Added initial logic and tests for the Walker

walker_test.go

@@ -0,0 +1,147 @@
+package ftp
+
+import (
+	"fmt"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestFieldsReturnCorrectData(t *testing.T) {
+	w := Walker{
+		cur: item{
+			path: "/root/",
+			err:  fmt.Errorf("This is an error"),
+			entry: Entry{
+				Name: "root",
+				Size: 123,
+				Time: time.Now(),
+				Type: EntryTypeFolder,
+			},
+		},
+	}
+
+	assert.Equal(t, "This is an error", w.Err().Error())
+	assert.Equal(t, "/root/", w.Path())
+	assert.Equal(t, EntryTypeFolder, w.Stat().Type)
+}
+
+func TestSkipDirIsCorrectlySet(t *testing.T) {
+	w := Walker{}
+
+	w.SkipDir()
+
+	assert.Equal(t, false, w.descend)
+}
+
+func TestNoDescendDoesNotAddToStack(t *testing.T) {
+	w := new(Walker)
+	w.cur = item{
+		path: "/root/",
+		err:  nil,
+		entry: Entry{
+			Name: "root",
+			Size: 123,
+			Time: time.Now(),
+			Type: EntryTypeFolder,
+		},
+	}
+
+	w.stack = []item{
+		item{
+			path: "file",
+			err:  nil,
+			entry: Entry{
+				Name: "file",
+				Size: 123,
+				Time: time.Now(),
+				Type: EntryTypeFile,
+			},
+		},
+	}
+
+	w.SkipDir()
+
+	result := w.Step()
+
+	assert.Equal(t, true, result, "Result should return true")
+	assert.Equal(t, 1, len(w.stack))
+	assert.Equal(t, true, w.descend)
+}
+
+func TestEmptyStackReturnsFalse(t *testing.T) {
+	w := new(Walker)
+	w.cur = item{
+		path: "/root/",
+		err:  nil,
+		entry: Entry{
+			Name: "root",
+			Size: 123,
+			Time: time.Now(),
+			Type: EntryTypeFolder,
+		},
+	}
+
+	w.stack = []item{}
+
+	w.SkipDir()
+
+	result := w.Step()
+
+	assert.Equal(t, false, result, "Result should return false")
+}
+
+func TestCurAndStackSetCorrectly(t *testing.T) {
+	w := new(Walker)
+	w.cur = item{
+		path: "root/file1",
+		err:  nil,
+		entry: Entry{
+			Name: "file1",
+			Size: 123,
+			Time: time.Now(),
+			Type: EntryTypeFile,
+		},
+	}
+
+	w.stack = []item{
+		item{
+			path: "file",
+			err:  nil,
+			entry: Entry{
+				Name: "file",
+				Size: 123,
+				Time: time.Now(),
+				Type: EntryTypeFile,
+			},
+		},
+		item{
+			path: "root/file1",
+			err:  nil,
+			entry: Entry{
+				Name: "file1",
+				Size: 123,
+				Time: time.Now(),
+				Type: EntryTypeFile,
+			},
+		},
+	}
+
+	result := w.Step()
+	result = w.Step()
+
+	assert.Equal(t, true, result, "Result should return true")
+	assert.Equal(t, 0, len(w.stack))
+	assert.Equal(t, "file", w.cur.entry.Name)
+}
+
+func TestErrorsFromListAreHandledCorrectly(t *testing.T) {
+	//Get error
+	//Check w.cur.err
+	//Check stack
+}
+
+func TestStackIsPopulatedCorrectly(t *testing.T) {
+	//Check things are added to the stack correcty
+}