fix(no-focused-tests): detect usage like 'fit.each()'

Fixes #188

Author: Morikko

rules/__tests__/no-focused-tests.test.js

@@ -63,5 +63,9 @@ ruleTester.run('no-focused-tests', rule, {
       code: 'fit()',
       errors: [{ message: expectedErrorMessage, column: 1, line: 1 }],
     },
+    {
+      code: 'fit.each()',
+      errors: [{ message: expectedErrorMessage, column: 1, line: 1 }],
+    },
   ],
 });

rules/no-focused-tests.js

@@ -30,6 +30,17 @@ module.exports = {
       const callee = node.callee;
 
       if (callee.type === 'MemberExpression') {
+        if (
+          callee.object.type === 'Identifier' &&
+          isCallToFocusedTestFunction(callee.object)
+        ) {
+          context.report({
+            message: 'Unexpected focused test.',
+            node: callee.object,
+          });
+          return;
+        }
+
         if (
           callee.object.type === 'MemberExpression' &&
           isCallToTestOnlyFunction(callee.object)