1 files changed, 106 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/map/difference.cpp b/src/boost/libs/hana/test/map/difference.cpp
new file mode 100644
index 000000000..5d1b4f450
--- /dev/null
+++ b/src/boost/libs/hana/test/map/difference.cpp
@@ -0,0 +1,106 @@
+// Copyright Louis Dionne 2013-2017
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
+
+#include <boost/hana/assert.hpp>
+#include <boost/hana/difference.hpp>
+#include <boost/hana/equal.hpp>
+#include <boost/hana/map.hpp>
+
+#include <laws/base.hpp>
+#include <support/minimal_product.hpp>
+namespace hana = boost::hana;
+
+
+template <int i>
+auto key() { return hana::test::ct_eq<i>{}; }
+
+template <int i>
+auto val() { return hana::test::ct_eq<-i>{}; }
+
+template <int i, int j>
+auto p() { return ::minimal_product(key<i>(), val<j>()); }
+
+int main() {
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(),
+            hana::make_map()
+        ),
+        hana::make_map()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>()),
+            hana::make_map()
+        ),
+        hana::make_map(p<1, 1>())
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>()),
+            hana::make_map(p<2, 2>())
+        ),
+        hana::make_map(p<1, 1>())
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>()),
+            hana::make_map(p<1, 2>())
+        ),
+        hana::make_map()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>(),
+                           p<2, 2>(),
+                           p<3, 3>()),
+            hana::make_map(p<2, 2>(),
+                           p<4, 4>())
+        ),
+        hana::make_map(p<1, 1>(),
+                       p<3, 3>())
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>(),
+                           p<2, 2>()),
+            hana::make_map(p<2, 3>(),
+                           p<1, 4>())
+        ),
+        hana::make_map()
+    ));
+
+    BOOST_HANA_CONSTANT_CHECK(hana::equal(
+        hana::difference(
+            hana::make_map(p<1, 1>(),
+                           p<2, 2>(),
+                           p<3, 3>(),
+                           p<4, 4>(),
+                           p<5, 5>(),
+                           p<6, 6>(),
+                           p<7, 7>(),
+                           p<8, 8>(),
+                           p<9, 9>(),
+                           p<10, 10>()),
+            hana::make_map(p<0, 2>(),
+                           p<2, 4>(),
+                           p<3, 6>(),
+                           p<4, 8>(),
+                           p<5, 10>(),
+                           p<20, 30>())
+        ),
+        hana::make_map(p<1, 1>(),
+                       p<6, 6>(),
+                       p<7, 7>(),
+                       p<8, 8>(),
+                       p<9, 9>(),
+                       p<10, 10>())
+    ));
+
+}