1 files changed, 31 insertions, 0 deletions
diff --git a/gopls/internal/lsp/command/interface_test.go b/gopls/internal/lsp/command/interface_test.go
new file mode 100644
index 000000000..e602293a1
--- /dev/null
+++ b/gopls/internal/lsp/command/interface_test.go
@@ -0,0 +1,31 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package command_test
+
+import (
+	"io/ioutil"
+	"testing"
+
+	"github.com/google/go-cmp/cmp"
+	"golang.org/x/tools/gopls/internal/lsp/command/gen"
+	"golang.org/x/tools/internal/testenv"
+)
+
+func TestGenerated(t *testing.T) {
+	testenv.NeedsGoBuild(t) // This is a lie. We actually need the source code.
+
+	onDisk, err := ioutil.ReadFile("command_gen.go")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	generated, err := gen.Generate()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if diff := cmp.Diff(string(generated), string(onDisk)); diff != "" {
+		t.Errorf("command_gen.go is stale -- regenerate (-generated +on disk)\n%s", diff)
+	}
+}