adding unit test for copy

cmd/init.go

@@ -10,6 +10,8 @@ import (
   "github.com/Marcusk19/bender/tools"
 )
 
+var fs = tools.AppFs
+
 func init() {
   RootCmd.AddCommand(initCommand)
 }
@@ -25,7 +27,7 @@ func copyExistingConfigs(programs []string, destRootOpt ...string) {
   for _, program := range(programs) {
     // TODO: do something here
     print(configRoot + program)
-    err := tools.CopyDir(filepath.Join(configRoot, program), filepath.Join(destRoot, program))
+    err := tools.CopyDir(fs, filepath.Join(configRoot, program), filepath.Join(destRoot, program))
     if err != nil {
       log.Fatal(err)
     }
@@ -37,7 +39,7 @@ func createDotfileStructure(programs []string) {
   dotfileRoot := os.Getenv("HOME") + "/.dotfiles/"
   for _, program := range(programs) {
     fmt.Printf("attempting to create directory %s%s\n", dotfileRoot, program)
-    if err := os.MkdirAll(dotfileRoot + program, os.ModePerm); err != nil {
+    if err := fs.MkdirAll(dotfileRoot + program, os.ModePerm); err != nil {
       log.Fatal(err)
     }
   }

go.mod

@@ -6,8 +6,10 @@ require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
 	github.com/spf13/cobra v1.8.0 // indirect
 	github.com/spf13/pflag v1.0.5 // indirect
 	github.com/stretchr/testify v1.9.0 // indirect
+	golang.org/x/text v0.14.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

go.sum

@@ -6,12 +6,16 @@ github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLf
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/afero v1.11.0 h1:WJQKhtpdm3v2IzqG8VMqrr6Rf3UYpEF239Jy9wNepM8=
+github.com/spf13/afero v1.11.0/go.mod h1:GH9Y3pIexgf1MTIWtNGyogA5MwRIDXGUr+hbWNoBjkY=
 github.com/spf13/cobra v1.8.0 h1:7aJaZx1B85qltLMc546zn58BxxfZdR/W22ej9CFoEf0=
 github.com/spf13/cobra v1.8.0/go.mod h1:WXLWApfZ71AjXPya3WOlMsY9yMs7YeiHhFVlvLyhcho=
 github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
 github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
 github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
 github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+golang.org/x/text v0.14.0 h1:ScX5w1eTa3QqT8oi6+ziP7dTV1S2+ALU0bI+0zXKWiQ=
+golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

test/copy_test.go

@@ -1,3 +1,86 @@
 package test
 
+import (
+	"os"
+	"testing"
+
+	"github.com/Marcusk19/bender/tools"
+	"github.com/spf13/afero"
+)
+
+func init() {
+  tools.SetTestFs()
+}
+
+
+func TestCopyFile(t *testing.T) {
+  fs := afero.NewMemMapFs()
+
+  fs.MkdirAll("test/src", 0755)
+  fs.MkdirAll("test/dest", 0755)
+  err := afero.WriteFile(fs, "test/src/a.txt", []byte("file a"), 0644)
+  if err != nil {
+    t.Errorf("problem creating source file: %s", err.Error())
+  }
+
+  err = tools.CopyFile(fs, "test/src/a.txt", "test/dest/a.txt")
+  if err != nil {
+    t.Error(err.Error())
+  }
+  _, err = fs.Stat("test/dest/a.txt")
+  if os.IsNotExist(err) {
+    t.Errorf("expected destination file does not exist")
+  }
+  
+  result, err := afero.ReadFile(fs, "test/dest/a.txt")
+  if err != nil {
+    t.Error(err.Error())
+  }
+
+  if string(result) != "file a" {
+    t.Errorf("expected 'file a' got '%s'", string(result))
+  }
+  
+}
+
+func TestCopyDir(t *testing.T) {
+  fs := afero.NewMemMapFs()
+
+  fs.MkdirAll("test/src/dirA", 0755)
+  fs.MkdirAll("test/dest/", 0755)
+  fs.Mkdir("test/src/dirA/dirB", 0755)
+
+  err := afero.WriteFile(fs, "test/src/dirA/a.txt", []byte("file a"), 0644)
+  if err != nil {
+    t.Error(err.Error())
+  }
+  err = afero.WriteFile(fs, "test/src/dirA/dirB/b.txt", []byte("file b"), 0644)
+  if err != nil {
+    t.Error(err.Error())
+  }
+
+  err = tools.CopyDir(fs, "test/src", "test/dest")
+  if err != nil {
+    t.Error(err.Error())
+  }
+
+  result, err := afero.ReadFile(fs, "test/dest/dirA/a.txt")
+  if err != nil {
+    t.Error(err.Error())
+  }
+
+  if string(result) != "file a" {
+    t.Errorf("expected 'file a' got '%s'", string(result))
+  }
+
+  result, err = afero.ReadFile(fs, "test/dest/dirA/dirB/b.txt")
+  if err != nil {
+    t.Error(err.Error())
+  }
+
+  if string(result) != "file b" {
+    t.Errorf("expected 'file b' got '%s'", string(result))
+  }
+
+}
 

tools/copy.go

@@ -3,14 +3,13 @@ package tools
 import (
 	"fmt"
 	"io"
-	"os"
-  "log"
 	"path/filepath"
+
+	"github.com/spf13/afero"
 )
 
-func CopyFile(srcFile, destFile string) error{
+func CopyFile(os afero.Fs, srcFile, destFile string) error{
   // helper function to copy files over
-  log.Printf("copy of %s to %s\n", srcFile, destFile)
   sourceFileStat, err := os.Stat(srcFile)
   if err != nil {
     return err
@@ -37,27 +36,27 @@ func CopyFile(srcFile, destFile string) error{
   return err
 }
 
-func CopyDir(srcDir, destDir string) error {
-  log.Printf("copying from %s to %s\n", srcDir, destDir)
-  entries, err := os.ReadDir(srcDir)
+func CopyDir(os afero.Fs, srcDir, destDir string) error {
+  entries, err := afero.ReadDir(os, srcDir)
   if err != nil {
     return err
   }
-  log.Printf("entries found: %s\n", entries)
 
   for _, entry := range(entries) {
-    if entry.Type().IsDir() {
-      err := os.MkdirAll(filepath.Join(destDir, entry.Name()), os.ModePerm)
+    if entry.IsDir() {
+      subDir := filepath.Join(srcDir, entry.Name())
+      destSubDir := filepath.Join(destDir, entry.Name())
+      err := os.MkdirAll(destSubDir, entry.Mode().Perm())
       if err != nil {
         return err
       }
-      CopyDir(filepath.Join(srcDir, entry.Name()), filepath.Join(destDir, entry.Name()))
+      CopyDir(os, subDir, destSubDir)
       continue
     }
     sourcePath := filepath.Join(srcDir, entry.Name())
     destPath := filepath.Join(destDir, entry.Name())
 
-    err := CopyFile(sourcePath, destPath)
+    err := CopyFile(os, sourcePath, destPath)
     if err != nil {
       return err
     }

tools/filesystem.go

@@ -0,0 +1,16 @@
+package tools
+
+import (
+	"log"
+
+	"github.com/spf13/afero"
+)
+
+var AppFs afero.Fs = afero.NewOsFs()
+
+
+func SetTestFs() {
+  log.Print("setting test fs")
+  testFs := afero.NewMemMapFs()
+  AppFs = testFs
+}