 lines
4.0 KiB
130 lines
4.0 KiB
package lite_test
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import (
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/types"
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"github.com/tendermint/tendermint/lite"
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"github.com/tendermint/tendermint/lite/errors"
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)
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// TestDynamicCert just makes sure it still works like StaticCert
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func TestDynamicCert(t *testing.T) {
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// assert, require := assert.New(t), require.New(t)
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assert := assert.New(t)
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// require := require.New(t)
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keys := lite.GenValKeys(4)
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// 20, 30, 40, 50 - the first 3 don't have 2/3, the last 3 do!
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vals := keys.ToValidators(20, 10)
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// and a certifier based on our known set
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chainID := "test-dyno"
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cert := lite.NewDynamic(chainID, vals, 0)
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cases := []struct {
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keys lite.ValKeys
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vals *types.ValidatorSet
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height int
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first, last int // who actually signs
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proper bool // true -> expect no error
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changed bool // true -> expect validator change error
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}{
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// perfect, signed by everyone
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{keys, vals, 1, 0, len(keys), true, false},
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// skip little guy is okay
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{keys, vals, 2, 1, len(keys), true, false},
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// but not the big guy
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{keys, vals, 3, 0, len(keys) - 1, false, false},
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// even changing the power a little bit breaks the static validator
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// the sigs are enough, but the validator hash is unknown
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{keys, keys.ToValidators(20, 11), 4, 0, len(keys), false, true},
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}
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for _, tc := range cases {
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check := tc.keys.GenCommit(chainID, tc.height, nil, tc.vals,
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[]byte("bar"), tc.first, tc.last)
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err := cert.Certify(check)
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if tc.proper {
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assert.Nil(err, "%+v", err)
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assert.Equal(cert.LastHeight(), tc.height)
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} else {
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assert.NotNil(err)
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if tc.changed {
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assert.True(errors.IsValidatorsChangedErr(err), "%+v", err)
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}
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}
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}
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}
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// TestDynamicUpdate makes sure we update safely and sanely
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func TestDynamicUpdate(t *testing.T) {
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assert, require := assert.New(t), require.New(t)
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chainID := "test-dyno-up"
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keys := lite.GenValKeys(5)
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vals := keys.ToValidators(20, 0)
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cert := lite.NewDynamic(chainID, vals, 40)
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// one valid block to give us a sense of time
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h := 100
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good := keys.GenCommit(chainID, h, nil, vals, []byte("foo"), 0, len(keys))
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err := cert.Certify(good)
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require.Nil(err, "%+v", err)
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// some new sets to try later
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keys2 := keys.Extend(2)
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keys3 := keys2.Extend(4)
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// we try to update with some blocks
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cases := []struct {
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keys lite.ValKeys
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vals *types.ValidatorSet
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height int
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first, last int // who actually signs
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proper bool // true -> expect no error
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changed bool // true -> expect too much change error
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}{
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// same validator set, well signed, of course it is okay
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{keys, vals, h + 10, 0, len(keys), true, false},
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// same validator set, poorly signed, fails
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{keys, vals, h + 20, 2, len(keys), false, false},
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// shift the power a little, works if properly signed
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{keys, keys.ToValidators(10, 0), h + 30, 1, len(keys), true, false},
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// but not on a poor signature
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{keys, keys.ToValidators(10, 0), h + 40, 2, len(keys), false, false},
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// and not if it was in the past
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{keys, keys.ToValidators(10, 0), h + 25, 0, len(keys), false, false},
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// let's try to adjust to a whole new validator set (we have 5/7 of the votes)
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{keys2, keys2.ToValidators(10, 0), h + 33, 0, len(keys2), true, false},
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// properly signed but too much change, not allowed (only 7/11 validators known)
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{keys3, keys3.ToValidators(10, 0), h + 50, 0, len(keys3), false, true},
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}
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for _, tc := range cases {
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fc := tc.keys.GenFullCommit(chainID, tc.height, nil, tc.vals,
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[]byte("bar"), tc.first, tc.last)
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err := cert.Update(fc)
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if tc.proper {
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assert.Nil(err, "%d: %+v", tc.height, err)
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// we update last seen height
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assert.Equal(cert.LastHeight(), tc.height)
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// and we update the proper validators
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assert.EqualValues(fc.Header.ValidatorsHash, cert.Hash())
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} else {
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assert.NotNil(err, "%d", tc.height)
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// we don't update the height
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assert.NotEqual(cert.LastHeight(), tc.height)
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if tc.changed {
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assert.True(errors.IsTooMuchChangeErr(err),
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"%d: %+v", tc.height, err)
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}
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}
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}
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}
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