From c0161bd3cc7e592f6128510f82ce636790fd7834 Mon Sep 17 00:00:00 2001
From: forgoty <forgoty13@gmail.com>
Date: Fri, 5 Dec 2025 19:28:52 +0100
Subject: [PATCH] issue(external module): add external module test case

---
 cleanarch/cleanarch_test.go                              | 1 +
 examples/external-module/README.md                       | 3 +++
 examples/external-module/moduleA/go.mod                  | 5 +++++
 .../moduleA/internal/application/service.go              | 9 +++++++++
 examples/external-module/moduleB/application/errors.go   | 5 +++++
 examples/external-module/moduleB/go.mod                  | 3 +++
 6 files changed, 26 insertions(+)
 create mode 100644 examples/external-module/README.md
 create mode 100644 examples/external-module/moduleA/go.mod
 create mode 100644 examples/external-module/moduleA/internal/application/service.go
 create mode 100644 examples/external-module/moduleB/application/errors.go
 create mode 100644 examples/external-module/moduleB/go.mod

diff --git a/cleanarch/cleanarch_test.go b/cleanarch/cleanarch_test.go
index 37171bd..673fe62 100644
--- a/cleanarch/cleanarch_test.go
+++ b/cleanarch/cleanarch_test.go
@@ -60,6 +60,7 @@ func TestValidator_Validate(t *testing.T) {
 			IsValid:         true,
 			IgnoredPackages: []string{"github.com/roblaszczak/go-cleanarch/examples/ignore-package/app"},
 		},
+		{Path: "../examples/external-module/moduleA", IsValid: true},
 	}
 
 	for _, c := range testCases {
diff --git a/examples/external-module/README.md b/examples/external-module/README.md
new file mode 100644
index 0000000..757c6dc
--- /dev/null
+++ b/examples/external-module/README.md
@@ -0,0 +1,3 @@
+# External module imports
+
+moduleA imports from external Go module moduleB with same layer name.
diff --git a/examples/external-module/moduleA/go.mod b/examples/external-module/moduleA/go.mod
new file mode 100644
index 0000000..dc72de2
--- /dev/null
+++ b/examples/external-module/moduleA/go.mod
@@ -0,0 +1,5 @@
+module github.com/external/moduleA
+
+go 1.21
+
+replace github.com/external/moduleB => ../moduleB
diff --git a/examples/external-module/moduleA/internal/application/service.go b/examples/external-module/moduleA/internal/application/service.go
new file mode 100644
index 0000000..836545c
--- /dev/null
+++ b/examples/external-module/moduleA/internal/application/service.go
@@ -0,0 +1,9 @@
+package application
+
+import (
+	"github.com/external/moduleB/application"
+)
+
+func Handle() error {
+	return application.ErrNotFound
+}
diff --git a/examples/external-module/moduleB/application/errors.go b/examples/external-module/moduleB/application/errors.go
new file mode 100644
index 0000000..32eeb19
--- /dev/null
+++ b/examples/external-module/moduleB/application/errors.go
@@ -0,0 +1,5 @@
+package application
+
+import "errors"
+
+var ErrNotFound = errors.New("not found")
diff --git a/examples/external-module/moduleB/go.mod b/examples/external-module/moduleB/go.mod
new file mode 100644
index 0000000..48711a2
--- /dev/null
+++ b/examples/external-module/moduleB/go.mod
@@ -0,0 +1,3 @@
+module github.com/external/moduleB
+
+go 1.21