Refactoring the line parsing

scanner_test.go

@@ -0,0 +1,28 @@
+package ftp
+
+import "testing"
+import "github.com/stretchr/testify/assert"
+
+func TestScanner(t *testing.T) {
+	assert := assert.New(t)
+
+	s := NewScanner("foo  bar x  y")
+	assert.Equal("foo", s.Next())
+	assert.Equal(" bar x  y", s.Remaining())
+	assert.Equal("bar", s.Next())
+	assert.Equal("x  y", s.Remaining())
+	assert.Equal("x", s.Next())
+	assert.Equal(" y", s.Remaining())
+	assert.Equal("y", s.Next())
+	assert.Equal("", s.Next())
+	assert.Equal("", s.Remaining())
+}
+
+func TestScannerEmpty(t *testing.T) {
+	assert := assert.New(t)
+
+	s := NewScanner("")
+	assert.Equal("", s.Next())
+	assert.Equal("", s.Next())
+	assert.Equal("", s.Remaining())
+}