vendor tsgo

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

@@ -0,0 +1,26 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestGoToSourceFindImplementationNonNodeModules(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// When a .d.ts file is not in node_modules and has no sibling .js,
+	// source definition falls back to the standard definition provider
+	// and navigates to the .d.ts declaration.
+	const content = `// @moduleResolution: bundler
+// @declaration: true
+// @Filename: /home/src/workspaces/project/lib/helper.d.ts
+export declare function helper(): string;
+// @Filename: /home/src/workspaces/project/index.ts
+import { /*usage*/helper } from "./lib/helper";
+helper();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "usage")
+}