Add options to input-name rule. Addresses #276 (#286)

* Add caseSensitiveInputType, checkMutations, checkQueries options to input-name rule

caseSensitiveInputType: When false the input type name must be <mutationName>Input but is not case sensitive.

checkMutations (default true): Apply this rule to mutations.

checkQueries (default false): Apply this rule to queries.

Also fixed documentation error which says that checkInputType defaults to true, when infact it defaults to false.

* added changeset

Co-authored-by: Dotan Simha <dotansimha@gmail.com>

.changeset/early-turkeys-admire.md

@@ -0,0 +1,5 @@
+---
+'@graphql-eslint/eslint-plugin': minor
+---
+
+Add options to input-name rule.

packages/plugin/src/rules/input-name.ts

@@ -1,12 +1,13 @@
 import { GraphQLESLintRule } from '../types';
 
-type InputNameRuleConfig = [
-  {
-    checkInputType?: boolean;
-  }
-];
+type InputNameRuleConfig = {
+  checkInputType?: boolean;
+  caseSensitiveInputType?: boolean;
+  checkQueries?: boolean;
+  checkMutations?: boolean;
+};
 
-const rule: GraphQLESLintRule<InputNameRuleConfig> = {
+const rule: GraphQLESLintRule<InputNameRuleConfig[]> = {
   meta: {
     type: 'suggestion',
     docs: {
@@ -52,31 +53,65 @@ const rule: GraphQLESLintRule<InputNameRuleConfig> = {
         properties: {
           checkInputType: {
             type: 'boolean',
-            default: 'true',
+            default: false,
+            description: 'Check that the input type name follows the convention <mutationName>Input',
+          },
+          caseSensitiveInputType: {
+            type: 'boolean',
+            default: true,
+            description: 'Allow for case discrepancies in the input type name',
+          },
+          checkQueries: {
+            type: 'boolean',
+            default: false,
+            description: 'Apply the rule to Queries',
+          },
+          checkMutations: {
+            type: 'boolean',
+            default: true,
+            description: 'Apply the rule to Mutations',
           },
         },
         additionalProperties: false,
       },
     ],
   },
   create(context) {
+    const options: InputNameRuleConfig = {
+      caseSensitiveInputType: true,
+      checkInputType: false,
+      checkMutations: true,
+      checkQueries: false,
+      ...context?.options?.[0],
+    };
+
     const isMutationType = node => {
       return (
         (node.type === 'ObjectTypeDefinition' || node.type === 'ObjectTypeExtension') && node.name.value === 'Mutation'
       );
     };
 
+    const isQueryType = node => {
+      return (
+        (node.type === 'ObjectTypeDefinition' || node.type === 'ObjectTypeExtension') && node.name.value === 'Query'
+      );
+    };
+
+    const shouldCheckType = node =>
+      (options.checkMutations && isMutationType(node)) || (options.checkQueries && isQueryType(node));
+
     const listeners = {
       'FieldDefinition > InputValueDefinition': node => {
-        if (node.name.value !== 'input' && isMutationType(node.parent.parent)) {
+        if (node.name.value !== 'input' && shouldCheckType(node.parent.parent)) {
           context.report({
             node: node.name,
             message: `Input "${node.name.value}" should be called "input"`,
           });
         }
       },
     };
-    if (context.options && context.options[0] && context.options[0].checkInputType) {
+
+    if (options?.checkInputType) {
       listeners['FieldDefinition > InputValueDefinition NamedType'] = node => {
         const findInputType = item => {
           let currentNode = item;
@@ -87,11 +122,17 @@ const rule: GraphQLESLintRule<InputNameRuleConfig> = {
         };
 
         const inputValueNode = findInputType(node);
-        if (isMutationType(inputValueNode.parent.parent)) {
+        if (shouldCheckType(inputValueNode.parent.parent)) {
           const mutationName = `${inputValueNode.parent.name.value}Input`;
 
-          if (node.name.value !== mutationName) {
-            context.report({ node, message: `InputType "${node.name.value}" name should be "${mutationName}"` });
+          if (options.caseSensitiveInputType) {
+            if (node.name.value !== mutationName) {
+              context.report({ node, message: `InputType "${node.name.value}" name should be "${mutationName}"` });
+            }
+          } else {
+            if (node.name.value.toLowerCase() !== mutationName.toLowerCase()) {
+              context.report({ node, message: `InputType "${node.name.value}" name should be "${mutationName}"` });
+            }
           }
         }
       };

packages/plugin/tests/input-name.spec.ts

@@ -5,6 +5,10 @@ const ruleTester = new GraphQLRuleTester();
 
 ruleTester.runGraphQLTests('input-name', rule, {
   valid: [
+    {
+      code: 'type Mutation { SetMessage(input: SetMessageInput): String }',
+      options: [{ checkInputType: true }],
+    },
     {
       code: 'type Mutation { SetMessage(input: SetMessageInput): String }',
       options: [{ checkInputType: true }],
@@ -25,6 +29,31 @@ ruleTester.runGraphQLTests('input-name', rule, {
     'type Mutation { CreateMessage(input: String): String }',
     'extend type Mutation { CreateMessage(input: String): String }',
     'type Query { message(id: ID): Message }',
+    'extend type Query { message(id: ID): Message }',
+    {
+      code: 'type Mutation { userCreate(input: UserCreateInput): String }',
+      options: [{ checkInputType: true, caseSensitiveInputType: false }],
+    },
+    {
+      code: 'type Mutation { userCreate(input: userCreateInput): String }',
+      options: [{ checkInputType: true, caseSensitiveInputType: true }],
+    },
+    {
+      code: 'type Mutation { SetMessage(input: NonConforming): String }',
+      options: [{ checkMutations: false, checkInputType: true }],
+    },
+    {
+      code: 'type Mutation { SetMessage(input: String): String }',
+      options: [{ checkMutations: true, checkInputType: false }],
+    },
+    {
+      code: 'type Query { getMessage(input: NonConforming): String }',
+      options: [{ checkQueries: false, checkInputType: true }],
+    },
+    {
+      code: 'type Query { getMessage(input: String): String }',
+      options: [{ checkQueries: true, checkInputType: false }],
+    },
   ],
   invalid: [
     {
@@ -75,5 +104,20 @@ ruleTester.runGraphQLTests('input-name', rule, {
       options: [{ checkInputType: false }],
       errors: 2,
     },
+    {
+      code: 'type Mutation { userCreate(input: String): String }',
+      options: [{ checkInputType: true, caseSensitiveInputType: false }],
+      errors: 1,
+    },
+    {
+      code: 'type Mutation { userCreate(input: UserCreateInput): String }',
+      options: [{ checkInputType: true, caseSensitiveInputType: true }],
+      errors: 1,
+    },
+    {
+      code: 'type Query { getUser(input: GetUserInput): String }',
+      options: [{ checkQueries: true, checkInputType: true, caseSensitiveInputType: true }],
+      errors: 1,
+    },
   ],
 });