ArduinoJson/test/StaticJsonBufferTests.cpp

#include <gtest/gtest.h>
#include <ArduinoJson/StaticJsonBuffer.h>
#include <ArduinoJson/JsonValue.h>

using namespace ArduinoJson;

TEST(StaticJsonBuffer, CapacityMatchTemplateParameter)
{
    StaticJsonBuffer<42> json;   
    EXPECT_EQ(42, json.capacity());
}

TEST(StaticJsonBuffer, InitialSizeIsZero)
{
    StaticJsonBuffer<42> json;
    EXPECT_EQ(0, json.size());
}

TEST(StaticJsonBuffer, WhenCreateObjectIsCalled_ThenSizeIsIncreasedByOne)
{
    StaticJsonBuffer<42> json;

    json.createObject();
    EXPECT_EQ(1, json.size());
    
    json.createObject();
    EXPECT_EQ(2, json.size());
}

TEST(StaticJsonBuffer, GivenBufferIsFull_WhenCreateObjectIsCalled_ThenSizeDoesNotChange)
{
    StaticJsonBuffer<1> json;

    json.createObject();
    EXPECT_EQ(1, json.size());

    json.createObject();
    EXPECT_EQ(1, json.size());
}

TEST(StaticJsonBuffer, WhenCreateObjectIsCalled_ThenAnEmptyJsonObjectIsReturned)
{
    StaticJsonBuffer<42> json;

    JsonObject obj = json.createObject();
    EXPECT_EQ(0, obj.size());
}

TEST(StaticJsonBuffer, GivenAJsonObject_WhenValuesAreAdded_ThenSizeIsIncreasedByTwo)
{
    StaticJsonBuffer<42> json;
    JsonObject obj = json.createObject();    

    obj["hello"]; 
    EXPECT_EQ(3, json.size());

    obj["world"];
    EXPECT_EQ(5, json.size());
}

TEST(StaticJsonBuffer, GivenAJsonObject_WhenSameValuesAreAddedTwice_ThenSizeIsOnlyIncreasedByTwo)
{
    StaticJsonBuffer<42> json;
    JsonObject obj = json.createObject();

    obj["hello"];
    EXPECT_EQ(3, json.size());

    obj["hello"];
    EXPECT_EQ(3, json.size());
}