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

This reverts commit 96a3502

types/results_test.go

@@ -0,0 +1,43 @@
+package types
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestABCIResults(t *testing.T) {
+	a := ABCIResult{Code: 0, Data: nil}
+	b := ABCIResult{Code: 0, Data: []byte{}}
+	c := ABCIResult{Code: 0, Data: []byte("one")}
+	d := ABCIResult{Code: 14, Data: nil}
+	e := ABCIResult{Code: 14, Data: []byte("foo")}
+	f := ABCIResult{Code: 14, Data: []byte("bar")}
+
+	// Nil and []byte{} should produce the same hash.
+	require.Equal(t, a.Hash(), a.Hash())
+	require.Equal(t, b.Hash(), b.Hash())
+	require.Equal(t, a.Hash(), b.Hash())
+
+	// a and b should be the same, don't go in results.
+	results := ABCIResults{a, c, d, e, f}
+
+	// Make sure each result hashes properly.
+	var last []byte
+	for i, res := range results {
+		h := res.Hash()
+		assert.NotEqual(t, last, h, "%d", i)
+		last = h
+	}
+
+	// Make sure that we can get a root hash from results and verify proofs.
+	root := results.Hash()
+	assert.NotEmpty(t, root)
+
+	for i, res := range results {
+		proof := results.ProveResult(i)
+		valid := proof.Verify(i, len(results), res.Hash(), root)
+		assert.True(t, valid, "%d", i)
+	}
+}