adding utils unit tests

Signed-off-by: Michael Hoang <mhoang@redhat.com>

go/go.mod

@@ -9,6 +9,7 @@ require (
 	github.com/sabhiram/go-gitignore v0.0.0-20210923224102-525f6e181f06
 	github.com/spf13/cobra v1.7.0
 	github.com/spf13/pflag v1.0.5
+	github.com/stretchr/testify v1.8.1
 	golang.org/x/mod v0.10.0
 	gopkg.in/yaml.v3 v3.0.1
 )
@@ -19,6 +20,7 @@ require (
 	github.com/acomagu/bufpipe v1.0.4 // indirect
 	github.com/cloudflare/circl v1.3.2 // indirect
 	github.com/containerd/typeurl v1.0.2 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/emirpasic/gods v1.18.1 // indirect
 	github.com/go-git/gcfg v1.5.0 // indirect
 	github.com/go-git/go-billy/v5 v5.4.1 // indirect
@@ -30,10 +32,10 @@ require (
 	github.com/kevinburke/ssh_config v1.2.0 // indirect
 	github.com/kr/pretty v0.3.0 // indirect
 	github.com/pjbgf/sha1cd v0.2.3 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rogpeppe/go-internal v1.10.0 // indirect
 	github.com/sergi/go-diff v1.3.1 // indirect
 	github.com/skeema/knownhosts v1.1.0 // indirect
-	github.com/stretchr/testify v1.8.1 // indirect
 	github.com/xanzy/ssh-agent v0.3.3 // indirect
 	golang.org/x/crypto v0.8.0 // indirect
 	golang.org/x/net v0.9.0 // indirect

go/pkg/utils/cache_test.go

@@ -0,0 +1,48 @@
+package utils
+
+import (
+	"context"
+	"github.com/stretchr/testify/assert"
+	"testing"
+)
+
+func TestGetCachedFilePathsFromRoot(t *testing.T) {
+	missingPathErr := "no such file or directory"
+
+	tests := []struct {
+		name              string
+		root              string
+		ctx               context.Context
+		expectedFilePaths []string
+		expectedError     *string
+	}{
+		{
+			name: "Case 1: Cached file paths exist",
+			root: "path/to/root",
+			ctx: context.WithValue(context.Background(), key("mapFilePathsFromRoot"), map[string][]string{
+				"path/to/root": {"f1.txt", "f2.txt"},
+			}),
+			expectedFilePaths: []string{"f1.txt", "f2.txt"},
+			expectedError:     nil,
+		},
+		{
+			name:              "Case 2: Invalid file path",
+			root:              "invalid/path",
+			ctx:               context.Background(),
+			expectedFilePaths: []string{},
+			expectedError:     &missingPathErr,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			filePaths, err := GetCachedFilePathsFromRoot(tt.root, &tt.ctx)
+
+			if err != nil {
+				assert.Regexp(t, *tt.expectedError, err.Error(), "Error message should match")
+			}
+
+			assert.EqualValues(t, tt.expectedFilePaths, filePaths)
+		})
+	}
+}

go/pkg/utils/detector.go

@@ -494,7 +494,8 @@ func GetStringValueFromEnvFile(root string, regex string) string {
 	return ""
 }
 
-func getEnvFileContent(root string) (string, error) {
+// getEnvFileContent is exposed as a global variable for the purpose of running mock tests
+var getEnvFileContent = func(root string) (string, error) {
 	envPath := filepath.Join(root, ".env")
 	bytes, err := os.ReadFile(envPath)
 	if err != nil {