Increase coverage (#41)

Author: Expander

test/test_Cl1.cpp

@@ -17,13 +17,15 @@ TEST_CASE("test_real_fixed_values")
       const auto x64 = static_cast<double>(x128);
       const auto cl128_expected = v.second;
       const auto cl64_expected = static_cast<double>(cl128_expected);
-
-      const auto cl64_poly    = polylogarithm::Cl1(x64);
+      const auto cl64_poly = polylogarithm::Cl1(x64);
 
       INFO("x(64)         = " << x64);
       INFO("Cl1(64)  real = " << cl64_expected  << " (expected)");
       INFO("Cl1(64)  real = " << cl64_poly      << " (polylogarithm C++)");
 
       CHECK_CLOSE(cl64_poly, cl64_expected, 4*eps64);
+      CHECK_CLOSE(polylogarithm::Cl1(-x64), cl64_expected, 4*eps64);
+      CHECK_CLOSE(polylogarithm::Cl1(x64 + 2*M_PI), cl64_expected, 10*eps64);
+      CHECK_CLOSE(polylogarithm::Cl1(x64 - 2*M_PI), cl64_expected, 10*eps64);
    }
 }

test/test_eta.cpp

@@ -2,11 +2,25 @@
 
 #include "doctest.h"
 #include "eta.hpp"
+#include "test.hpp"
+#include <cmath>
 
 TEST_CASE("test_fixed_values")
 {
    using polylogarithm::neg_eta;
 
+   if (has_inf()) {
+      CHECK(std::isinf(neg_eta(-221)));
+      CHECK(std::isinf(neg_eta(-219)));
+   }
+   CHECK(neg_eta(-222) == 0.0);
+   CHECK(neg_eta(-220) == 0.0);
+   CHECK(neg_eta(-218) == 0.0);
+   CHECK(neg_eta(-110) == 0.0);
+   CHECK(neg_eta(-3) == 1.0/8);
+   CHECK(neg_eta(-2) == 0.0);
+   CHECK(neg_eta(-1) == -0.25);
+   CHECK(neg_eta(0)  == -0.5);
    CHECK(neg_eta(1)  == -0.69314718055994531);
    CHECK(neg_eta(2)  == -0.82246703342411322);
    CHECK(neg_eta(52) == -0.9999999999999998);