feat: limit namespace import identifier in id-length rule (#18849)

* feat: limit namespace import identifier in id-length rule

* test: add tests for valid case in 'id-length' rule

* refactor: Sort order, Change variable name to semantic name

* Update lib/rules/id-length.js

Co-authored-by: Tanuj Kanti <[email protected]>

* Update tests/lib/rules/id-length.js

Co-authored-by: Tanuj Kanti <[email protected]>

* Update tests/lib/rules/id-length.js

Co-authored-by: Tanuj Kanti <[email protected]>

* test: add test for shows that ImportSpecifiers are allowed even with default 2 and with max option

---------

Co-authored-by: Tanuj Kanti <[email protected]>

Author: Chaedie

lib/rules/id-length.js

@@ -117,6 +117,7 @@ module.exports = {
                 return properties && !parent.computed && parent.key.name === node.name;
             },
             ImportDefaultSpecifier: true,
+            ImportNamespaceSpecifier: true,
             RestElement: true,
             FunctionExpression: true,
             ArrowFunctionExpression: true,

tests/lib/rules/id-length.js

@@ -64,6 +64,9 @@ ruleTester.run("id-length", rule, {
         { code: "({ a: obj.x.y.z } = {});", options: [{ properties: "never" }], languageOptions: { ecmaVersion: 6 } },
         { code: "import something from 'y';", languageOptions: { ecmaVersion: 6, sourceType: "module" } },
         { code: "export var num = 0;", languageOptions: { ecmaVersion: 6, sourceType: "module" } },
+        { code: "import * as something from 'y';", languageOptions: { ecmaVersion: 6, sourceType: "module" } },
+        { code: "import { x } from 'y';", languageOptions: { ecmaVersion: 6, sourceType: "module" } },
+        { code: "import { longName } from 'y';", options: [{ max: 5 }], languageOptions: { ecmaVersion: 6, sourceType: "module" } },
         { code: "({ prop: obj.x.y.something } = {});", languageOptions: { ecmaVersion: 6 } },
         { code: "({ prop: obj.longName } = {});", languageOptions: { ecmaVersion: 6 } },
         { code: "var obj = { a: 1, bc: 2 };", options: [{ properties: "never" }] },
@@ -246,6 +249,20 @@ ruleTester.run("id-length", rule, {
         { code: "var [i] = arr;", languageOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
         { code: "var [,i,a] = arr;", languageOptions: { ecmaVersion: 6 }, errors: [tooShortError, tooShortError] },
         { code: "function foo([a]) {}", languageOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
+        { code: "import x from 'module';", languageOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
+        { code: "import * as x from 'module';", languageOptions: { ecmaVersion: 6 }, errors: [tooShortError] },
+        {
+            code: "import longName from 'module';",
+            options: [{ max: 5 }],
+            languageOptions: { ecmaVersion: 6 },
+            errors: [tooLongError]
+        },
+        {
+            code: "import * as longName from 'module';",
+            options: [{ max: 5 }],
+            languageOptions: { ecmaVersion: 6 },
+            errors: [tooLongError]
+        },
         {
             code: "var _$xt_$ = Foo(42)",
             options: [{ min: 2, max: 4 }],