Repaired old unit tests. Added unit test for span buffers ... which currently fails. :-/

common/spans.go

@@ -4,6 +4,11 @@
 
 package common
 
+import (
+	"bytes"
+	"fmt"
+)
+
 const chunkSize = 1024
 
 type Span struct {
@@ -184,3 +189,31 @@ func (sp *SpanPool) Insert(s *Span, pos, value int32) *Span {
 
 	return head
 }
+
+func (s *Span) Visit(v func(*Span)) {
+	for ; s != nil; s = s.Next {
+		v(s)
+	}
+}
+
+func (s *Span) Len() int {
+	n := 0
+	for ; s != nil; s = s.Next {
+		n++
+	}
+	return n
+}
+
+func (s *Span) String() string {
+	var buf bytes.Buffer
+	first := true
+	s.Visit(func(s1 *Span) {
+		if !first {
+			buf.WriteString(", ")
+		} else {
+			first = false
+		}
+		buf.WriteString(fmt.Sprintf("(%d, %d)", s1.From, s1.To))
+	})
+	return buf.String()
+}