c1bc70b711
A lot of files were missing copyright field in the header and
the Blender Foundation contributed to them in a sense of bug
fixing and general maintenance.
This change makes it explicit that those files are at least
partially copyrighted by the Blender Foundation.
Note that this does not make it so the Blender Foundation is
the only holder of the copyright in those files, and developers
who do not have a signed contract with the foundation still
hold the copyright as well.
Another aspect of this change is using SPDX format for the
header. We already used it for the license specification,
and now we state it for the copyright as well, following the
FAQ:
https://reuse.software/faq/
155 lines
3.1 KiB
C++
155 lines
3.1 KiB
C++
/* SPDX-FileCopyrightText: 2023 Blender Foundation
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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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