1 files changed, 24 insertions, 0 deletions
diff --git a/ds/integer_test.go b/ds/integer_test.go
new file mode 100644
index 0000000..9be55eb
--- /dev/null
+++ b/ds/integer_test.go
@@ -0,0 +1,24 @@
+package ds
+
+import "testing"
+
+func TestCompare(t *testing.T) {
+	i := Integer{1}
+	j := Integer{10}
+	res := i.Compare(j)
+	if res != -1 {
+		t.Errorf("%v must be lower than %v, but got %v", i, j, res)
+	}
+
+	res = j.Compare(i)
+	if res != 1 {
+		t.Errorf("%v must be higher than %v, but got %v", j, i, res)
+	}
+
+	i = Integer{2}
+	j = Integer{2}
+	res = i.Compare(j)
+	if res != 0 {
+		t.Errorf("%v must be equal to %v, but got %v", i, j, res)
+	}
+}