From 19e067465a058ca9f40238cb3a928a1113531c9d Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 5 Oct 2017 15:23:25 +0200
Subject: Unary operators and division.

---
 test/libsolidity/SMTChecker.cpp | 85 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)

(limited to 'test')

diff --git a/test/libsolidity/SMTChecker.cpp b/test/libsolidity/SMTChecker.cpp
index 667d666b..7aa555e9 100644
--- a/test/libsolidity/SMTChecker.cpp
+++ b/test/libsolidity/SMTChecker.cpp
@@ -458,6 +458,91 @@ BOOST_AUTO_TEST_CASE(for_loop)
 	CHECK_WARNING(text, "Assertion violation");
 }
 
+BOOST_AUTO_TEST_CASE(division)
+{
+	string text = R"(
+		contract C {
+			function f(uint x, uint y) public pure returns (uint) {
+				return x / y;
+			}
+		}
+	)";
+	CHECK_WARNING(text, "Division by zero");
+	text = R"(
+		contract C {
+			function f(uint x, uint y) public pure returns (uint) {
+				require(y != 0);
+				return x / y;
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+	text = R"(
+		contract C {
+			function f(int x, int y) public pure returns (int) {
+				require(y != 0);
+				return x / y;
+			}
+		}
+	)";
+	CHECK_WARNING(text, "Overflow");
+	text = R"(
+		contract C {
+			function f(int x, int y) public pure returns (int) {
+				require(y != 0);
+				require(y != -1);
+				return x / y;
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+}
+
+BOOST_AUTO_TEST_CASE(division_truncates_correctly)
+{
+	string text = R"(
+		contract C {
+			function f(uint x, uint y) public pure {
+				x = 7;
+				y = 2;
+				assert(x / y == 3);
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+	text = R"(
+		contract C {
+			function f(int x, int y) public pure {
+				x = 7;
+				y = 2;
+				assert(x / y == 3);
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+	text = R"(
+		contract C {
+			function f(int x, int y) public pure {
+				x = -7;
+				y = 2;
+				assert(x / y == -3);
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+	text = R"(
+		contract C {
+			function f(int x, int y) public pure {
+				x = -7;
+				y = -2;
+				int r = x / y;
+				assert(r == 3);
+			}
+		}
+	)";
+	CHECK_SUCCESS_NO_WARNINGS(text);
+}
+
 BOOST_AUTO_TEST_SUITE_END()
 
 }
-- 
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