Merge pull request exercism#852 from CGMossa/patch-1

triangle: added tests for only one side being zero

exercises/triangle/tests/triangle.rs

@@ -15,6 +15,30 @@ fn zero_length_sides_are_illegal() {
     assert!(triangle.is_none());
 }
 
+#[test]
+#[ignore]
+fn one_length_zero_side_first() {
+    let sides = [0, 2, 2];
+    let triangle = Triangle::build(sides);
+    assert!(triangle.is_none());
+}
+
+#[test]
+#[ignore]
+fn one_length_zero_side_second() {
+    let sides = [2, 0, 2];
+    let triangle = Triangle::build(sides);
+    assert!(triangle.is_none());
+}
+
+#[test]
+#[ignore]
+fn one_length_zero_side_third() {
+    let sides = [2, 2, 0];
+    let triangle = Triangle::build(sides);
+    assert!(triangle.is_none());
+}
+
 #[test]
 #[ignore]
 fn equilateral_triangles_have_equal_sides() {