vendor tsgo

tools/tsgo/internal/fourslash/tests/signatureHelpNestedCallTrailingComma_test.go

@@ -0,0 +1,28 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/lsp/lsproto"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestSignatureHelpNestedCallTrailingComma(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Regression test for crash when requesting signature help on a call target
+	// where the nested call has a trailing comma.
+	// Both outer and inner calls must have trailing commas, and outer must be generic.
+	const content = `declare function outer<T>(range: T): T;
+declare function inner(a: any): any;
+
+outer(inner/*1*/(undefined,),);`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.GoToMarker(t, "1")
+	f.VerifySignatureHelpPresent(t, &lsproto.SignatureHelpContext{
+		IsRetrigger: false,
+		TriggerKind: lsproto.SignatureHelpTriggerKindInvoked,
+	})
+}