diff --git a/cmd/cmd_test.go b/cmd/cmd_test.go
new file mode 100644
index 000000000..70a146b4f
--- /dev/null
+++ b/cmd/cmd_test.go
@@ -0,0 +1,31 @@
+// Copyright 2013-2014 gopm authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package cmd
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func Test_parseTarget(t *testing.T) {
+	Convey("Target is empty", t, func() {
+		So(parseTarget(""), ShouldEqual, ".")
+	})
+
+	Convey("Target is not empty", t, func() {
+		So(parseTarget("github.com/gpmgo/gopm"), ShouldEqual, "github.com/gpmgo/gopm")
+	})
+}
diff --git a/cmd/get.go b/cmd/get.go
index a6f616b86..252d4c3a0 100644
--- a/cmd/get.go
+++ b/cmd/get.go
@@ -106,8 +106,11 @@ func runGet(ctx *cli.Context) {
 	switch len(ctx.Args()) {
 	case 0:
 		getByGopmfile(ctx)
-	default:
+	case 1:
 		getByPath(ctx)
+	default:
+		log.Error("get", "too many arguments")
+		log.Help("Try 'gopm help get' to get more information")
 	}
 }
 
@@ -124,6 +127,7 @@ func getByGopmfile(ctx *cli.Context) {
 
 	nodes := make([]*doc.Node, 0, len(imports))
 	for _, p := range imports {
+		// TODO: DOING TEST CASES!!!
 		p = doc.GetProjectPath(p)
 		// Skip subpackage(s) of current project.
 		if isSubpackage(p, targetPath) {
diff --git a/doc/utils.go b/doc/utils.go
index 558ab2ac9..98243d8d3 100644
--- a/doc/utils.go
+++ b/doc/utils.go
@@ -29,21 +29,24 @@ import (
 const VENDOR = ".vendor"
 
 // GetDirsInfo returns os.FileInfo of all sub-directories in root path.
-func GetDirsInfo(rootPath string) []os.FileInfo {
+func GetDirsInfo(rootPath string) ([]os.FileInfo, error) {
+	if !com.IsDir(rootPath) {
+		log.Warn("Directory %s does not exist", rootPath)
+		return []os.FileInfo{}, nil
+	}
+
 	rootDir, err := os.Open(rootPath)
 	if err != nil {
-		log.Error("", "Fail to open directory")
-		log.Fatal("", err.Error())
+		return nil, err
 	}
 	defer rootDir.Close()
 
 	dirs, err := rootDir.Readdir(0)
 	if err != nil {
-		log.Error("", "Fail to read directory")
-		log.Fatal("", err.Error())
+		return nil, err
 	}
 
-	return dirs
+	return dirs, nil
 }
 
 // GetImports returns package denpendencies.
@@ -56,7 +59,11 @@ func GetImports(absPath, importPath string, example bool) []string {
 		}
 	}
 
-	fis := GetDirsInfo(absPath)
+	fis, err := GetDirsInfo(absPath)
+	if err != nil {
+		log.Error("", "Fail to get directory's information")
+		log.Fatal("", err.Error())
+	}
 	absPath += "/"
 
 	imports := make([]string, 0, len(pkg.Imports))
@@ -66,7 +73,7 @@ func GetImports(absPath, importPath string, example bool) []string {
 		}
 	}
 
-	// TODO: Load too much
+	// TODO: Load too much, need to make sure which is imported which are not.
 	dirs := make([]string, 0, len(imports))
 	for _, fi := range fis {
 		if fi.IsDir() && !strings.Contains(fi.Name(), VENDOR) {
@@ -80,12 +87,14 @@ func GetImports(absPath, importPath string, example bool) []string {
 	return imports
 }
 
+// isVcsPath returns true if the directory was created by VCS.
 func isVcsPath(dirPath string) bool {
 	return strings.Contains(dirPath, "/.git") ||
 		strings.Contains(dirPath, "/.hg") ||
 		strings.Contains(dirPath, "/.svn")
 }
 
