Merge pull request #849 from lucas-clemente/version-stringer

implement a string representation of the version number

internal/protocol/version.go

@@ -1,5 +1,7 @@
 package protocol
 
+import "fmt"
+
 // VersionNumber is a version number as int
 type VersionNumber int
 
@@ -27,6 +29,21 @@ func (vn VersionNumber) UsesTLS() bool {
 	return vn == VersionTLS
 }
 
+func (vn VersionNumber) String() string {
+	switch vn {
+	case VersionWhatever:
+		return "whatever"
+	case VersionUnsupported:
+		return "unsupported"
+	case VersionUnknown:
+		return "unknown"
+	case VersionTLS:
+		return "TLS dev version (WIP)"
+	default:
+		return fmt.Sprintf("%d", vn)
+	}
+}
+
 // VersionNumberToTag maps version numbers ('32') to tags ('Q032')
 func VersionNumberToTag(vn VersionNumber) uint32 {
 	v := uint32(vn)

internal/protocol/version_test.go

@@ -13,6 +13,16 @@ var _ = Describe("Version", func() {
 		Expect(VersionTLS.UsesTLS()).To(BeTrue())
 	})
 
+	It("has the right string representation", func() {
+		Expect(Version37.String()).To(Equal("37"))
+		Expect(Version38.String()).To(Equal("38"))
+		Expect(Version39.String()).To(Equal("39"))
+		Expect(VersionTLS.String()).To(ContainSubstring("TLS"))
+		Expect(VersionWhatever.String()).To(Equal("whatever"))
+		Expect(VersionUnsupported.String()).To(Equal("unsupported"))
+		Expect(VersionUnknown.String()).To(Equal("unknown"))
+	})
+
 	It("converts tags to numbers", func() {
 		Expect(VersionTagToNumber('Q' + '1'<<8 + '2'<<16 + '3'<<24)).To(Equal(VersionNumber(123)))
 	})