move crypto handshake stuff to its own package

crypto_stream_test.go

@@ -1,27 +0,0 @@
-package quic
-
-import (
-	"bytes"
-
-	. "github.com/onsi/ginkgo"
-	. "github.com/onsi/gomega"
-)
-
-var _ = Describe("CryptoStream", func() {
-	Context("when parsing", func() {
-		It("parses sample CHLO message", func() {
-			tag, msg, err := ParseCryptoMessage(sampleCHLO)
-			Expect(err).ToNot(HaveOccurred())
-			Expect(tag).To(Equal(TagCHLO))
-			Expect(msg).To(Equal(sampleCHLOMap))
-		})
-	})
-
-	Context("when writing", func() {
-		It("writes sample message", func() {
-			b := &bytes.Buffer{}
-			WriteCryptoMessage(b, TagCHLO, sampleCHLOMap)
-			Expect(b.Bytes()).To(Equal(sampleCHLO))
-		})
-	})
-})