+// GetAllImports returns all imports in given directory and all sub-directories.
 func GetAllImports(dirs []string, importPath string, example bool) (imports []string) {
 	for _, d := range dirs {
 		if !isVcsPath(d) &&
@@ -116,7 +125,11 @@ func CheckIsExistWithVCS(path string) bool {
 	}
 
 	// Check if only has VCS folder.
-	dirs := GetDirsInfo(path)
+	dirs, err := GetDirsInfo(path)
+	if err != nil {
+		log.Error("", "Fail to get directory's information")
+		log.Fatal("", err.Error())
+	}
 
 	if len(dirs) > 1 {
 		return true
diff --git a/doc/utils_test.go b/doc/utils_test.go
new file mode 100644
index 000000000..568cc6d0f
--- /dev/null
+++ b/doc/utils_test.go
@@ -0,0 +1,71 @@
+// Copyright 2013-2014 gopm authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package doc
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+var VcsTestPairs = map[string]bool{
+	"/.hg":     true,
+	"/.git":    true,
+	"/.svn":    true,
+	"/.vendor": false,
+}
+
+func Test_isVcsPath(t *testing.T) {
+	Convey("Test if the path is belonging to VCS", t, func() {
+		for name, expect := range VcsTestPairs {
+			So(isVcsPath(name), ShouldEqual, expect)
+		}
+	})
+}
+
+func TestGetDirsInfo(t *testing.T) {
+	Convey("Get directory's information that exist", t, func() {
+		dis, err := GetDirsInfo(".")
+		So(err, ShouldBeNil)
+		So(len(dis), ShouldEqual, 13)
+	})
+
+	Convey("Get directory's information does not exist", t, func() {
+		dis, err := GetDirsInfo("./404")
+		So(err, ShouldBeNil)
+		So(len(dis), ShouldEqual, 0)
+	})
+}
+
+var GoStdTestPairs = map[string]bool{
+	"net/http": true,
+	"fmt":      true,
+	"github.com/gpmgo/gopm":  false,
+	"github.com/Unknwon/com": false,
+}
+
+func TestIsGoRepoPath(t *testing.T) {
+	Convey("Test if the path is belonging to Go STD", t, func() {
+		for name, expect := range GoStdTestPairs {
+			So(IsGoRepoPath(name), ShouldEqual, expect)
+		}
+	})
+}
+
+func TestGetImports(t *testing.T) {
+	Convey("Get package that are imported", t, func() {
+		So(len(GetImports(".", "github.com/gpmgo/gopm/docs", false)), ShouldEqual, 4)
+	})
+}
diff --git a/doc/vcs.go b/doc/vcs.go
index c3afc090c..224ae7507 100644
--- a/doc/vcs.go
+++ b/doc/vcs.go
@@ -1,4 +1,4 @@
-// Copyright 2013 gopm authors.
+// Copyright 2013-2014 gopm authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License"): you may
 // not use this file except in compliance with the License. You may obtain
@@ -245,7 +245,11 @@ metaScan:
 }
 
 func getImports(rootPath string, match map[string]string, cmdFlags map[string]bool, nod *Node) (imports []string) {
-	dirs := GetDirsInfo(rootPath)
+	dirs, err := GetDirsInfo(rootPath)
+	if err != nil {
+		log.Error("", "Fail to get directory's information")
+		log.Fatal("", err.Error())
+	}
 
 	for _, d := range dirs {
 		if d.IsDir() && !(!cmdFlags["-e"] && strings.Contains(d.Name(), "example")) {
diff --git a/gopm.go b/gopm.go
index 80700358e..3d3d98cdf 100644
--- a/gopm.go
+++ b/gopm.go
@@ -29,7 +29,7 @@ import (
 // Test that go1.1 tag above is included in builds. main.go refers to this definition.
 const go11tag = true
 
-const APP_VER = "0.6.3.0313"
+const APP_VER = "0.6.3.0315"
 
 // 	//cmd.CmdSearch,
 // 		cmdClean,