fix u8 diff with thr 1.

Signed-off-by: xipingya <xiping.yan@intel.com>

Author: xipingyan

tests/module_genai/cpp/modules/UniPCMultistepScheduler.cpp

@@ -84,6 +84,8 @@ std::vector<UniPCMultistepSchedulerTestData> unipc_multistep_scheduler_test_data
 }
 
 class UniPCMultistepSchedulerTest : public ::testing::TestWithParam<UniPCMultistepSchedulerTestData> {
+private:
+    float m_threshold = 1e-2;
 public:
     static std::string get_test_case_name(const testing::TestParamInfo<UniPCMultistepSchedulerTestData> & obj) {
         std::string test_type;
@@ -110,7 +112,7 @@ class UniPCMultistepSchedulerTest : public ::testing::TestWithParam<UniPCMultist
         auto sigmas_data = sigmas.data<const float>();
 
         for (size_t i = 0; i < sigmas.get_size(); ++i) {
-            EXPECT_NEAR(sigmas_data[i], data.expected_sigmas[i], 1e-4);
+            EXPECT_NEAR(sigmas_data[i], data.expected_sigmas[i], m_threshold);
         }
 
         for (size_t i = 0; i < timesteps.size(); ++i) {
@@ -138,7 +140,7 @@ class UniPCMultistepSchedulerTest : public ::testing::TestWithParam<UniPCMultist
 
         latents_data = latents.data<float>();
         for (size_t i = 0; i < data.expected_latents.size(); i++) {
-            EXPECT_NEAR(latents_data[i], data.expected_latents[i], 1e-4);
+            EXPECT_NEAR(latents_data[i], data.expected_latents[i], m_threshold);
         }
     }
 };

tests/module_genai/cpp/modules/VAEDecoderModule.cpp

@@ -15,6 +15,7 @@ struct VAEDecoderTestData {
     std::vector<uint8_t> expected_output_u8;
     std::vector<float> expected_output_f32;
     float threshold;
+    uint8_t threshold_u8;
 };
 
 namespace TEST_DATA {
@@ -26,6 +27,7 @@ VAEDecoderTestData vae_decoder_with_postprocess() {
     data.enable_postprocess = true;
     data.expected_output_u8 = {120, 150, 165, 104, 128, 145, 93, 108, 127, 92};
     data.threshold = 0.0f;
+    data.threshold_u8 = 1;
     return data;
 }
 
@@ -37,6 +39,7 @@ VAEDecoderTestData vae_decoder_skip_postprocess() {
     data.expected_output_f32 = {-0.0553406f, -0.177907f, -0.268292f, -0.276685f, -0.182945f,
                                  0.0203716f, 0.255036f, 0.342477f, 0.279524f, 0.0960406f};
     data.threshold = 1e-2f;
+    data.threshold_u8 = 1;
     return data;
 }
 
@@ -110,7 +113,7 @@ class VAEDecoderModuleTest : public ModuleTestBase, public ::testing::TestWithPa
         EXPECT_GT(image.get_size(), 0) << "VAE decoder output is empty";
 
         if (m_test_data.enable_postprocess) {
-            EXPECT_TRUE(compare_big_tensor<uint8_t>(image, m_test_data.expected_output_u8))
+            EXPECT_TRUE(compare_big_tensor<uint8_t>(image, m_test_data.expected_output_u8, m_test_data.threshold_u8))
                 << "decoder output does not match expected values";
         } else {
             // Use non-template version that supports threshold for float comparison

tests/module_genai/cpp/utils/ut_modules_base.hpp

@@ -95,7 +95,7 @@ class ModuleTestBase {
             T exp_val = static_cast<T>(expected_top[i]);
             if (std::fabs(val - exp_val) > thr) {
                 bresult = false;
-                std::cout << "Mismatch at index " << i << ": expected " << expected_top[i] << ", got " << val
+                std::cout << "Mismatch at index " << i << ": expected " << static_cast<double>(exp_val) << ", got " << static_cast<double>(val)
                           << std::endl;
             }
         }