e955c94ed3
Listing the "Blender Foundation" as copyright holder implied the Blender Foundation holds copyright to files which may include work from many developers. While keeping copyright on headers makes sense for isolated libraries, Blender's own code may be refactored or moved between files in a way that makes the per file copyright holders less meaningful. Copyright references to the "Blender Foundation" have been replaced with "Blender Authors", with the exception of `./extern/` since these this contains libraries which are more isolated, any changed to license headers there can be handled on a case-by-case basis. Some directories in `./intern/` have also been excluded: - `./intern/cycles/` it's own `AUTHORS` file is planned. - `./intern/opensubdiv/`. An "AUTHORS" file has been added, using the chromium projects authors file as a template. Design task: #110784 Ref !110783.
155 lines
3.1 KiB
C++
155 lines
3.1 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Authors
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*
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* SPDX-License-Identifier: Apache-2.0 */
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#include "BLI_function_ref.hh"
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#include "testing/testing.h"
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namespace blender::tests {
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static int perform_binary_operation(int a, int b, FunctionRef<int(int, int)> operation)
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{
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return operation(a, b);
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}
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TEST(function_ref, StatelessLambda)
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{
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const int result = perform_binary_operation(4, 6, [](int a, int b) { return a - b; });
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EXPECT_EQ(result, -2);
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}
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TEST(function_ref, StatefullLambda)
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{
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const int factor = 10;
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const int result = perform_binary_operation(
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2, 3, [&](int a, int b) { return factor * (a + b); });
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EXPECT_EQ(result, 50);
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}
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static int add_two_numbers(int a, int b)
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{
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return a + b;
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}
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TEST(function_ref, StandaloneFunction)
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{
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const int result = perform_binary_operation(10, 5, add_two_numbers);
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EXPECT_EQ(result, 15);
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}
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TEST(function_ref, ConstantFunction)
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{
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auto f = []() { return 42; };
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FunctionRef<int()> ref = f;
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EXPECT_EQ(ref(), 42);
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}
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TEST(function_ref, MutableStatefullLambda)
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{
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int counter = 0;
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auto f = [&]() mutable { return counter++; };
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FunctionRef<int()> ref = f;
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EXPECT_EQ(ref(), 0);
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EXPECT_EQ(ref(), 1);
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EXPECT_EQ(ref(), 2);
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}
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TEST(function_ref, Null)
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{
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FunctionRef<int()> ref;
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EXPECT_FALSE(ref);
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auto f = []() { return 1; };
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ref = f;
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EXPECT_TRUE(ref);
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ref = {};
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EXPECT_FALSE(ref);
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}
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TEST(function_ref, CopyDoesNotReferenceFunctionRef)
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{
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auto f1 = []() { return 1; };
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auto f2 = []() { return 2; };
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FunctionRef<int()> x = f1;
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FunctionRef<int()> y = x;
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x = f2;
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EXPECT_EQ(y(), 1);
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}
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TEST(function_ref, CopyDoesNotReferenceFunctionRef2)
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{
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auto f = []() { return 1; };
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FunctionRef<int()> x;
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FunctionRef<int()> y = f;
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FunctionRef<int()> z = static_cast<const FunctionRef<int()> &&>(y);
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x = z;
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y = {};
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EXPECT_EQ(x(), 1);
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}
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TEST(function_ref, ReferenceAnotherFunctionRef)
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{
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auto f1 = []() { return 1; };
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auto f2 = []() { return 2; };
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FunctionRef<int()> x = f1;
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auto f3 = [&]() { return x(); };
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FunctionRef<int()> y = f3;
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EXPECT_EQ(y(), 1);
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x = f2;
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EXPECT_EQ(y(), 2);
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}
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TEST(function_ref, CallSafe)
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{
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FunctionRef<int()> f;
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EXPECT_FALSE(f.call_safe().has_value());
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auto func = []() { return 10; };
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f = func;
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EXPECT_TRUE(f.call_safe().has_value());
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EXPECT_EQ(*f.call_safe(), 10);
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f = {};
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EXPECT_FALSE(f.call_safe().has_value());
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BLI_STATIC_ASSERT((std::is_same_v<decltype(f.call_safe()), std::optional<int>>), "");
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}
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TEST(function_ref, CallSafeVoid)
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{
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FunctionRef<void()> f;
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BLI_STATIC_ASSERT((std::is_same_v<decltype(f.call_safe()), void>), "");
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f.call_safe();
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int value = 0;
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auto func = [&]() { value++; };
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f = func;
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f.call_safe();
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EXPECT_EQ(value, 1);
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}
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TEST(function_ref, InitializeWithNull)
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{
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FunctionRef<int(int, int)> f{nullptr};
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EXPECT_FALSE(f);
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}
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static int overload_test(const FunctionRef<void(std::string)> /*fn*/)
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{
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return 1;
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}
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static int overload_test(const FunctionRef<void(int)> /*fn*/)
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{
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return 2;
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}
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TEST(function_ref, OverloadSelection)
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{
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const auto fn_1 = [](std::string /*x*/) {};
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const auto fn_2 = [](int /*x*/) {};
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EXPECT_EQ(overload_test(fn_1), 1);
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EXPECT_EQ(overload_test(fn_2), 2);
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}
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} // namespace blender::tests
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