improve utils tests to 100% coverage

utils/float16_test.go

@@ -2,6 +2,7 @@ package utils
 
 import (
 	"bytes"
+	"io"
 
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
@@ -66,6 +67,11 @@ var _ = Describe("float16", func() {
 		}
 	})
 
+	It("errors on eof", func() {
+		_, err := ReadUfloat16(&bytes.Buffer{})
+		Expect(err).To(MatchError(io.EOF))
+	})
+
 	It("writes", func() {
 		testcases := []struct {
 			decoded uint64