Revert "delete everything" (includes everything non-go-crypto)

This reverts commit 96a3502

lite/dynamic_certifier_test.go

@@ -0,0 +1,130 @@
+package lite_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/tendermint/tendermint/types"
+
+	"github.com/tendermint/tendermint/lite"
+	"github.com/tendermint/tendermint/lite/errors"
+)
+
+// TestDynamicCert just makes sure it still works like StaticCert
+func TestDynamicCert(t *testing.T) {
+	// assert, require := assert.New(t), require.New(t)
+	assert := assert.New(t)
+	// require := require.New(t)
+
+	keys := lite.GenValKeys(4)
+	// 20, 30, 40, 50 - the first 3 don't have 2/3, the last 3 do!
+	vals := keys.ToValidators(20, 10)
+	// and a certifier based on our known set
+	chainID := "test-dyno"
+	cert := lite.NewDynamicCertifier(chainID, vals, 0)
+
+	cases := []struct {
+		keys        lite.ValKeys
+		vals        *types.ValidatorSet
+		height      int64
+		first, last int  // who actually signs
+		proper      bool // true -> expect no error
+		changed     bool // true -> expect validator change error
+	}{
+		// perfect, signed by everyone
+		{keys, vals, 1, 0, len(keys), true, false},
+		// skip little guy is okay
+		{keys, vals, 2, 1, len(keys), true, false},
+		// but not the big guy
+		{keys, vals, 3, 0, len(keys) - 1, false, false},
+		// even changing the power a little bit breaks the static validator
+		// the sigs are enough, but the validator hash is unknown
+		{keys, keys.ToValidators(20, 11), 4, 0, len(keys), false, true},
+	}
+
+	for _, tc := range cases {
+		check := tc.keys.GenCommit(chainID, tc.height, nil, tc.vals,
+			[]byte("bar"), []byte("params"), []byte("results"), tc.first, tc.last)
+		err := cert.Certify(check)
+		if tc.proper {
+			assert.Nil(err, "%+v", err)
+			assert.Equal(cert.LastHeight(), tc.height)
+		} else {
+			assert.NotNil(err)
+			if tc.changed {
+				assert.True(errors.IsValidatorsChangedErr(err), "%+v", err)
+			}
+		}
+	}
+}
+
+// TestDynamicUpdate makes sure we update safely and sanely
+func TestDynamicUpdate(t *testing.T) {
+	assert, require := assert.New(t), require.New(t)
+
+	chainID := "test-dyno-up"
+	keys := lite.GenValKeys(5)
+	vals := keys.ToValidators(20, 0)
+	cert := lite.NewDynamicCertifier(chainID, vals, 40)
+
+	// one valid block to give us a sense of time
+	h := int64(100)
+	good := keys.GenCommit(chainID, h, nil, vals, []byte("foo"), []byte("params"), []byte("results"), 0, len(keys))
+	err := cert.Certify(good)
+	require.Nil(err, "%+v", err)
+
+	// some new sets to try later
+	keys2 := keys.Extend(2)
+	keys3 := keys2.Extend(4)
+
+	// we try to update with some blocks
+	cases := []struct {
+		keys        lite.ValKeys
+		vals        *types.ValidatorSet
+		height      int64
+		first, last int  // who actually signs
+		proper      bool // true -> expect no error
+		changed     bool // true -> expect too much change error
+	}{
+		// same validator set, well signed, of course it is okay
+		{keys, vals, h + 10, 0, len(keys), true, false},
+		// same validator set, poorly signed, fails
+		{keys, vals, h + 20, 2, len(keys), false, false},
+
+		// shift the power a little, works if properly signed
+		{keys, keys.ToValidators(10, 0), h + 30, 1, len(keys), true, false},
+		// but not on a poor signature
+		{keys, keys.ToValidators(10, 0), h + 40, 2, len(keys), false, false},
+		// and not if it was in the past
+		{keys, keys.ToValidators(10, 0), h + 25, 0, len(keys), false, false},
+
+		// let's try to adjust to a whole new validator set (we have 5/7 of the votes)
+		{keys2, keys2.ToValidators(10, 0), h + 33, 0, len(keys2), true, false},
+
+		// properly signed but too much change, not allowed (only 7/11 validators known)
+		{keys3, keys3.ToValidators(10, 0), h + 50, 0, len(keys3), false, true},
+	}
+
+	for _, tc := range cases {
+		fc := tc.keys.GenFullCommit(chainID, tc.height, nil, tc.vals,
+			[]byte("bar"), []byte("params"), []byte("results"), tc.first, tc.last)
+		err := cert.Update(fc)
+		if tc.proper {
+			assert.Nil(err, "%d: %+v", tc.height, err)
+			// we update last seen height
+			assert.Equal(cert.LastHeight(), tc.height)
+			// and we update the proper validators
+			assert.EqualValues(fc.Header.ValidatorsHash, cert.Hash())
+		} else {
+			assert.NotNil(err, "%d", tc.height)
+			// we don't update the height
+			assert.NotEqual(cert.LastHeight(), tc.height)
+			if tc.changed {
+				assert.True(errors.IsTooMuchChangeErr(err),
+					"%d: %+v", tc.height, err)
+			}
+		}
+	}
+}