cookrn · July 6, 2014 18:28 · Jul 6, 2014
diff --git a/example.rs b/example.rs
@@ -0,0 +1,72 @@
+use std::io::println;
+
+fn is_three(num: int) -> bool {
+  num % 3 == 0
+}
+
+fn is_five(num: int) -> bool {
+  num % 5 == 0
+}
+
+fn is_fifteen(num: int) -> bool {
+  num % 15 == 0
+}
+
+#[test]
+fn test_is_three_with_not_three() {
+  if is_three(1) {
+    fail!("One is not three");
+  }
+}
+
+#[test]
+fn test_is_three_with_three() {
+  if !is_three(3) {
+    fail!("Three should be three");
+  }
+}
+
+#[test]
+fn test_is_five_with_not_five() {
+  if is_five(1) {
+    fail!("One is not five");
+  }
+}
+
+#[test]
+fn test_is_five_with_five() {
+  if !is_five(5) {
+    fail!("Five should be five");
+  }
+}
+
+#[test]
+fn test_is_fifteen_with_not_fifteen() {
+  if is_fifteen(1) {
+    fail!("One is not fifteen");
+  }
+}
+
+#[test]
+fn test_is_fifteen_with_fifteen() {
+  if !is_fifteen(15) {
+    fail!("Fifteen should be fifteen");
+  }
+}
+
+fn main() {
+  for num in range(1i, 101) {
+    let answer =
+      if is_fifteen(num) {
+        "FizzBuzz".to_str()
+      } else if is_three(num) {
+        "Fizz".to_str()
+      } else if is_five(num) {
+        "Buzz".to_str()
+      } else {
+        num.to_str()
+      };
+
+    println(answer.as_slice());
+  }
+}
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