Add DTO coverage tests to restore JaCoCo line coverage

Agent-Logs-Url: https://github.com/github/copilot-sdk-java/sessions/51171251-bf84-43a9-9067-b0c62d32f0c7

Co-authored-by: edburns <75821+edburns@users.noreply.github.com>

Author: Copilot

src/test/java/com/github/copilot/sdk/DataObjectCoverageTest.java

@@ -11,6 +11,9 @@
 import com.fasterxml.jackson.databind.node.JsonNodeFactory;
 import com.fasterxml.jackson.databind.node.ObjectNode;
 import com.github.copilot.sdk.json.GetForegroundSessionResponse;
+import com.github.copilot.sdk.json.McpHttpServerConfig;
+import com.github.copilot.sdk.json.McpStdioServerConfig;
+import com.github.copilot.sdk.json.ModelCapabilitiesOverride;
 import com.github.copilot.sdk.json.PermissionRequest;
 import com.github.copilot.sdk.json.PermissionRequestResult;
 import com.github.copilot.sdk.json.PostToolUseHookInput;
@@ -178,4 +181,53 @@ void permissionRequestResultSetRules() {
         assertEquals(2, result.getRules().size());
         assertEquals("bash:read", result.getRules().get(0));
     }
+
+    @Test
+    void mcpHttpServerConfigGettersAndFluentSetters() {
+        var headers = new java.util.HashMap<String, String>();
+        headers.put("Authorization", "Bearer token");
+        var tools = java.util.List.of("tool-a");
+        var config = new McpHttpServerConfig().setUrl("https://mcp.example.com/sse").setHeaders(headers).setTools(tools)
+                .setTimeout(30);
+
+        assertEquals("http", config.getType());
+        assertEquals("https://mcp.example.com/sse", config.getUrl());
+        assertEquals("Bearer token", config.getHeaders().get("Authorization"));
+        assertEquals(tools, config.getTools());
+        assertEquals(30, config.getTimeout());
+    }
+
+    @Test
+    void mcpStdioServerConfigGettersAndFluentSetters() {
+        var args = java.util.List.of("-y", "@modelcontextprotocol/server-filesystem");
+        var env = new java.util.HashMap<String, String>();
+        env.put("NODE_ENV", "test");
+        var tools = java.util.List.of("*");
+        var config = new McpStdioServerConfig().setCommand("npx").setArgs(args).setEnv(env)
+                .setWorkingDirectory("/tmp/mcp").setTools(tools).setTimeout(15);
+
+        assertEquals("stdio", config.getType());
+        assertEquals("npx", config.getCommand());
+        assertEquals(args, config.getArgs());
+        assertEquals("test", config.getEnv().get("NODE_ENV"));
+        assertEquals("/tmp/mcp", config.getWorkingDirectory());
+        assertEquals(tools, config.getTools());
+        assertEquals(15, config.getTimeout());
+    }
+
+    @Test
+    void modelCapabilitiesOverrideAndNestedClassesGettersAndSetters() {
+        var supports = new ModelCapabilitiesOverride.Supports().setVision(true).setReasoningEffort(false);
+        var limits = new ModelCapabilitiesOverride.Limits().setMaxPromptTokens(1000).setMaxOutputTokens(2000)
+                .setMaxContextWindowTokens(3000);
+        var modelCapabilitiesOverride = new ModelCapabilitiesOverride().setSupports(supports).setLimits(limits);
+
+        assertEquals(supports, modelCapabilitiesOverride.getSupports());
+        assertEquals(limits, modelCapabilitiesOverride.getLimits());
+        assertTrue(modelCapabilitiesOverride.getSupports().getVision());
+        assertFalse(modelCapabilitiesOverride.getSupports().getReasoningEffort());
+        assertEquals(1000, modelCapabilitiesOverride.getLimits().getMaxPromptTokens());
+        assertEquals(2000, modelCapabilitiesOverride.getLimits().getMaxOutputTokens());
+        assertEquals(3000, modelCapabilitiesOverride.getLimits().getMaxContextWindowTokens());
+    }
 }