- Fixed function_lines_of_code for top level fumctions

- Refactored tests for function_lines_of_code

lib/src/lints/function_lines_of_code/function_lines_of_code_metric.dart

@@ -51,6 +51,7 @@ class FunctionLinesOfCodeMetric
     void checkNode(AstNode node) => _checkNode(resolver, reporter, node);
 
     context.registry.addMethodDeclaration(checkNode);
+    context.registry.addFunctionDeclaration(checkNode);
     context.registry.addFunctionExpression(checkNode);
   }
 
@@ -59,8 +60,19 @@ class FunctionLinesOfCodeMetric
     ErrorReporter reporter,
     AstNode node,
   ) {
-    if (node is MethodDeclaration &&
-        config.parameters.excludeNames.contains(node.name.lexeme)) {
+    final name = () {
+      if (node is FunctionDeclaration) {
+        return node.name.lexeme;
+      } else if (node is MethodDeclaration) {
+        return node.name.lexeme;
+      } else if (node is FunctionExpression) {
+        return node.declaredElement?.name;
+      } else {
+        return null;
+      }
+    }();
+
+    if (name != null && config.parameters.excludeNames.contains(name)) {
       return;
     }
 

lint_test/function_lines_of_code_test/analysis_options.yaml

@@ -0,0 +1,11 @@
+analyzer:
+  plugins:
+    - ../custom_lint
+
+custom_lint:
+  rules:
+    - function_lines_of_code:
+      max_lines: 5
+      excludeNames:
+        - "longFunctionExcluded"
+        - "longMethodExcluded"

lint_test/function_lines_of_code_test/function_lines_of_code_test.dart

@@ -0,0 +1,41 @@
+class ClassWithLongMethods {
+  // expect_lint: function_lines_of_code
+  int longMethod() {
+    var i = 0;
+    i++;
+    i++;
+    i++;
+    i++;
+    return i;
+  }
+
+  // Excluded by excludeNames
+  int longMethodExcluded() {
+    var i = 0;
+    i++;
+    i++;
+    i++;
+    i++;
+    return i;
+  }
+}
+
+// expect_lint: function_lines_of_code
+int longFunction() {
+  var i = 0;
+  i++;
+  i++;
+  i++;
+  i++;
+  return i;
+}
+
+// Excluded by excludeNames
+int longFunctionExcluded() {
+  var i = 0;
+  i++;
+  i++;
+  i++;
+  i++;
+  return i;
+}