avoid_using_api works with getters + cleared test case

Author: iimironchuk

lib/src/lints/avoid_using_api/avoid_using_api_linter.dart

@@ -270,5 +270,23 @@ class AvoidUsingApiLinter {
 
       reporter.atNode(node.methodName, entryCode);
     });
+
+    context.registry.addPrefixedIdentifier((node) {
+      final propertyName = node.identifier.name;
+      if (propertyName != identifier) return;
+
+      final element = node.identifier.staticElement;
+      if (element == null || element.enclosingElement3 is! ExtensionElement) {
+        return;
+      }
+
+      final extensionElement = element.enclosingElement3! as ExtensionElement;
+      if (extensionElement.name != className) return;
+
+      final sourcePath = extensionElement.librarySource.uri.toString();
+      if (!_matchesSource(sourcePath, source)) return;
+
+      reporter.atNode(node.identifier, entryCode);
+    });
   }
 }

lint_test/avoid_using_api/external_source/lib/external_source.dart

@@ -25,4 +25,6 @@ int banned = 5;
 
 extension BannedExtension on int {
   int banned() => this + 10;
+
+  int get bannedGetter => 10;
 }

lint_test/avoid_using_api/identifier_extension_source_ban/analysis_options.yaml

@@ -11,4 +11,8 @@ custom_lint:
           identifier: banned
           source: package:external_source
           reason: "Banned identifier from BannedExtension from package:external_source is not allowed"
+        - class_name: BannedExtension
+          identifier: bannedGetter
+          source: package:external_source
+          reason: "bannedGetter identifier from BannedExtension from package:external_source is not allowed"
 

lint_test/avoid_using_api/identifier_extension_source_ban/lib/identifier_extension_source_ban_test.dart

@@ -5,4 +5,7 @@ void extensionIdentifierBanTesting(){
 
   // expect_lint: avoid_using_api
   a.banned();
+
+  // expect_lint: avoid_using_api
+  a.bannedGetter;
 }