tests: move to root directory

tests/test_sigproc.py

@@ -0,0 +1,25 @@
+import sigproc
+import itertools
+import config
+import numpy as np
+import random
+
+
+def test_qam():
+    q = sigproc.QAM(config.symbols)
+    r = random.Random(0)
+    m = q.bits_per_symbol
+    bits = [tuple(r.randint(0, 1) for j in range(m)) for i in range(1024)]
+    stream = itertools.chain(*bits)
+    S = q.encode(list(stream))
+    decoded = list(q.decode(list(S)))
+    assert decoded == bits
+
+
+def test_linreg():
+    x = np.array([1, 3, 2, 8, 4, 6, 9, 7, 0, 5])
+    a, b = 12.3, 4.56
+    y = a * x + b
+    a_, b_ = sigproc.linear_regression(x, y)
+    assert abs(a - a_) < 1e-10
+    assert abs(b - b_) < 1e-10