Add test

Author: mischnic

turbopack/crates/turbopack-tests/tests/execution.rs

@@ -392,6 +392,17 @@ async fn run_test_operation(prepared_test: ResolvedVc<PreparedTest>) -> Result<V
             .resolved_cell(),
     );
 
+    let mut fallback_import_map = ImportMap::empty();
+    fallback_import_map.insert_exact_alias(
+        rcstr!("fallback"),
+        ImportMapping::External(
+            None,
+            ExternalType::EcmaScriptModule,
+            ExternalTraced::Untraced,
+        )
+        .resolved_cell(),
+    );
+
     let remove_unused_exports = options.remove_unused_exports.unwrap_or(true);
 
     let asset_context: Vc<Box<dyn AssetContext>> = Vc::upcast(ModuleAssetContext::new(
@@ -435,6 +446,7 @@ async fn run_test_operation(prepared_test: ResolvedVc<PreparedTest>) -> Result<V
             browser: true,
             module: true,
             import_map: Some(import_map.resolved_cell()),
+            fallback_import_map: Some(fallback_import_map.resolved_cell()),
             ..Default::default()
         }
         .cell(),

turbopack/crates/turbopack-tests/tests/execution/turbopack/resolving/dynamic/input/index.js

@@ -0,0 +1,19 @@
+let names = ['cannot-resolve']
+if (globalThis.foo != undefined) {
+  // ensure `<dynamic>` is part of the array
+  names.push(globalThis.foo)
+}
+
+let result
+for (let name of names) {
+  try {
+    result = require(name).Iconv
+    return
+  } catch {}
+}
+
+console.log(result)
+
+it('should correctly handle potentially completely dynamic requests', () => {
+  expect(result).toBeUndefined()
+})

turbopack/crates/turbopack-tests/tests/execution/turbopack/resolving/dynamic/issues/__l___Module not found____c__ Can't resolve __c_('-3a5df6.txt

@@ -0,0 +1,21 @@
+warning - [resolve] /turbopack/crates/turbopack-tests/tests/execution/turbopack/resolving/dynamic-module/input/index.js:10:13  Module not found: Can't resolve ('cannot-resolve' | <dynamic>)
+  
+       6 | 
+       7 | let result
+       8 | for (let name of names) {
+       9 |   try {
+         +              v-----------v
+      10 +     result = require(name).Iconv
+         +              ^-----------^
+      11 |     return
+      12 |   } catch {}
+      13 | }
+      14 | 
+  
+  
+  
+  | It was not possible to find the requested file.
+  | Parsed request as written in source code: module "'cannot-resolve'" or dynamic
+  | Path where resolving has started: [project]/turbopack/crates/turbopack-tests/tests/execution/turbopack/resolving/dynamic-module/input/index.js
+  | Type of request: commonjs request
+  |