More tests.

Author: 5cript

interval_tree.hpp

@@ -146,7 +146,7 @@ namespace lib_interval_tree
         {
             if (overlaps(other))
                 return 0;
-            if (high_ < other.low)
+            if (high_ < other.low_)
                 return other.low_ - high_;
             else
                 return low_ - other.high_;

tests/interval_tests.hpp

@@ -21,6 +21,13 @@ class OverlapTests
 class ContainmentTests
     : public ::testing::Test
 {
+public:
+    using types = IntervalTypes <int>;
+};
+
+class DistanceTests
+    : public ::testing::Test
+{
 public:
     using types = IntervalTypes <int>;
 };
@@ -188,6 +195,7 @@ TEST_F(ContainmentTests, ExpectIntervalWithinOther)
     EXPECT_EQ(base.within({-73, -23}), true);
     EXPECT_EQ(base.within({-100, -100}), true);
     EXPECT_EQ(base.within({100, 100}), true);
+    EXPECT_EQ(base.within({0, 0}), true);
 }
 
 TEST_F(ContainmentTests, ExpectIntervalNotWithinOther)
@@ -200,3 +208,11 @@ TEST_F(ContainmentTests, ExpectIntervalNotWithinOther)
     EXPECT_EQ(base.within({-200, -101}), false);
     EXPECT_EQ(base.within({200, 300}), false);
 }
+
+TEST_F(DistanceTests, DistanceIsZeroOnOverlap)
+{
+    auto base = types::interval_type{-35, 96};
+
+    auto other = types::interval_type{-20, 600};
+    EXPECT_EQ(base - other, 0);
+}