feat(solver-bootstrap): step 3 — core-ids-and-diagnostics

tests/unit/core/vec3_test.cpp

@@ -0,0 +1,20 @@
+#include <limits>
+
+#include <gtest/gtest.h>
+
+#include <fesa/core/vec3.hpp>
+
+namespace {
+
+TEST(CoreVec3, ReportsOnlyFiniteVectorsAsFinite) {
+    EXPECT_TRUE(fesa::is_finite(fesa::Vec3{1.0, -2.0, 0.0}));
+
+    const double infinity = std::numeric_limits<double>::infinity();
+    const double nan = std::numeric_limits<double>::quiet_NaN();
+
+    EXPECT_FALSE(fesa::is_finite(fesa::Vec3{infinity, 0.0, 0.0}));
+    EXPECT_FALSE(fesa::is_finite(fesa::Vec3{0.0, -infinity, 0.0}));
+    EXPECT_FALSE(fesa::is_finite(fesa::Vec3{0.0, 0.0, nan}));
+}
+
+}  // namespace