writing test cases for FindFiles

core/findfiles_test.go

@@ -1,6 +1,14 @@
 package core
 
-import "testing"
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	cf "github.com/osamaadam/cfgrr/configfile"
+	"github.com/osamaadam/cfgrr/helpers"
+	"github.com/osamaadam/cfgrr/ignorefile"
+)
 
 func TestCheckGlobsMatch(t *testing.T) {
 	tests := []struct {
@@ -30,5 +38,99 @@ func TestCheckGlobsMatch(t *testing.T) {
 }
 
 func TestFindFiles(t *testing.T) {
-	t.Skip("TODO: I don't know how to test this function without creating a bunch of files and directories in the test directory. I don't want to do that.")
+	backupDir := t.TempDir()
+	_createFiles(
+		backupDir,
+		".vimrc",
+		".bashrc",
+		".zshrc",
+		".config/nvim/init.vim",
+		".config/nvim/coc-settings.json",
+	)
+
+	tests := []struct {
+		name          string
+		filesToIgnore []string
+		patterns      []string
+		expectedFiles []string
+		expectErr     bool
+	}{
+		{"no patterns", []string{}, []string{}, []string{}, true},
+		{"accept all, ignore none", []string{}, []string{"**/*"}, []string{
+			".vimrc",
+			".bashrc",
+			".zshrc",
+			".config/nvim/init.vim",
+			".config/nvim/coc-settings.json",
+		}, false},
+		{"ignore specific patterns", []string{"**/*rc"}, []string{"**/*"}, []string{
+			".config/nvim/init.vim",
+			".config/nvim/coc-settings.json",
+		}, false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			igContainer := _createIgnoreFile(t.TempDir(), tt.filesToIgnore...)
+
+			files, err := FindFiles(backupDir, igContainer, tt.patterns...)
+			if tt.expectErr && err != nil {
+				return
+			} else if tt.expectErr && err == nil {
+				t.Fatalf("expected error, got nil")
+			} else if !tt.expectErr && err != nil {
+				t.Fatalf("unexpected error: %v", err)
+			}
+
+			if len(files) != len(tt.expectedFiles) {
+				t.Fatalf("expected %d files, got %d", len(tt.expectedFiles), len(files))
+			}
+
+			for _, file := range files {
+				relativePath, err := filepath.Rel(backupDir, file.PathAbs())
+				if err != nil {
+					t.Fatalf("unexpected error: %v", err)
+				}
+				if !helpers.Contains(tt.expectedFiles, relativePath) {
+					t.Errorf("expected to find %s but didn't", relativePath)
+				}
+			}
+		})
+	}
+}
+
+func _createFiles(dir string, names ...string) []*cf.ConfigFile {
+	numOfFiles := len(names)
+	files := make([]*cf.ConfigFile, numOfFiles)
+
+	for i, name := range names {
+		filePath := filepath.Join(dir, name)
+		fileDir := filepath.Dir(filePath)
+		if err := os.MkdirAll(fileDir, 0755); err != nil {
+			panic(err)
+		}
+		f, err := os.Create(filePath)
+		if err != nil {
+			panic(err)
+		}
+		f.Close()
+		files[i], _ = cf.NewConfigFile(f.Name())
+	}
+
+	return files
+}
+
+func _createIgnoreFile(backupDir string, patterns ...string) ignorefile.IIgnoresContainer {
+	ignFile, err := ignorefile.InitDefaultIgnoreFile()
+	if err != nil {
+		panic(err)
+	}
+
+	if err := ignFile.WriteLines(patterns...); err != nil {
+		panic(err)
+	}
+
+	ignContainer := ignorefile.NewIgnoresContainer(filepath.Base(ignFile.Path()))
+
+	return ignContainer
 }