From 6b365ea3e6735932e9759f9c0a628529804c0cbc Mon Sep 17 00:00:00 2001
From: CrazyMax <1951866+crazy-max@users.noreply.github.com>
Date: Thu, 28 Nov 2024 10:29:52 +0100
Subject: [PATCH] bake: test empty attribute

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>
---
 bake/bake_test.go | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/bake/bake_test.go b/bake/bake_test.go
index b61e2ecff3e..98715a5cd19 100644
--- a/bake/bake_test.go
+++ b/bake/bake_test.go
@@ -2019,6 +2019,26 @@ target "app" {
 	})
 }
 
+// https://github.com/docker/buildx/pull/428
+// https://github.com/docker/buildx/issues/2822
+func TestEmptyAttribute(t *testing.T) {
+	fp := File{
+		Name: "docker-bake.hcl",
+		Data: []byte(`
+target "app" {
+  output = [""]
+}
+`),
+	}
+
+	ctx := context.TODO()
+
+	m, _, err := ReadTargets(ctx, []File{fp}, []string{"app"}, nil, nil)
+	require.Equal(t, 1, len(m))
+	require.Len(t, m["app"].Outputs, 0)
+	require.NoError(t, err)
+}
+
 func stringify[V fmt.Stringer](values []V) []string {
 	s := make([]string, len(values))
 	for i, v := range values {