diff --git a/concordia/interval.cpp b/concordia/interval.cpp
index d23e395..ffee629 100644
--- a/concordia/interval.cpp
+++ b/concordia/interval.cpp
@@ -15,6 +15,10 @@ bool Interval::intersects(Interval & interval) {
              interval.getEnd() - 1  < _start);
 }
 
+bool Interval::contains(Interval & interval) {
+    return (_start <= interval.getStart() && _end >= interval.getEnd());
+}
+
 SUFFIX_MARKER_TYPE Interval::getLength() {
     return _end - _start;
 }
diff --git a/concordia/interval.hpp b/concordia/interval.hpp
index e77fb40..24e7e08 100644
--- a/concordia/interval.hpp
+++ b/concordia/interval.hpp
@@ -32,6 +32,12 @@ public:
     */
     bool intersects(Interval & interval);
 
+    /*! Checks if this interval contains another.
+      \param interval another interval
+      \returns true if this interval contains the other
+    */
+    bool contains(Interval & interval);
+
     /*! Getter for interval length.
       \returns end - start
     */
diff --git a/concordia/t/test_interval.cpp b/concordia/t/test_interval.cpp
index dd9f7b6..79f61de 100644
--- a/concordia/t/test_interval.cpp
+++ b/concordia/t/test_interval.cpp
@@ -68,4 +68,37 @@ BOOST_AUTO_TEST_CASE( IntervalIntersects8 )
     BOOST_CHECK(!interval2.intersects(interval1));
 }
 
+BOOST_AUTO_TEST_CASE( IntervalContains1 )
+{
+	Interval interval1(2,9);
+	Interval interval2(3,7);
+    BOOST_CHECK(interval1.contains(interval2));
+    BOOST_CHECK(!interval2.contains(interval1));
+}
+
+BOOST_AUTO_TEST_CASE( IntervalContains2 )
+{
+	Interval interval1(3,9);
+	Interval interval2(3,7);
+    BOOST_CHECK(interval1.contains(interval2));
+    BOOST_CHECK(!interval2.contains(interval1));
+}
+
+BOOST_AUTO_TEST_CASE( IntervalContains3 )
+{
+	Interval interval1(4,9);
+	Interval interval2(3,7);
+    BOOST_CHECK(!interval1.contains(interval2));
+    BOOST_CHECK(!interval2.contains(interval1));
+}
+
+BOOST_AUTO_TEST_CASE( IntervalContains4 )
+{
+	Interval interval1(2,9);
+	Interval interval2(3,17);
+    BOOST_CHECK(!interval1.contains(interval2));
+    BOOST_CHECK(!interval2.contains(interval1));
+}
+
+
 BOOST_AUTO_TEST_SUITE_END()