fix(pkg/downloader): add failing test for build with repo alias

Signed-off-by: Hang Park <hangpark@kaist.ac.kr>

pkg/downloader/manager_test.go

@@ -181,7 +181,8 @@ func TestGetRepoNames(t *testing.T) {
 	}
 }
 
-// This function is the skeleton test code of failing tests for #6416 and bugs due to #5874.
+// This function is the skeleton test code of failing tests for #6416 and #6871 and bugs due to #5874.
+//
 // This function is used by below tests that ensures success of build operation
 // with optional fields, alias, condition, tags, and even with ranged version.
 // Parent chart includes local-subchart 0.1.0 subchart from a fake repository, by default.
@@ -283,3 +284,11 @@ func TestBuild_WithTags(t *testing.T) {
 		Tags: []string{"tag1", "tag2"},
 	})
 }
+
+// Failing test for #6871
+func TestBuild_WithRepositoryAlias(t *testing.T) {
+	// Dependency repository is aliased in Chart.yaml
+	checkBuildWithOptionalFields(t, "with-repository-alias", chart.Dependency{
+		Repository: "@test",
+	})
+}