XCEngine/tests/RHI/OpenGL/test_sampler.cpp

#include "fixtures/OpenGLTestFixture.h"
#include "XCEngine/RHI/OpenGL/OpenGLSampler.h"

using namespace XCEngine::RHI;

TEST_F(OpenGLTestFixture, Sampler_Initialize_Default) {
    OpenGLSampler sampler;
    OpenGLSamplerDesc desc;

    bool result = sampler.Initialize(desc);

    ASSERT_TRUE(result);
    EXPECT_NE(sampler.GetID(), 0u);

    sampler.Shutdown();
}

TEST_F(OpenGLTestFixture, Sampler_Initialize_Custom) {
    OpenGLSampler sampler;
    OpenGLSamplerDesc desc;
    desc.minFilter = SamplerFilter::LinearMipmapLinear;
    desc.magFilter = SamplerFilter::Linear;
    desc.wrapS = SamplerWrapMode::Repeat;
    desc.wrapT = SamplerWrapMode::Repeat;
    desc.wrapR = SamplerWrapMode::ClampToEdge;

    bool result = sampler.Initialize(desc);

    ASSERT_TRUE(result);
    EXPECT_NE(sampler.GetID(), 0u);

    sampler.Shutdown();
}

TEST_F(OpenGLTestFixture, Sampler_Bind_Unbind) {
    OpenGLSampler sampler;
    OpenGLSamplerDesc desc;
    sampler.Initialize(desc);

    sampler.Bind(0);
    GLint boundSampler = 0;
    glGetIntegerv(GL_SAMPLER_BINDING, &boundSampler);
    EXPECT_EQ(boundSampler, static_cast<GLint>(sampler.GetID()));

    sampler.Unbind(0);
    glGetIntegerv(GL_SAMPLER_BINDING, &boundSampler);
    EXPECT_EQ(boundSampler, 0);

    sampler.Shutdown();
}

TEST_F(OpenGLTestFixture, Sampler_GetID_ReturnsValid) {
    OpenGLSampler sampler;
    OpenGLSamplerDesc desc;
    sampler.Initialize(desc);

    EXPECT_NE(sampler.GetID(), 0u);

    sampler.Shutdown();
}