Add the sse-websocket module

sse-websocket/src/test/java/com/ankurm/ssews/WebSocketContainerDefaultsTest.java

@@ -0,0 +1,30 @@
+package com.ankurm.ssews;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.test.web.servlet.client.RestTestClient;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Reads the container's own WebSocket buffer sizes rather than quoting a default from memory.
+ * Nothing in this application sets them.
+ */
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+        properties = "dashboard.broadcast.enabled=false")
+class WebSocketContainerDefaultsTest {
+
+    @LocalServerPort
+    int port;
+
+    @Test
+    void printThem() {
+        String body = RestTestClient.bindToServer().baseUrl("http://localhost:" + port).build()
+                .get().uri("/diag").exchange().expectStatus().isOk()
+                .expectBody(String.class).returnResult().getResponseBody();
+        System.out.println("=== /diag with no bigframes profile ===");
+        System.out.println(body);
+        assertThat(body).contains("\"ws.container.defaultMaxTextMessageBufferSize\":8192");
+    }
+}