[rust] Sum of Multiples

1 files changed, 81 insertions, 0 deletions

diff --git a/sum-of-multiples/tests/sum-of-multiples.rs b/sum-of-multiples/tests/sum-of-multiples.rs
new file mode 100644
index 0000000..369289c
--- /dev/null
+++ b/sum-of-multiples/tests/sum-of-multiples.rs
@@ -0,0 +1,81 @@
+use sum_of_multiples::*;
+
+#[test]
+fn no_multiples_within_limit() {
+    assert_eq!(0, sum_of_multiples(1, &[3, 5]))
+}
+
+#[test]
+fn one_factor_has_multiples_within_limit() {
+    assert_eq!(3, sum_of_multiples(4, &[3, 5]))
+}
+
+#[test]
+fn more_than_one_multiple_within_limit() {
+    assert_eq!(9, sum_of_multiples(7, &[3]))
+}
+
+#[test]
+fn more_than_one_factor_with_multiples_within_limit() {
+    assert_eq!(23, sum_of_multiples(10, &[3, 5]))
+}
+
+#[test]
+fn each_multiple_is_only_counted_once() {
+    assert_eq!(2318, sum_of_multiples(100, &[3, 5]))
+}
+
+#[test]
+fn a_much_larger_limit() {
+    assert_eq!(233_168, sum_of_multiples(1000, &[3, 5]))
+}
+
+#[test]
+fn three_factors() {
+    assert_eq!(51, sum_of_multiples(20, &[7, 13, 17]))
+}
+
+#[test]
+fn factors_not_relatively_prime() {
+    assert_eq!(30, sum_of_multiples(15, &[4, 6]))
+}
+
+#[test]
+fn some_pairs_of_factors_relatively_prime_and_some_not() {
+    assert_eq!(4419, sum_of_multiples(150, &[5, 6, 8]))
+}
+
+#[test]
+fn one_factor_is_a_multiple_of_another() {
+    assert_eq!(275, sum_of_multiples(51, &[5, 25]))
+}
+
+#[test]
+fn much_larger_factors() {
+    assert_eq!(2_203_160, sum_of_multiples(10_000, &[43, 47]))
+}
+
+#[test]
+fn all_numbers_are_multiples_of_1() {
+    assert_eq!(4950, sum_of_multiples(100, &[1]))
+}
+
+#[test]
+fn no_factors_means_an_empty_sum() {
+    assert_eq!(0, sum_of_multiples(10_000, &[]))
+}
+
+#[test]
+fn the_only_multiple_of_0_is_0() {
+    assert_eq!(0, sum_of_multiples(1, &[0]))
+}
+
+#[test]
+fn the_factor_0_does_not_affect_the_sum_of_multiples_of_other_factors() {
+    assert_eq!(3, sum_of_multiples(4, &[3, 0]))
+}
+
+#[test]
+fn solutions_using_include_exclude_must_extend_to_cardinality_greater_than_3() {
+    assert_eq!(39_614_537, sum_of_multiples(10_000, &[2, 3, 5, 7, 11]))
+}