test(client): expose config propagation semantics

Author: loong10k

src/test/java/io/github/easy4j/codex/CodexClientTest.java

@@ -242,6 +242,20 @@ void shouldDelegateExecWithDisable() {
     // execAndParse
     // ----------------------------------------------------------------
 
+    @Test
+    void shouldForceJsonForExecAndParseWhenDefaultJsonOutputIsDisabled() {
+        CodexClientConfig config = new CodexClientConfig();
+        config.setLocalExecutable("/bin/sh " + JSON_FLAG_SCRIPT);
+        config.setLocalTimeoutSeconds(2);
+        config.setJsonOutput(false);
+
+        List<CodexEvent> events = new CodexClient(config).execAndParse("hello");
+
+        assertEquals(1, events.size(),
+                "execAndParse must force --json even when the normal exec default disables JSON");
+        assertEquals("done", events.get(0).getType());
+    }
+
     @Test
     void shouldReturnEmptyListForBlankOutput() {
         // echo with no JSON-Lines content
@@ -704,6 +718,28 @@ void shouldCloseWithoutError() {
     // default options from config
     // ----------------------------------------------------------------
 
+    @Test
+    void shouldHonorJsonOutputFalseForDefaultExec() {
+        CodexClientConfig config = echoConfig();
+        config.setJsonOutput(false);
+
+        CodexCliResult result = new CodexClient(config).exec("hello");
+
+        assertFalse(result.getStdout().contains("--json"),
+                "normal exec must honor CodexClientConfig.jsonOutput=false");
+    }
+
+    @Test
+    void shouldPropagateNoAltScreenToDefaultInteractiveSession() {
+        CodexClientConfig config = echoConfig();
+        config.setNoAltScreen(true);
+
+        CodexCliResult result = new CodexClient(config).startSession("hello");
+
+        assertTrue(result.getStdout().contains("--no-alt-screen"),
+                "default interactive session must honor noAltScreen");
+    }
+
     @Test
     void shouldPropagateConfigDefaultsToExecOptions() {
         CodexClientConfig config = echoConfig();