test: add unit-test for PR 1743 v2

pkg/transformer/kubernetes/k8sutils.go

@@ -857,12 +857,11 @@ func FormatEnvName(name string) string {
 	if strings.Contains(envName, "/") {
 		envName = envName[strings.LastIndex(envName, "/")+1:]
 	}
-	// take only last 63 chars
+	// take only last chars: The ones after 63th index
 	if len(envName) > 63 {
 		envName = envName[len(envName)-63:]
 	}
-	envName = strings.Replace(envName, ".", "-", -1)
-	return envName
+	return strings.Replace(envName, ".", "-", -1)
 }
 
 // FormatFileName format file name

pkg/transformer/kubernetes/k8sutils_test.go

@@ -657,3 +657,50 @@ func TestReadOnlyRootFS(t *testing.T) {
 		}
 	}
 }
+
+func TestFormatEnvName(t *testing.T) {
+	type args struct {
+		name string
+	}
+	tests := []struct {
+		name string
+		args args
+		want string
+	}{
+		{
+			name: "check dot conversion",
+			args: args{
+				name: "random.test",
+			},
+			want: "random-test",
+		},
+		{
+			name: "check that path is shortened",
+			args: args{
+				name: "random/test/v1",
+			},
+			want: "v1",
+		},
+		{
+			name: "check that ./ is removed",
+			args: args{
+				name: "./random",
+			},
+			want: "random",
+		},
+		{
+			name: "check that ./ is removed",
+			args: args{
+				name: "abcdefghijklnmopqrstuvxyzabcdefghijklmnopqrstuvwxyzabcdejghijkl$Hereisadditional",
+			},
+			want: "rstuvxyzabcdefghijklmnopqrstuvwxyzabcdejghijkl$Hereisadditional",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := FormatEnvName(tt.args.name); got != tt.want {
+				t.Errorf("FormatEnvName() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}