packer_test: added shell provisioner test with empty inline list

packer_test/provisioner_tests/shell/provisioner_test.go

@@ -80,3 +80,18 @@ func (ts *PackerShellProvisionerTestSuite) TestInvalidShebangAsOption() {
 		SetArgs("build", "templates/shebang_as_option_invalid.pkr.hcl").
 		Assert(check.MustFail())
 }
+
+func (ts *PackerShellProvisionerTestSuite) TestEmptyInlineCommands() {
+	dir := ts.MakePluginDir()
+	defer dir.Cleanup()
+
+	ts.PackerCommand().UsePluginDir(dir).
+		SetArgs("plugins", "install", "github.com/hashicorp/docker").
+		Assert(check.MustSucceed())
+
+	ts.PackerCommand().UsePluginDir(dir).
+		AddEnv("HOME", os.Getenv("HOME")).
+		AddEnv("PATH", os.Getenv("PATH")).
+		SetArgs("build", "templates/empty_inline_list.pkr.hcl").
+		Assert(check.MustFail())
+}

packer_test/provisioner_tests/shell/templates/empty_inline_list.pkr.hcl

@@ -0,0 +1,12 @@
+source "docker" "test" {
+	image = "debian:bookworm"
+	discard = true
+}
+
+build {
+	sources = ["docker.test"]
+
+	provisioner "shell" {
+		inline = []
+	}
+}