test(deploy): verify unified TEST and gray environment contracts

firstleg/src/test/java/com/baiyue/firstleg/client/EventBridgeClientDeploymentContractTest.java

@@ -1,10 +1,12 @@
 package com.baiyue.firstleg.client;
 
 import org.junit.jupiter.api.Test;
+import org.springframework.util.PropertyPlaceholderHelper;
 
 import java.nio.file.Files;
 import java.nio.file.Path;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
@@ -23,11 +25,18 @@ class EventBridgeClientDeploymentContractTest {
     }
 
     @Test
-    void testComposeUsesDirectBusinessServiceDns() throws Exception {
+    void composeUsesDirectBusinessServiceDnsForTestAndGray() throws Exception {
         String compose = Files.readString(REPOSITORY_ROOT.resolve("deploy/docker-compose.yml"));
 
         assertTrue(compose.contains("LASTLEG_SERVICE_URL: http://lastleg-service:9303"));
-        assertTrue(compose.contains("firstleg-test-network"));
+        String networkName = compose.lines().map(String::strip)
+            .filter(line -> line.startsWith("name: firstleg-") && line.endsWith("-network"))
+            .findFirst().orElseThrow().substring("name: ".length());
+        assertEquals("firstleg-${DEPLOY_ENV:-test}-network", networkName);
+        var placeholders = new PropertyPlaceholderHelper("${", "}", ":-", false);
+        assertEquals("firstleg-test-network", placeholders.replacePlaceholders(networkName, key -> null));
+        assertEquals("firstleg-production-network", placeholders.replacePlaceholders(networkName,
+            key -> "DEPLOY_ENV".equals(key) ? "production" : null));
         assertFalse(compose.contains("event-bridge"));
     }
 }