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Add tests for negative operator

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This commit is contained in:
Artem Zyktin 2026-06-02 05:51:17 +08:00
parent 6f7dbe7528
commit 6da0449d82
2 changed files with 100 additions and 4 deletions
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30
src/tests/naive_tests.cpp
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@ -253,4 +253,34 @@ TEST(naive_vec4, cross_parallel)
EXPECT_TRUE(approx_eq(cross3(a, b), check)); EXPECT_TRUE(approx_eq(cross3(a, b), check));
} }
TEST(naive_vec4, neg_basic)
{
vec4 a = { 1.0f, -2.0f, 3.0f, -4.0f };
vec4 check = { -1.0f, 2.0f, -3.0f, 4.0f };
EXPECT_TRUE(approx_eq(-a, check));
}
TEST(naive_vec4, neg_zero)
{
vec4 a = { 0.0f, 0.0f, 0.0f, 0.0f };
EXPECT_TRUE(approx_eq(-a, a));
}
TEST(naive_vec4, neg_double)
{
vec4 a = { 1.0f, 2.0f, 3.0f, 4.0f };
EXPECT_TRUE(approx_eq(-(-a), a));
}
TEST(naive_vec4, neg_compound)
{
vec4 a = { 5.0f, 3.0f, 1.0f, 0.0f };
vec4 b = { 2.0f, 1.0f, 4.0f, 0.0f };
EXPECT_TRUE(approx_eq(a + (-b), a - b));
}
} }

74
src/tests/vec4_tests.cpp
View File

@ -257,8 +257,8 @@ TEST(vec4, dot3_times_literal_collapses)
auto r = dot3(a, b) * 2.0f; auto r = dot3(a, b) * 2.0f;
static_assert(!std::is_same_v<decltype(r), float>); EXPECT_TRUE((!std::same_as<decltype(r), float>));
static_assert(scalar_expr<decltype(r)>); EXPECT_TRUE((scalar_expr<decltype(r)>));
} }
TEST(vec4, magnitude3_times_literal_collapses) TEST(vec4, magnitude3_times_literal_collapses)
@ -267,8 +267,74 @@ TEST(vec4, magnitude3_times_literal_collapses)
auto r = magnitude3(a) * 2.0f; auto r = magnitude3(a) * 2.0f;
static_assert(!std::is_same_v<decltype(r), float>); EXPECT_TRUE((!std::same_as<decltype(r), float>));
static_assert(scalar_expr<decltype(r)>); EXPECT_TRUE((scalar_expr<decltype(r)>));
}
TEST(vec4, neg_basic)
{
vec4 a = { 1.0f, -2.0f, 3.0f, -4.0f };
vec4 check = { -1.0f, 2.0f, -3.0f, 4.0f };
EXPECT_TRUE(approx_eq(-a, check));
}
TEST(vec4, neg_zero)
{
vec4 a = { 0.0f, 0.0f, 0.0f, 0.0f };
EXPECT_TRUE(approx_eq(-a, a));
}
TEST(vec4, neg_double)
{
vec4 a = { 1.0f, 2.0f, 3.0f, 4.0f };
EXPECT_TRUE(approx_eq(-(-a), a));
}
TEST(vec4, neg_compound)
{
vec4 a = { 5.0f, 3.0f, 1.0f, 0.0f };
vec4 b = { 2.0f, 1.0f, 4.0f, 0.0f };
vec4 check = { 3.0f, 2.0f, -3.0f, 0.0f };
vec4 result = a + (-b);
EXPECT_TRUE(approx_eq(check, result));
}
TEST(vec4, neg_expression)
{
vec4 a = { 1.0f, 2.0f, 3.0f, 0.0f };
vec4 b = { 4.0f, 5.0f, 6.0f, 0.0f };
vec4 check = { -5.0f, -7.0f, -9.0f, 0.0f };
vec4 result = -(a + b);
EXPECT_TRUE((vec_expr<decltype(-(a + b))>));
EXPECT_TRUE(approx_eq(check, result));
}
TEST(vec4, neg_scalar_stays_lazy)
{
vec4 a = { 1.0f, 0.0f, 0.0f, 0.0f };
vec4 b = { 1.0f, 0.0f, 0.0f, 0.0f };
float check = -1.0f;
float result = -dot3(a, b);
EXPECT_TRUE((scalar_expr<decltype(-dot3(a, b))>));
EXPECT_FLOAT_EQ(check, result);
}
TEST(vec4, neg_scalar_in_expression)
{
vec4 a = { 2.0f, 0.0f, 0.0f, 0.0f };
vec4 b = { 1.0f, 0.0f, 0.0f, 0.0f };
vec4 c = { 1.0f, 1.0f, 1.0f, 0.0f };
vec4 check = { -2.0f, -2.0f, -2.0f, 0.0f };
vec4 result = c * (-dot3(a, b));
EXPECT_TRUE(approx_eq(check, result));
} }
} }