Copy certifiers from light-client

certifiers/static_test.go

@@ -0,0 +1,59 @@
+package certifiers_test
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+
+	"github.com/tendermint/tendermint/types"
+
+	"github.com/tendermint/tendermint/certifiers"
+	errors "github.com/tendermint/tendermint/certifiers/errors"
+)
+
+func TestStaticCert(t *testing.T) {
+	// assert, require := assert.New(t), require.New(t)
+	assert := assert.New(t)
+	// require := require.New(t)
+
+	keys := certifiers.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-static"
+	cert := certifiers.NewStatic(chainID, vals)
+
+	cases := []struct {
+		keys        certifiers.ValKeys
+		vals        *types.ValidatorSet
+		height      int
+		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("foo"), tc.first, tc.last)
+		err := cert.Certify(check)
+		if tc.proper {
+			assert.Nil(err, "%+v", err)
+		} else {
+			assert.NotNil(err)
+			if tc.changed {
+				assert.True(errors.IsValidatorsChangedErr(err), "%+v", err)
+			}
+		}
+	}
+
+}