patch: update dev mode errors

.eslintrc.js

@@ -20,9 +20,10 @@ module.exports = {
     'prettier',
   ],
   globals: {
+    __DEV__: true,
     __LIB_VERSION__: true,
-    LIBRARY_NAME: true,
     ENV_DEVELOPMENT: true,
+    LIBRARY_NAME: true,
   },
   ignorePatterns: ['playground'],
   overrides: [

packages/n4s/src/lib/transformResult.js

@@ -9,7 +9,9 @@ export function validateResult(result, rule) {
   }
 
   throwError(
-    `${rule.name} wrong return value for the rule please check that the return is valid`
+    __DEV__
+      ? `${rule.name} wrong return value for the rule please check that the return is valid`
+      : rule.name + 'wrong return value'
   );
 }
 

packages/vest/config/jest/jest.setup.js

@@ -3,6 +3,7 @@ const { packageJson, packageNames } = require('../../../../util');
 const { version } = packageJson(packageNames.VEST);
 global.LIBRARY_NAME = packageNames.VEST;
 global.__LIB_VERSION__ = version;
+global.__DEV__ = true;
 global.ENV_DEVELOPMENT = true;
 
 // Registers global instance

packages/vest/src/core/test/test.js

@@ -7,6 +7,7 @@ import isPromise from 'isPromise';
 import { setPending } from 'pending';
 import runAsyncTest from 'runAsyncTest';
 import bindTestMemo from 'test.memo';
+import throwError from 'throwError';
 
 /**
  * Runs sync tests - or extracts promise.
@@ -50,11 +51,13 @@ const register = testObject => {
       runAsyncTest(testObject);
     }
   } catch {
-    /* FUTURE: throw an error here in dev mode:
-     * Your test function ${testObject.fieldName} returned
-     * a value other than `false` or a Promise. Return values
-     * are not supported and may cause unexpected behavior.
-     */
+    if (__DEV__) {
+      throwError(
+        `Your test function ${testObject.fieldName} returned ${JSON.stringify(
+          result
+        )}. Only "false" or a Promise are supported. Return values may cause unexpected behavior.`
+      );
+    }
   }
 };
 

packages/vest/src/hooks/group.js

@@ -4,7 +4,11 @@ import isStringValue from 'isStringValue';
 import throwError from 'throwError';
 
 const throwGroupError = value =>
-  throwError(`group initialization error. Expected "${value}" to be a string.`);
+  throwError(
+    __DEV__
+      ? `group initialization error. Expected "${value}" to be a string.`
+      : 'group name must be a string'
+  );
 
 /**
  * Runs a group callback.

packages/vest/src/hooks/warn.js

@@ -5,8 +5,9 @@ import throwError from 'throwError';
 /**
  * @type {String} Error message to display when `warn` gets called outside of a test.
  */
-const ERROR_OUTSIDE_OF_TEST =
-  "warn hook called outside of a test callback. It won't have an effect.";
+const ERROR_OUTSIDE_OF_TEST = __DEV__
+  ? "warn hook called outside of a test callback. It won't have an effect."
+  : 'warn called outside of a test.';
 
 /**
  * Sets a running test to warn only mode.