Allow passing the parent module in explicitly for setting the require…

… context

package.json

@@ -1,6 +1,6 @@
 {
   "name": "requirefire",
-  "version": "0.4.0",
+  "version": "0.4.1",
   "author": "Harry Brundage",
   "license": "MIT",
   "repository": {

spec/requirefire.spec.ts

@@ -110,4 +110,16 @@ describe("requirefire", () => {
     expect(mod.main.key).toEqual("main");
     expect(mod.sub.key).toEqual("sub");
   });
+
+  test("instances can be passed the parent module for resolving relative paths", () => {
+    _require = requirefire(module);
+
+    const one = _require("./fixtures/mod_a");
+    for (const key of Object.keys(_require.cache)) {
+      delete _require.cache[key];
+    }
+    const two = _require("./fixtures/mod_a");
+    expect(one).not.toBe(two);
+    expect(one.name).toEqual(two.name);
+  })
 });

src/index.ts

@@ -58,8 +58,14 @@ const loadModuleWithWrapper = (module: Module, prefix: string, suffix: string) =
 
 /**
  * Produce a new requirefire instance.
+ * 
+ * @param contextModule The module that will be used as the parent module for the requirefire instance. Relative paths will be resolved relative to this module.
  */
-const createRequirefire = () => {
+const createRequirefire = (contextModule?: Module) => {
+  if (!contextModule && module.parent) {
+    contextModule = module.parent;
+  }
+
   const cache: Record<string, Module> = {};
   const resolver = ResolverFactory.createResolver({
     useSyncFileSystemCalls: true,
@@ -130,8 +136,7 @@ const createRequirefire = () => {
   }
 
   function requirefire(path: string) {
-    const requirier = module.parent ? module.parent : undefined;
-    return requireModule(path, requirier);
+    return requireModule(path, contextModule);
   }
 
   requireModule.cache = cache;