vendor tsgo

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

@@ -0,0 +1,54 @@
+package fourslash_test
+
+import (
+	"testing"
+
+	"github.com/microsoft/typescript-go/internal/fourslash"
+	"github.com/microsoft/typescript-go/internal/testutil"
+)
+
+// TestAutoImportCrossProjectNodeModules verifies that when multiple projects share
+// a node_modules directory, auto-imports for a project only show packages that are
+// either listed in that project's package.json dependencies OR directly imported
+// by that project's files.
+//
+// Scenario:
+//   - Two separate projects (project-a and project-b) share a root node_modules
+//   - pkg-listed is in both package.json dependencies
+//   - pkg-unlisted is NOT in any package.json, but project-a imports it directly
+//   - When requesting completions in project-b, pkg-unlisted should NOT appear
+//     because project-b doesn't list it and doesn't import it directly.
+func TestAutoImportCrossProjectNodeModules(t *testing.T) {
+	t.Parallel()
+	defer testutil.RecoverAndFail(t, "Panic on fourslash test")
+	const content = `// @Filename: /node_modules/pkg-listed/package.json
+{ "name": "pkg-listed", "version": "1.0.0" }
+// @Filename: /node_modules/pkg-listed/index.d.ts
+export declare const pkg_listed_value: number;
+// @Filename: /node_modules/pkg-unlisted/package.json
+{ "name": "pkg-unlisted", "version": "1.0.0" }
+// @Filename: /node_modules/pkg-unlisted/index.d.ts
+export declare const pkg_unlisted_value: string;
+// @Filename: /project-a/tsconfig.json
+{ "compilerOptions": { "module": "commonjs", "strict": true } }
+// @Filename: /project-a/package.json
+{ "name": "project-a", "dependencies": { "pkg-listed": "*" } }
+// @Filename: /project-a/index.ts
+import { pkg_unlisted_value } from "pkg-unlisted";
+console.log(pkg_unlisted_value);
+// @Filename: /project-b/tsconfig.json
+{ "compilerOptions": { "module": "commonjs", "strict": true } }
+// @Filename: /project-b/package.json
+{ "name": "project-b", "dependencies": { "pkg-listed": "*" } }
+// @Filename: /project-b/index.ts
+pkg_/**/`
+	f, done := fourslash.NewFourslash(t, nil /*capabilities*/, content)
+	defer done()
+
+	// Open project-a's file first - this establishes that project-a imports pkg-unlisted
+	f.GoToFile(t, "/project-a/index.ts")
+
+	// Now go to project-b and baseline auto-imports
+	f.GoToMarker(t, "")
+	f.BaselineAutoImportsCompletions(t, []string{""})
+}