[rust] Armstrong Numbers

1 files changed, 46 insertions, 0 deletions

diff --git a/armstrong-numbers/tests/armstrong-numbers.rs b/armstrong-numbers/tests/armstrong-numbers.rs
new file mode 100644
index 0000000..9ac51d0
--- /dev/null
+++ b/armstrong-numbers/tests/armstrong-numbers.rs
@@ -0,0 +1,46 @@
+use armstrong_numbers::*;
+
+#[test]
+fn test_zero_is_an_armstrong_number() {
+    assert!(is_armstrong_number(0))
+}
+
+#[test]
+fn test_single_digit_numbers_are_armstrong_numbers() {
+    assert!(is_armstrong_number(5))
+}
+
+#[test]
+fn test_there_are_no_2_digit_armstrong_numbers() {
+    assert!(!is_armstrong_number(10))
+}
+
+#[test]
+fn test_three_digit_armstrong_number() {
+    assert!(is_armstrong_number(153))
+}
+
+#[test]
+fn test_three_digit_non_armstrong_number() {
+    assert!(!is_armstrong_number(100))
+}
+
+#[test]
+fn test_four_digit_armstrong_number() {
+    assert!(is_armstrong_number(9474))
+}
+
+#[test]
+fn test_four_digit_non_armstrong_number() {
+    assert!(!is_armstrong_number(9475))
+}
+
+#[test]
+fn test_seven_digit_armstrong_number() {
+    assert!(is_armstrong_number(9_926_315))
+}
+
+#[test]
+fn test_seven_digit_non_armstrong_number() {
+    assert!(!is_armstrong_number(9_926_316))
+}