Created

filex/file.go

@@ -0,0 +1,40 @@
+package filex
+
+import (
+	"os"
+)
+
+// IsFile Check path is a file
+func IsFile(path string) bool {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	return !fi.IsDir()
+}
+
+// IsDir Check path is directory
+func IsDir(path string) bool {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return false
+	}
+	return fi.IsDir()
+}
+
+// Exists Check path is exists
+func Exists(path string) bool {
+	_, err := os.Stat(path)
+	if err == nil || os.IsExist(err) {
+		return true
+	}
+	return false
+}
+
+// Size Return file size
+func Size(path string) int64 {
+	if fi, err := os.Stat(path); err == nil {
+		return fi.Size()
+	}
+	return 0
+}

filex/file_test.go

@@ -0,0 +1,66 @@
+package filex
+
+import (
+	"os"
+	"testing"
+)
+
+func TestIsDir(t *testing.T) {
+	root, _ := os.Getwd()
+	testCases := []struct {
+		Path   string
+		Except bool
+	}{
+		{"/a/b", false},
+		{root, true},
+		{root + "/file.go", false},
+		{root + "/file", false},
+	}
+	for _, testCase := range testCases {
+		v := IsDir(testCase.Path)
+		if v != testCase.Except {
+			t.Errorf("`%s` except %v actual %v", testCase.Path, testCase.Except, v)
+		}
+	}
+}
+
+func TestIsFile(t *testing.T) {
+	root, _ := os.Getwd()
+	testCases := []struct {
+		Path   string
+		Except bool
+	}{
+		{"/a/b", false},
+		{root, false},
+		{root + "/file.go", true},
+		{root + "/file", false},
+	}
+	for _, testCase := range testCases {
+		v := IsFile(testCase.Path)
+		if v != testCase.Except {
+			t.Errorf("`%s` except %v actual %v", testCase.Path, testCase.Except, v)
+		}
+	}
+}
+
+func TestExists(t *testing.T) {
+	root, _ := os.Getwd()
+	testCases := []struct {
+		Path   string
+		Except bool
+	}{
+		{"/a/b", false},
+		{root, true},
+		{root + "/file.go", true},
+		{root + "/file", false},
+		{root + "/1.jpg", false},
+		{"https://golang.org/doc/gopher/fiveyears.jpg", false},
+		{"https://golang.org/doc/gopher/not-found.jpg", false},
+	}
+	for _, testCase := range testCases {
+		v := Exists(testCase.Path)
+		if v != testCase.Except {
+			t.Errorf("`%s` except %v actual %v", testCase.Path, testCase.Except, v)
+		}
+	}
+}