1 files changed, 66 insertions, 0 deletions
diff --git a/libcxx/test/std/numerics/complex.number/complex.transcendentals/log10.pass.cpp b/libcxx/test/std/numerics/complex.number/complex.transcendentals/log10.pass.cpp
new file mode 100644
index 00000000000..ba03ebf8ad2
--- /dev/null
+++ b/libcxx/test/std/numerics/complex.number/complex.transcendentals/log10.pass.cpp
@@ -0,0 +1,66 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <complex>
+
+// template<class T>
+//   complex<T>
+//   log10(const complex<T>& x);
+
+#include <complex>
+#include <cassert>
+
+#include "../cases.h"
+
+template <class T>
+void
+test(const std::complex<T>& c, std::complex<T> x)
+{
+    assert(log10(c) == x);
+}
+
+template <class T>
+void
+test()
+{
+    test(std::complex<T>(0, 0), std::complex<T>(-INFINITY, 0));
+}
+
+void test_edges()
+{
+    const double pi = std::atan2(+0., -0.);
+    const unsigned N = sizeof(x) / sizeof(x[0]);
+    for (unsigned i = 0; i < N; ++i)
+    {
+        std::complex<double> r = log10(x[i]);
+        std::complex<double> z = log(x[i])/std::log(10);
+        if (std::isnan(real(r)))
+            assert(std::isnan(real(z)));
+        else
+        {
+            assert(real(r) == real(z));
+            assert(std::signbit(real(r)) == std::signbit(real(z)));
+        }
+        if (std::isnan(imag(r)))
+            assert(std::isnan(imag(z)));
+        else
+        {
+            assert(imag(r) == imag(z));
+            assert(std::signbit(imag(r)) == std::signbit(imag(z)));
+        }
+    }
+}
+
+int main()
+{
+    test<float>();
+    test<double>();
+    test<long double>();
+    test_edges();
+}