fix(prefer-immutable-types): inheriting of config options

Author: RebeccaStevens

src/rules/prefer-immutable-types.ts

@@ -349,19 +349,21 @@ function getParameterTypeViolations(
   const { parameters: rawOption, fixer: rawFixerConfig } = optionsObject;
   const {
     enforcement: rawEnforcement,
-    ignoreInferredTypes: rawIgnoreInferredTypes,
+    ignoreInferredTypes,
     ignoreClasses,
     ignoreNamePattern,
     ignoreTypePattern,
-  } = typeof rawOption === "object"
-    ? rawOption
-    : {
-        enforcement: rawOption,
-        ignoreInferredTypes: optionsObject.ignoreInferredTypes,
-        ignoreClasses: optionsObject.ignoreClasses,
-        ignoreNamePattern: optionsObject.ignoreNamePattern,
-        ignoreTypePattern: optionsObject.ignoreTypePattern,
-      };
+  } = {
+    ignoreInferredTypes: optionsObject.ignoreInferredTypes,
+    ignoreClasses: optionsObject.ignoreClasses,
+    ignoreNamePattern: optionsObject.ignoreNamePattern,
+    ignoreTypePattern: optionsObject.ignoreTypePattern,
+    ...(typeof rawOption === "object"
+      ? rawOption
+      : {
+          enforcement: rawOption,
+        }),
+  };
 
   const enforcement = parseEnforcement(
     rawEnforcement ?? optionsObject.enforcement
@@ -375,9 +377,6 @@ function getParameterTypeViolations(
 
   const fixerConfigs = parseFixerConfigs(rawFixerConfig, enforcement);
 
-  const ignoreInferredTypes =
-    rawIgnoreInferredTypes ?? optionsObject.ignoreInferredTypes;
-
   return node.params
     .map((param): Descriptor | undefined => {
       if (shouldIgnorePattern(param, context, ignoreNamePattern)) {
@@ -463,27 +462,22 @@ function getReturnTypeViolations(
   const { returnTypes: rawOption, fixer: rawFixerConfig } = optionsObject;
   const {
     enforcement: rawEnforcement,
-    ignoreInferredTypes: rawIgnoreInferredTypes,
+    ignoreInferredTypes,
     ignoreClasses,
     ignoreNamePattern,
     ignoreTypePattern,
-  } = typeof rawOption === "object"
-    ? rawOption
-    : {
-        enforcement: rawOption,
-        ignoreInferredTypes: optionsObject.ignoreInferredTypes,
-        ignoreClasses: optionsObject.ignoreClasses,
-        ignoreNamePattern: optionsObject.ignoreNamePattern,
-        ignoreTypePattern: optionsObject.ignoreTypePattern,
-      };
+  } = {
+    ignoreInferredTypes: optionsObject.ignoreInferredTypes,
+    ignoreClasses: optionsObject.ignoreClasses,
+    ignoreNamePattern: optionsObject.ignoreNamePattern,
+    ignoreTypePattern: optionsObject.ignoreTypePattern,
+    ...(typeof rawOption === "object" ? rawOption : { enforcement: rawOption }),
+  };
 
   const enforcement = parseEnforcement(
     rawEnforcement ?? optionsObject.enforcement
   );
 
-  const ignoreInferredTypes =
-    rawIgnoreInferredTypes ?? optionsObject.ignoreInferredTypes;
-
   if (
     enforcement === false ||
     (ignoreInferredTypes && node.returnType?.typeAnnotation === undefined) ||
@@ -612,26 +606,23 @@ function checkVarible(
   const { variables: rawOption, fixer: rawFixerConfig } = optionsObject;
   const {
     enforcement: rawEnforcement,
-    ignoreInferredTypes: rawIgnoreInferredTypes,
+    ignoreInferredTypes,
     ignoreClasses,
     ignoreNamePattern,
     ignoreTypePattern,
-    ignoreInFunctions: rawIgnoreInFunctions,
-  } = typeof rawOption === "object"
-    ? rawOption
-    : {
-        enforcement: rawOption,
-        ignoreInferredTypes: optionsObject.ignoreInferredTypes,
-        ignoreClasses: optionsObject.ignoreClasses,
-        ignoreNamePattern: optionsObject.ignoreNamePattern,
-        ignoreTypePattern: optionsObject.ignoreTypePattern,
-        ignoreInFunctions: false,
-      };
+    ignoreInFunctions,
+  } = {
+    ignoreInferredTypes: optionsObject.ignoreInferredTypes,
+    ignoreClasses: optionsObject.ignoreClasses,
+    ignoreNamePattern: optionsObject.ignoreNamePattern,
+    ignoreTypePattern: optionsObject.ignoreTypePattern,
+    ignoreInFunctions: false,
+    ...(typeof rawOption === "object" ? rawOption : { enforcement: rawOption }),
+  };
 
   const enforcement = parseEnforcement(
     rawEnforcement ?? optionsObject.enforcement
   );
-  const ignoreInFunctions = rawIgnoreInFunctions ?? false;
 
   if (
     enforcement === false ||
@@ -663,8 +654,6 @@ function checkVarible(
     };
   }
 
-  const ignoreInferredTypes =
-    rawIgnoreInferredTypes ?? optionsObject.ignoreInferredTypes;
   const nodeWithTypeAnnotation = propertyDefinition ? node : node.id;
 
   if (

tests/rules/prefer-immutable-types/ts/parameters/valid.ts

@@ -230,6 +230,22 @@ const tests: ReadonlyArray<ValidTestCase> = [
     `,
     optionsSet: [[{ ignoreNamePattern: "^mutable" }]],
   },
+  // Inherit Ignore Name Prefix.
+  {
+    code: dedent`
+      function foo(mutableArg: string[]) {}
+    `,
+    optionsSet: [
+      [
+        {
+          ignoreNamePattern: "^mutable",
+          parameters: {
+            enforcement: "Immutable",
+          },
+        },
+      ],
+    ],
+  },
   // Ignore Name Suffix.
   {
     code: dedent`