feat(import-target): Add resolution error reason

tests/eslint-rule-tester.js

@@ -8,12 +8,17 @@ const { RuleTester } = require("eslint")
 const { FlatRuleTester } = require("eslint/use-at-your-own-risk")
 const globals = require("globals")
 const semverSatisfies = require("semver/functions/satisfies")
+const os = require("os")
 
 // greater than or equal to ESLint v9
 exports.gteEslintV9 = semverSatisfies(eslintVersion, ">=9", {
     includePrerelease: true,
 })
 
+const platform = os.platform()
+exports.isCaseSensitiveFileSystem =
+    platform === "linux" || platform === "freebsd" || platform === "openbsd"
+
 exports.FlatRuleTester = exports.gteEslintV9 ? RuleTester : FlatRuleTester
 
 // to support the `env:{ es6: true, node: true}` rule-tester (env has been away in flat config.)
@@ -38,5 +43,19 @@ exports.RuleTester = function (config = defaultConfig) {
     )
 
     const ruleTester = new exports.FlatRuleTester(config)
+    const $run = ruleTester.run.bind(ruleTester)
+    ruleTester.run = function (name, rule, tests) {
+        tests.valid = tests.valid.filter(shouldRun)
+        tests.invalid = tests.invalid.filter(shouldRun)
+
+        $run(name, rule, tests)
+    }
     return ruleTester
 }
+
+// support skip in tests
+function shouldRun(item) {
+    const skip = typeof item === "string" ? false : item.skip
+    delete item.skip
+    return skip === void 0 || skip === false
+}

tests/lib/rules/no-missing-import.js

@@ -6,7 +6,7 @@
 
 const path = require("path")
 const { Linter } = require("eslint")
-const { RuleTester } = require("#eslint-rule-tester")
+const { RuleTester, isCaseSensitiveFileSystem } = require("#eslint-rule-tester")
 const rule = require("../../../lib/rules/no-missing-import")
 
 const DynamicImportSupported = (() => {
@@ -427,6 +427,7 @@ ruleTester.run("no-missing-import", rule, {
             filename: fixture("test.js"),
             code: "import a from './A.js';",
             errors: cantResolve("./A.js"),
+            skip: !isCaseSensitiveFileSystem,
         },
 
         {

tests/lib/rules/no-missing-require.js

@@ -5,7 +5,7 @@
 "use strict"
 
 const path = require("path")
-const RuleTester = require("#eslint-rule-tester").RuleTester
+const { RuleTester, isCaseSensitiveFileSystem } = require("#eslint-rule-tester")
 const rule = require("../../../lib/rules/no-missing-require")
 
 const tsReactExtensionMap = [
@@ -396,6 +396,7 @@ ruleTester.run("no-missing-require", rule, {
             filename: fixture("test.js"),
             code: "require('./A');",
             errors: cantResolve("./A"),
+            skip: !isCaseSensitiveFileSystem,
         },
 
         // require.resolve