test for stencil math function sqrt added

tests/test_compile_math.py

@@ -0,0 +1,53 @@
+from copapy import variable
+from copapy.backend import Write, compile_to_dag, add_read_command
+import copapy as cp
+import subprocess
+from copapy import _binwrite
+import copapy.backend
+
+
+def run_command(command: list[str]) -> str:
+    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, encoding='utf8', check=False)
+    assert result.returncode != 11, f"SIGSEGV (segmentation fault)\n -Error occurred: {result.stderr}\n -Output: {result.stdout}"
+    assert result.returncode == 0, f"\n -Error occurred: {result.stderr}\n -Output: {result.stdout}"
+    return result.stdout
+
+
+def test_compile():
+    test_vals = [0.0, 0.0001, 0.1, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.28318530718, 100.0, 1000.0, 100000.0]
+
+    test_vals = [100000.0]
+
+    ret = [r for v in test_vals for r in (cp.sqrt(variable(v)),)]
+
+
+    out = [Write(r) for r in ret]
+
+    il, variables = compile_to_dag(out, copapy.generic_sdb)
+
+    # run program command
+    il.write_com(_binwrite.Command.RUN_PROG)
+
+    for net in ret:
+        assert isinstance(net, copapy.backend.Net)
+        add_read_command(il, variables, net)
+
+    il.write_com(_binwrite.Command.END_COM)
+
+    print('* Data to runner:')
+    il.print()
+
+    il.to_file('bin/test.copapy')
+
+    result = run_command(['bin/coparun', 'bin/test.copapy'])
+    print('* Output from runner:\n--')
+    print(result)
+    print('--')
+
+    assert 'Return value: 1' in result
+    #assert 'END_COM' in result
+
+
+if __name__ == "__main__":
+    #test_example()
+    test_compile()