Add openpilot tests

tinygrad_repo/test/test_gc.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+import gc
+import unittest
+import numpy as np
+from tinygrad.tensor import Tensor
+
+def tensors_allocated():
+  return sum([isinstance(x, Tensor) for x in gc.get_objects()])
+
+class TestGC(unittest.TestCase):
+
+  def test_gc(self):
+    a = Tensor.zeros(4, 4, requires_grad=True)
+    b = Tensor.zeros(4, 4, requires_grad=True)
+    (a*b).mean().backward()
+    assert(tensors_allocated() > 0)
+    del a,b
+    assert(tensors_allocated() == 0)
+
+  def test_gc_complex(self):
+    a = Tensor(np.zeros((4, 4), dtype=np.float32), requires_grad=True)
+    b = Tensor(np.zeros((4, 4), dtype=np.float32), requires_grad=True)
+    assert(tensors_allocated() == 2)
+    (a*b).mean().backward()
+    assert(tensors_allocated() == 4)
+    del b
+    assert(tensors_allocated() == 2)
+    b = Tensor(np.zeros((4, 4), dtype=np.float32), requires_grad=True)
+    print(tensors_allocated())
+    (a*b).mean().backward()
+    print(tensors_allocated())
+    assert(tensors_allocated() == 4)
+    del b
+    assert(tensors_allocated() == 2)
+
+if __name__ == '__main__':
+  unittest.main()