Fixed issue #68

test/StaticJsonBuffer_CreateObject_Tests.cpp

@@ -0,0 +1,48 @@
+// Copyright Benoit Blanchon 2014-2015
+// MIT License
+//
+// Arduino JSON library
+// https://github.com/bblanchon/ArduinoJson
+
+#include <gtest/gtest.h>
+#include <ArduinoJson.h>
+
+TEST(StaticJsonBuffer_CreateObject_Tests, GrowsWithObject) {
+  StaticJsonBuffer<JSON_OBJECT_SIZE(3)> json;
+
+  JsonObject &obj = json.createObject();
+  ASSERT_EQ(JSON_OBJECT_SIZE(0), json.size());
+
+  obj["hello"];
+  ASSERT_EQ(JSON_OBJECT_SIZE(1), json.size());
+
+  obj["world"];
+  ASSERT_EQ(JSON_OBJECT_SIZE(2), json.size());
+
+  obj["world"];  // <- same value, should not grow
+  ASSERT_EQ(JSON_OBJECT_SIZE(2), json.size());
+}
+
+TEST(StaticJsonBuffer_CreateObject_Tests, SucceedWhenBigEnough) {
+  StaticJsonBuffer<JSON_OBJECT_SIZE(0)> json;
+
+  JsonObject &object = json.createObject();
+  ASSERT_TRUE(object.success());
+}
+
+TEST(StaticJsonBuffer_CreateObject_Tests, FailsWhenTooSmall) {
+  StaticJsonBuffer<JSON_OBJECT_SIZE(0) - 1> json;
+
+  JsonObject &object = json.createObject();
+  ASSERT_FALSE(object.success());
+}
+
+TEST(StaticJsonBuffer_CreateObject_Tests, ObjectDoesntGrowWhenFull) {
+  StaticJsonBuffer<JSON_OBJECT_SIZE(1)> json;
+
+  JsonObject &obj = json.createObject();
+  obj["hello"];
+  obj["world"];
+
+  ASSERT_EQ(JSON_OBJECT_SIZE(1), json.size());
+}