From 0f326725722743a4a003f1125c82f12787272bf8 Mon Sep 17 00:00:00 2001
From: Igor Pashev <pashev.igor@gmail.com>
Date: Wed, 16 Oct 2019 18:56:52 +0200
Subject: Add some tests

---
 src/lib.rs | 90 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index 9da8631..8108634 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -5,6 +5,96 @@ use std::collections::LinkedList;
 use chrono::NaiveDate;
 use chrono::Duration;
 
+#[cfg(test)]
+mod tests {
+
+    use std::collections::LinkedList;
+    use chrono::NaiveDate;
+
+    use super::partition;
+    use super::partition_days;
+
+    macro_rules! list {
+        ( $( $x:expr ),* ) => {
+            {
+                let mut temp_list = LinkedList::new();
+                $(
+                    temp_list.push_back($x);
+                )*
+                temp_list
+            }
+        };
+    }
+
+    #[test]
+    fn all_const1() {
+        let ins = vec![1, 2, 3, 4, 5, 6, 7, 8, 9];
+        let outs = list![list![1], list![2], list![3],
+                         list![4], list![5], list![6],
+                         list![7], list![8], list![9]];
+
+        assert_eq!(partition(&|_n| 1, &ins), outs);
+    }
+
+    #[test]
+    fn all_const2() {
+        let ins = vec![1, 2, 3, 4, 5, 6, 7, 8, 9];
+        let outs = list![list![1, 2], list![3, 4],
+                         list![5, 6], list![7, 8], list![9]];
+
+        assert_eq!(partition(&|_n| 2, &ins), outs);
+    }
+
+    #[test]
+    fn odds_const1() {
+        let ins = vec![1, 3, 5, 7, 9, 11, 13, 15];
+        let outs = list![list![1], list![], list![3], list![],
+                         list![5], list![], list![7], list![],
+                         list![9], list![], list![11], list![],
+                         list![13], list![], list![15]];
+
+        assert_eq!(partition(&|_n| 1, &ins), outs);
+    }
+
+    #[test]
+    fn odds_const2() {
+        let ins = vec![1, 3, 5, 7, 9, 11, 13, 15];
+        let outs = list![list![1], list![3], list![5],
+                         list![7], list![9], list![11],
+                         list![13], list![15]];
+
+        assert_eq!(partition(&|_n| 2, &ins), outs);
+    }
+
+    fn exp2(n: u32) -> i64 {
+        let i: i32 = n as i32 - 1;
+        2_f32.powi(i).ceil() as i64
+    }
+
+    #[test]
+    fn all_exp2() {
+        let ins = vec![1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13];
+        let outs = list![list![1], list![2, 3], list![4, 5, 6, 7],
+                         list![8, 9, 10, 11, 12, 13]];
+
+        assert_eq!(partition(&exp2, &ins), outs);
+    }
+
+    #[test]
+    fn dates_exp2() {
+        let d = NaiveDate::from_ymd;
+        let ins = vec![d(2019, 08, 30), d(2019, 08, 31),
+                       d(2019, 09, 01), d(2019, 09, 02),
+                       d(2019, 09, 03), d(2019, 09, 04)];
+        let outs = list![list![d(2019, 09, 04)],
+                         list![d(2019, 09, 02), d(2019, 09, 03)],
+                         list![d(2019, 08, 30), d(2019, 08, 31), d(2019, 09, 01)]];
+
+        assert_eq!(partition_days(&exp2, &ins), outs);
+    }
+}
+
+
 pub fn partition(f: &Fn(u32) -> i64, v: &Vec<i64>) -> LinkedList<LinkedList<i64>> {
     let mut term: LinkedList<i64> = LinkedList::new();
     let mut res: LinkedList<LinkedList<i64>> = LinkedList::new();
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