server(filesystem): fix panic with archive Progress

server/filesystem/archive_test.go

@@ -0,0 +1,48 @@
+package filesystem
+
+import (
+	"bytes"
+	"testing"
+
+	. "github.com/franela/goblin"
+)
+
+func TestProgress(t *testing.T) {
+	g := Goblin(t)
+
+	g.Describe("Progress", func() {
+		g.It("properly initializes", func() {
+			total := int64(1000)
+			p := NewProgress(total)
+			g.Assert(p).IsNotNil()
+			g.Assert(p.Total()).Equal(total)
+			g.Assert(p.Written()).Equal(int64(0))
+		})
+
+		g.It("increments written when Write is called", func() {
+			v := []byte("hello")
+			p := NewProgress(1000)
+			_, err := p.Write(v)
+			g.Assert(err).IsNil()
+			g.Assert(p.Written()).Equal(int64(len(v)))
+		})
+
+		g.It("renders a progress bar", func() {
+			v := bytes.Repeat([]byte{' '}, 100)
+			p := NewProgress(1000)
+			_, err := p.Write(v)
+			g.Assert(err).IsNil()
+			g.Assert(p.Written()).Equal(int64(len(v)))
+			g.Assert(p.Progress(25)).Equal("[==                       ] 100 B / 1000 B")
+		})
+
+		g.It("renders a progress bar when written exceeds total", func() {
+			v := bytes.Repeat([]byte{' '}, 1001)
+			p := NewProgress(1000)
+			_, err := p.Write(v)
+			g.Assert(err).IsNil()
+			g.Assert(p.Written()).Equal(int64(len(v)))
+			g.Assert(p.Progress(25)).Equal("[=========================] 1001 B / 1000 B")
+		})
+	})
+}