vendor tsgo

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

@@ -0,0 +1,56 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestGoToSourceDefaultImportUsageSiteChecker(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// When the cursor is on a usage of a default import (not on the import
+	// clause itself), the checker path is taken. getCandidateSourceDeclarationNames
+	// must include "default" from the resolved declaration's export-default
+	// modifier, since isDefaultImportName returns false at the usage site.
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./index.js", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.d.ts
+export default class Widget {
+    render(): void;
+}
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default class /*targetWidget*/Widget {
+    /*targetRender*/render() {}
+}
+// @Filename: /home/src/workspaces/project/index.ts
+import Widget from "pkg";
+const w = new Widget/*constructUsage*/("test");
+w./*methodUsage*/render();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "constructUsage", "methodUsage")
+}
+
+func TestGoToSourceDefaultImportReExportUsage(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Default import re-exported and then used at a call site. The checker
+	// must resolve the alias chain, and the source definition should reach
+	// the original implementation file.
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/pkg/package.json
+{ "name": "pkg", "main": "./index.js", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.d.ts
+export default function greet(name: string): string;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default function /*targetGreet*/greet(name) { return "Hello, " + name; }
+// @Filename: /home/src/workspaces/project/index.ts
+import greet from "pkg";
+greet/*callUsage*/("world");`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "callUsage")
+}