vendor tsgo

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

@@ -0,0 +1,35 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	. "github.com/microsoft/typescript-go/internal/fourslash/tests/util"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestCompletionsFromUntitledFile(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Test that completions work in untitled files without crashing.
+	// Regression test for https://github.com/microsoft/typescript-go/issues/2550
+	const content = `// @filename: /home/src/project/utils.ts
+export function helper() {}
+
+// @filename: ^/untitled/ts-nul-authority/Untitled-1.ts
+/**/`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+
+	// Request completions - this should not crash
+	f.VerifyCompletions(t, "", &fourslash.CompletionsExpectedList{
+		IsIncomplete: false,
+		ItemDefaults: &fourslash.CompletionsExpectedItemDefaults{
+			CommitCharacters: &DefaultCommitCharacters,
+		},
+		Items: &fourslash.CompletionsExpectedItems{
+			// We don't care about the exact completions, just that it doesn't crash
+			Includes: nil,
+		},
+	})
+}