// Infinities should be able to be used in ranges.
TEST_F(RangeTests, Valid_Infinity) {
const Range full(-kInf, kInf);
EXPECT_TRUE(full.Valid());
const Range neg_half(-kInf, 0.0f);
EXPECT_TRUE(neg_half.Valid());
const Range pos_half(-10.0, kInf);
EXPECT_TRUE(pos_half.Valid());
}
TEST_F(RangeTests, Valid) {
// When start <= end, the range is considered valid.
const Range valid(0.0f, 1.0f);
EXPECT_TRUE(valid.Valid());
// When end > start, the range is considered invalid.
const Range invalid(1.0f, -1.0f);
EXPECT_TRUE(valid.Valid());
// By default, the range should be initialized to something invalid.
const Range invalid_default;
EXPECT_FALSE(invalid_default.Valid());
}
// 4. |-b---------| ==> return a
// |-a---|
TEST_F(RangeTests, Intersect_ContainsFirst) {
const Range a(2.0f, 3.0f);
const Range b(-10.0f, 10.0f);
const Range intersection = Range::Intersect(a, b);
EXPECT_TRUE(intersection.Valid());
EXPECT_EQ(intersection, a);
}
// 2. |-b---| |-a---| ==> return invalid
TEST_F(RangeTests, Intersect_DisjointAbove) {
const Range a(2.0f, 3.0f);
const Range b(0.0f, 1.0f);
const Range intersection = Range::Intersect(a, b);
EXPECT_FALSE(intersection.Valid());
EXPECT_TRUE(intersection.Invert().Valid());
EXPECT_EQ(intersection.Invert().Length(), 1.0f);
}