vendor tsgo

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

@@ -0,0 +1,153 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestGoToSourceNamedAndDefaultExport(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// findDeclarationNodesByName correctly finds both named exports and
+	// default-exported classes/functions via the AST visitor.
+	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 {}
+export declare function helper(): void;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default class /*targetWidget*/Widget {}
+export function /*targetHelper*/helper() {}
+// @Filename: /home/src/workspaces/project/index.ts
+import /*importDefault*/Widget, { /*importHelper*/helper } from "pkg";
+Widget;
+helper();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importDefault", "importHelper")
+}
+
+func TestGoToSourceDefaultImportNotFirstStatement(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// Default import navigates to the actual export default declaration,
+	// not the first statement of the file, when the default export is not first.
+	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 declare const version: string;
+export default class Widget {}
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export const version = "1.0";
+export default class /*targetWidget*/Widget {}
+// @Filename: /home/src/workspaces/project/index.ts
+import /*importDefault*/Widget from "pkg";
+Widget;`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importDefault")
+}
+
+func TestGoToSourceUnnamedDefaultExport(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	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(): string;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default /*targetDefault*/function() { return "ok"; }
+// @Filename: /home/src/workspaces/project/index.ts
+import /*importDefault*/myFunc from "pkg";
+myFunc/*usage*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importDefault", "usage")
+}
+
+func TestGoToSourceEmptyNamesEntryFallback(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// getCandidateSourceDeclarationNames returns empty names,
+	// so mapDeclarationToSourceDefinitions falls through to entry declarations.
+	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
+declare const _default: { run(): void };
+export default _default;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default { run() {} };
+// @Filename: /home/src/workspaces/project/index.ts
+import /*defaultImport*/pkg from "pkg";
+pkg.run();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "defaultImport")
+}
+
+func TestGoToSourceExportAssignmentDefault(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// ExportAssignment/default path in findDeclarationNodesByName
+	// and getCandidateSourceDeclarationNames.
+	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
+declare const _default: { run(): void };
+export default _default;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+/*target*/export default { run() {} };
+// @Filename: /home/src/workspaces/project/index.ts
+import pkg from "pkg";
+pkg/*usage*/;`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "usage")
+}
+
+func TestGoToSourceExportAssignment(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// findDeclarationNodesByName finds export assignment (export = ...)
+	// when searching for "default".
+	const content = `// @moduleResolution: bundler
+// @Filename: /home/src/workspaces/project/node_modules/legacy/package.json
+{ "name": "legacy", "main": "./index.js", "types": "./index.d.ts" }
+// @Filename: /home/src/workspaces/project/node_modules/legacy/index.d.ts
+declare function legacyFn(): string;
+export = legacyFn;
+// @Filename: /home/src/workspaces/project/node_modules/legacy/index.js
+function /*targetFn*/legacyFn() { return "ok"; }
+module.exports = legacyFn;
+// @Filename: /home/src/workspaces/project/index.ts
+import /*importName*/legacyFn from "legacy";
+legacyFn();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "importName")
+}
+
+func TestGoToSourceExportAssignmentExpression(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	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 createThing(): { value: number };
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export default function createThing() { return { value: 42 }; }
+// @Filename: /home/src/workspaces/project/index.ts
+import /*defaultName*/createThing from "pkg";
+createThing/*callDefault*/();`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "defaultName", "callDefault")
+}