use a function

Author: SimenB

packages/babel-plugin-jest-hoist/src/__tests__/__snapshots__/hoistPlugin.test.ts.snap

@@ -15,7 +15,7 @@ _getJestObj().mock("./App", () => () =>
     void 0,
     false,
     {
-      fileName: "/root/project/src/file.js",
+      fileName: _hoistedMockFactoryVariable(),
       lineNumber: 1,
       columnNumber: 32
     },
@@ -34,6 +34,10 @@ function _getJestObj() {
   return jest;
 }
 
+function _hoistedMockFactoryVariable() {
+  return "/root/project/src/file.js";
+}
+
 
 `;
 

packages/babel-plugin-jest-hoist/src/index.ts

@@ -146,8 +146,19 @@ FUNCTIONS.mock = args => {
             const initNode = binding.path.node.init;
 
             if (initNode && binding.constant && scope.isPure(initNode, true)) {
-              // replace the reference with its constant value
-              id.replaceWith(initNode);
+              const identifier = scope.generateUidIdentifier(
+                'hoistedMockFactoryVariable',
+              );
+
+              binding.path.parentPath.insertAfter(
+                createHoistedVariable({
+                  HOISTED_NAME: identifier,
+                  HOISTED_VALUE: binding.path.node.init,
+                }),
+              );
+
+              // replace reference with a call to the new function
+              id.replaceWith(callExpression(identifier, []));
 
               isAllowedIdentifier = true;
             }
@@ -191,6 +202,12 @@ function GETTER_NAME() {
 }
 `;
 
+const createHoistedVariable = statement`
+function HOISTED_NAME() {
+  return HOISTED_VALUE;
+}
+`;
+
 const isJestObject = (expression: NodePath<Expression>): boolean => {
   // global
   if (