100 exercises to learn Rust

exercises/07_threads/02_static/src/lib.rs

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+// TODO: Given a static slice of integers, split the slice into two halves and
+//  sum each half in a separate thread.
+//  Do not allocate any additional memory!
+use std::thread;
+
+pub fn sum(slice: &'static [i32]) -> i32 {
+    todo!()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn empty() {
+        static ARRAY: [i32; 0] = [];
+        assert_eq!(sum(&ARRAY), 0);
+    }
+
+    #[test]
+    fn one() {
+        static ARRAY: [i32; 1] = [1];
+        assert_eq!(sum(&ARRAY), 1);
+    }
+
+    #[test]
+    fn five() {
+        static ARRAY: [i32; 5] = [1, 2, 3, 4, 5];
+        assert_eq!(sum(&ARRAY), 15);
+    }
+
+    #[test]
+    fn nine() {
+        static ARRAY: [i32; 9] = [1, 2, 3, 4, 5, 6, 7, 8, 9];
+        assert_eq!(sum(&ARRAY), 45);
+    }
+
+    #[test]
+    fn ten() {
+        static ARRAY: [i32; 10] = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+        assert_eq!(sum(&ARRAY), 55);
+    }
+}