Add test cases

compiler-plugin-tests/src/test/java/io/ballerina/stdlib/websub/CompilerPluginTest.java

@@ -403,6 +403,17 @@ public void testCompilerPluginForListenerImplicitInitWithCheckExpr() {
         Assert.assertEquals(diagnostic.message(), expectedCode.getDescription());
     }
 
+    @Test
+    public void testCompilerPluginForListenerInitWithPortConfig() {
+        Package currentPackage = loadPackage("sample_25");
+        PackageCompilation compilation = currentPackage.getCompilation();
+        DiagnosticResult diagnosticResult = compilation.diagnosticResult();
+        List<Diagnostic> errorDiagnostics = diagnosticResult.diagnostics().stream()
+                .filter(d -> DiagnosticSeverity.ERROR.equals(d.diagnosticInfo().severity()))
+                .toList();
+        Assert.assertEquals(errorDiagnostics.size(), 0);
+    }
+
     private Package loadPackage(String path) {
         Path projectDirPath = RESOURCE_DIRECTORY.resolve(path);
         BuildProject project = BuildProject.load(getEnvironmentBuilder(), projectDirPath);

compiler-plugin-tests/src/test/resources/ballerina_sources/sample_25/Ballerina.toml

@@ -0,0 +1,7 @@
+[package]
+org = "websub_test"
+name = "sample_25"
+version = "0.1.0"
+
+[build-options]
+observabilityIncluded = true

compiler-plugin-tests/src/test/resources/ballerina_sources/sample_25/service.bal

@@ -0,0 +1,43 @@
+// Copyright (c) 2024, WSO2 LLC. (http://www.wso2.com).
+//
+// WSO2 LLC. licenses this file to you under the Apache License,
+// Version 2.0 (the "License"); you may not use this file except
+// in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing,
+// software distributed under the License is distributed on an
+// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+// KIND, either express or implied.  See the License for the
+// specific language governing permissions and limitations
+// under the License.
+
+import ballerina/websub;
+
+configurable int port = 9090;
+
+listener websub:Listener ln = check new(port, {
+    secureSocket: {
+        key: {
+            path: "tests/resources/ballerinaKeystore.pkcs12",
+            password: "ballerina"
+        }
+    }
+});
+
+@websub:SubscriberServiceConfig {
+}
+service /sample on new websub:Listener(port, {
+    secureSocket: {
+        key: {
+            path: "tests/resources/ballerinaKeystore.pkcs12",
+            password: "ballerina"
+        }
+    }
+}) {
+    remote function onEventNotification(websub:ContentDistributionMessage event) {
+        return;
+    }
+}