diff -r 84a5fab8a47c -r b428424c0214 tests/test_json.c
--- a/tests/test_json.c	Tue Oct 22 22:42:48 2024 +0200
+++ b/tests/test_json.c	Tue Oct 22 23:10:31 2024 +0200
@@ -30,6 +30,17 @@
 
 #include "cx/json.h"
 
+CX_TEST(test_json_init_default) {
+    CxJson json;
+    CX_TEST_DO {
+        cxJsonInit(&json);
+        CX_TEST_ASSERT(json.states == json.states_internal);
+        CX_TEST_ASSERT(json.nstates == 0);
+        CX_TEST_ASSERT(json.states_alloc == 8);
+        CX_TEST_ASSERT(json.reader_array_alloc == 8);
+    }
+}
+
 CX_TEST(test_json_simple_object) {
     cxstring text = cx_str(
             "{\n"
@@ -184,12 +195,59 @@
     }
 }
 
+CX_TEST(test_json_large_nesting_depth) {
+    CxJson json;
+    CxJsonValue *d1;
+    cxstring text = cx_str("{\"test\": [{},{\"foo\": [[{\"bar\":[4, 2, [null, {\"key\": 47}]]}]]}]}");
+    CX_TEST_DO {
+        cxJsonInit(&json);
+        cxJsonFill(&json, text.ptr, text.length);
+        cxJsonNext(&json, &d1);
+
+        CX_TEST_ASSERT(d1 != NULL);
+        CX_TEST_ASSERT(cxJsonIsObject(d1));
+        CxJsonValue *d2 = cxJsonObjGet(d1, "test");
+        CX_TEST_ASSERT(cxJsonIsArray(d2));
+        CX_TEST_ASSERT(cxJsonArrSize(d2) == 2);
+        CxJsonValue *d3 = cxJsonArrGet(d2, 1);
+        CX_TEST_ASSERT(cxJsonIsObject(d3));
+        CxJsonValue *d4 = cxJsonObjGet(d3, "foo");
+        CX_TEST_ASSERT(cxJsonIsArray(d4));
+        CX_TEST_ASSERT(cxJsonArrSize(d4) == 1);
+        CxJsonValue *d5 = cxJsonArrGet(d4, 0);
+        CX_TEST_ASSERT(cxJsonIsArray(d5));
+        CX_TEST_ASSERT(cxJsonArrSize(d5) == 1);
+        CxJsonValue *d6 = cxJsonArrGet(d5, 0);
+        CX_TEST_ASSERT(cxJsonIsObject(d6));
+        CxJsonValue *d7 = cxJsonObjGet(d6, "bar");
+        CX_TEST_ASSERT(cxJsonIsArray(d7));
+        CX_TEST_ASSERT(cxJsonArrSize(d7) == 3);
+        CxJsonValue *d8 = cxJsonArrGet(d7, 2);
+        CX_TEST_ASSERT(cxJsonIsArray(d8));
+        CX_TEST_ASSERT(cxJsonArrSize(d8) == 2);
+        CxJsonValue *d9a = cxJsonArrGet(d8, 0);
+        CX_TEST_ASSERT(cxJsonIsNull(d9a));
+        CxJsonValue *d9b = cxJsonArrGet(d8, 1);
+        CX_TEST_ASSERT(cxJsonIsObject(d9b));
+        CxJsonValue *d10 = cxJsonObjGet(d9b, "key");
+        CX_TEST_ASSERT(cxJsonIsInteger(d10));
+        CX_TEST_ASSERT(cxJsonAsInteger(d10) == 47);
+
+        CX_TEST_ASSERT(json.states != json.states_internal);
+        CX_TEST_ASSERT(json.states_alloc > cx_nmemb(json.states_internal));
+
+        cxJsonDestroy(&json);
+    }
+}
+
 CxTestSuite *cx_test_suite_json(void) {
     CxTestSuite *suite = cx_test_suite_new("json");
 
+    cx_test_register(suite, test_json_init_default);
     cx_test_register(suite, test_json_simple_object);
     cx_test_register(suite, test_json_object_incomplete_token);
     cx_test_register(suite, test_json_object_error);
+    cx_test_register(suite, test_json_large_nesting_depth);
 
     return suite;
 }