1 files changed, 22 insertions, 0 deletions

diff --git a/src/lib/test/test_util.h b/src/lib/test/test_util.h
new file mode 100644
index 0000000..8abb99a
--- /dev/null
+++ b/src/lib/test/test_util.h
@@ -0,0 +1,22 @@
+#pragma once
+
+#include <neuralnet/types.h>
+
+#include <math.h>
+
+// General epsilon for comparing values.
+static const R EPS = 1e-10;
+
+// Epsilon for comparing network weights after training.
+static const R WEIGHT_EPS = 0.01;
+
+// Epsilon for comparing network outputs after training.
+static const R OUTPUT_EPS = 0.01;
+
+static inline bool double_eq(double a, double b, double eps) {
+  return fabs(a - b) <= eps;
+}
+
+static inline R lerp(R a, R b, R t) {
+  return a + t*(b-a);
+}