vendor tsgo

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

@@ -0,0 +1,55 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+func TestGoToSourceMappedTypePropertyWithMatch(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// When accessing a property that only exists via a mapped type, the checker
+	// returns no declarations. The property access fallback (GetPropertyOfType)
+	// should find the property if it's in the .js implementation file.
+	// This test differs from the existing goToSourceMappedTypeProperty by having
+	// a named explicit property in the .d.ts alongside the mapped type.
+	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 obj: { a: number; b: number };
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export const obj = { /*targetA*/a: 1, /*targetB*/b: 2 };
+// @Filename: /home/src/workspaces/project/index.ts
+import { obj } from "pkg";
+obj./*propA*/a;
+obj./*propB*/b;`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "propA", "propB")
+}
+
+func TestGoToSourceNamespaceImportProperty(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	// import * as ns from "pkg"; ns.prop — should navigate to the property
+	// in the .js 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 declare function helper(): void;
+export declare const value: number;
+// @Filename: /home/src/workspaces/project/node_modules/pkg/index.js
+export function /*targetHelper*/helper() {}
+export const /*targetValue*/value = 42;
+// @Filename: /home/src/workspaces/project/index.ts
+import * as pkg from "pkg";
+pkg./*helperAccess*/helper();
+pkg./*valueAccess*/value;`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+	f.VerifyBaselineGoToSourceDefinition(t, "helperAccess", "valueAccess")
+}