test_eval.cpp
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1 /*
2  tests/test_eval.cpp -- Usage of eval() and eval_file()
3 
4  Copyright (c) 2016 Klemens D. Morgenstern
5 
6  All rights reserved. Use of this source code is governed by a
7  BSD-style license that can be found in the LICENSE file.
8 */
9 
10 #include <pybind11/eval.h>
11 
12 #include "pybind11_tests.h"
13 
14 #include <utility>
15 
16 TEST_SUBMODULE(eval_, m) {
17  // test_evals
18 
19  auto global = py::dict(py::module_::import("__main__").attr("__dict__"));
20 
21  m.def("test_eval_statements", [global]() {
22  auto local = py::dict();
23  local["call_test"] = py::cpp_function([&]() -> int { return 42; });
24 
25  // Regular string literal
26  py::exec("message = 'Hello World!'\n"
27  "x = call_test()",
28  global,
29  local);
30 
31  // Multi-line raw string literal
32  py::exec(R"(
33  if x == 42:
34  print(message)
35  else:
36  raise RuntimeError
37  )",
38  global,
39  local);
40  auto x = local["x"].cast<int>();
41 
42  return x == 42;
43  });
44 
45  m.def("test_eval", [global]() {
46  auto local = py::dict();
47  local["x"] = py::int_(42);
48  auto x = py::eval("x", global, local);
49  return x.cast<int>() == 42;
50  });
51 
52  m.def("test_eval_single_statement", []() {
53  auto local = py::dict();
54  local["call_test"] = py::cpp_function([&]() -> int { return 42; });
55 
56  auto result = py::eval<py::eval_single_statement>("x = call_test()", py::dict(), local);
57  auto x = local["x"].cast<int>();
58  return result.is_none() && x == 42;
59  });
60 
61  m.def("test_eval_file", [global](py::str filename) {
62  auto local = py::dict();
63  local["y"] = py::int_(43);
64 
65  int val_out = 0;
66  local["call_test2"] = py::cpp_function([&](int value) { val_out = value; });
67 
68  auto result = py::eval_file(std::move(filename), global, local);
69  return val_out == 43 && result.is_none();
70  });
71 
72  m.def("test_eval_failure", []() {
73  try {
74  py::eval("nonsense code ...");
75  } catch (py::error_already_set &) {
76  return true;
77  }
78  return false;
79  });
80 
81  m.def("test_eval_file_failure", []() {
82  try {
83  py::eval_file("non-existing file");
84  } catch (std::exception &) {
85  return true;
86  }
87  return false;
88  });
89 
90  // test_eval_empty_globals
91  m.def("eval_empty_globals", [](py::object global) {
92  if (global.is_none()) {
93  global = py::dict();
94  }
95  auto int_class = py::eval("isinstance(42, int)", global);
96  return global;
97  });
98 
99  // test_eval_closure
100  m.def("test_eval_closure", []() {
101  py::dict global;
102  global["closure_value"] = 42;
103  py::dict local;
104  local["closure_value"] = 0;
105  py::exec(R"(
106  local_value = closure_value
107 
108  def func_global():
109  return closure_value
110 
111  def func_local():
112  return local_value
113  )",
114  global,
115  local);
116  return std::make_pair(global, local);
117  });
118 }
Matrix3f m
object eval_file(str fname, object global=globals(), object local=object())
Definition: eval.h:112
void exec(const str &expr, object global=globals(), object local=object())
Definition: eval.h:88
Values result
internal::nested_eval< T, 1 >::type eval(const T &xpr)
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TEST_SUBMODULE(eval_, m)
Definition: test_eval.cpp:16


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autogenerated on Tue Jul 4 2023 02:37:45