1 files changed, 28 insertions, 0 deletions
diff --git a/src/tests/audio/test_window.cc b/src/tests/audio/test_window.cc
new file mode 100644
index 0000000..bac4a4b
--- /dev/null
+++ b/src/tests/audio/test_window.cc
@@ -0,0 +1,28 @@
+// This file is part of the 64k demo project.
+// It validates the mathematical properties of the Hamming window.
+// Ensures the window peaks at the center and has correct symmetry.
+
+#include "audio/window.h"
+#include <assert.h>
+#include <math.h>
+#include <stdio.h>
+
+int main() {
+  printf("Running HammingWindow tests...\n");
+
+  float window[WINDOW_SIZE];
+  hamming_window_512(window);
+
+  // Check symmetry
+  for (int i = 0; i < WINDOW_SIZE / 2; ++i) {
+    assert(fabsf(window[i] - window[WINDOW_SIZE - 1 - i]) < 1e-6f);
+  }
+
+  // Check peak (should be at the center for even size, it's actually split
+  // between 255 and 256)
+  assert(window[255] > 0.99f);
+  assert(window[256] > 0.99f);
+
+  printf("HammingWindow tests PASSED\n");
+  return 0;
+}