test: added a basic unit tests and one end-to-end integration test

Author: Inmoresentum

examples/optimized_mlp_float32.h renamed to include/dummy_mlp_float32.h

@@ -0,0 +1,72 @@
+//
+// Created by Inmoresentum on 1/20/25.
+//
+
+#include <unity.h>
+#include <Arduino.h>
+#include <esp32_tflm_wrapper.h>
+#include "dummy_mlp_float32.h"
+
+#define ARENA_SIZE 4700
+#define TF_NUM_OPS 2
+#define TF_NUM_INPUTS 13
+#define TF_NUM_OUTPUTS 4
+
+Eloquent::TF::Sequential<TF_NUM_OPS, ARENA_SIZE> testMLP;
+
+// Test inputs
+float test_inputs[] = {
+    60.000000, 1.000000, 58.000000, 58.000000, 72.000000, 454.000000, 445.000000,
+    23.000000, 30.000000, 10.000000, 219.000000, 255.000000, 446.000000
+};
+
+void setUp(void) {
+    // Initialize the model before each test
+    testMLP.setNumInputs(TF_NUM_INPUTS);
+    testMLP.setNumOutputs(TF_NUM_OUTPUTS);
+    testMLP.resolver.AddFullyConnected();
+    testMLP.resolver.AddSoftmax();
+    TEST_ASSERT_TRUE(testMLP.begin(GeneratedCHeaderFile_simple_mlp_for_testing).isOk());
+}
+
+void tearDown(void) {
+    // Clean up after each test if needed
+}
+
+void test_model_initialization() {
+    TEST_ASSERT_EQUAL(TF_NUM_INPUTS, testMLP.numInputs);
+    TEST_ASSERT_EQUAL(TF_NUM_OUTPUTS, testMLP.numOutputs);
+}
+
+void test_prediction_success() {
+    TEST_ASSERT_TRUE(testMLP.predict(test_inputs).isOk());
+}
+
+void test_prediction_class() {
+    testMLP.predict(test_inputs);
+    TEST_ASSERT_EQUAL(2, testMLP.classification);
+}
+
+void test_prediction_output_range() {
+    testMLP.predict(test_inputs);
+    // Check if all output probabilities are between 0 and 1
+    for (u_int16_t i = 0; i < TF_NUM_OUTPUTS; i++) {
+        TEST_ASSERT_TRUE(testMLP.outputs[i] >= 0.0f && testMLP.outputs[i] <= 1.0f);
+    }
+}
+
+void setup() {
+    delay(2000);  // Allow some time for board initialization
+    UNITY_BEGIN();
+
+    RUN_TEST(test_model_initialization);
+    RUN_TEST(test_prediction_success);
+    RUN_TEST(test_prediction_class);
+    RUN_TEST(test_prediction_output_range);
+
+    UNITY_END();
+}
+
+void loop() {
+    // Nothing to do here
+}