From aedde6637c30c9c2dc22b1978bd5a692d5ff5def Mon Sep 17 00:00:00 2001
From: a14m <a14m@pm.me>
Date: Mon, 5 Apr 2021 23:02:43 +0200
Subject: Add populate function w/testing

---
 CLI/rust/src/game_of_life/generators/input.rs | 80 +++++++++++++++++++++++++++
 1 file changed, 80 insertions(+)

(limited to 'CLI')

diff --git a/CLI/rust/src/game_of_life/generators/input.rs b/CLI/rust/src/game_of_life/generators/input.rs
index e22a9fc..235b3b2 100644
--- a/CLI/rust/src/game_of_life/generators/input.rs
+++ b/CLI/rust/src/game_of_life/generators/input.rs
@@ -133,3 +133,83 @@ mod generate_file_data {
 fn generate_url_data(_opts: Opts) -> Result<Universe, Error> {
     unimplemented!()
 }
+
+/// Return a universe struct with populated data from the data param
+///
+/// The data param is reshaped to fit with the opts width/height (extended or shrinked)
+fn populate(opts: Opts, data: Vec<Vec<bool>>) -> Universe {
+    let (width, height) = (opts.width as usize, opts.height as usize);
+    let mut current = vec![vec![false; width]; height];
+
+    for i in 0..height {
+        for j in 0..width {
+            current[i][j] = data
+                .get(i)
+                .unwrap_or(&vec![])
+                .get(j)
+                .unwrap_or(&false)
+                .clone();
+        }
+    }
+
+    Universe {
+        opts,
+        current,
+        future: vec![vec![false; width]; height],
+    }
+}
+
+#[cfg(test)]
+mod populate {
+    use super::*;
+
+    fn opts(width: isize, height: isize) -> Opts {
+        Opts {
+            width,
+            height,
+            seed: 1337,
+            input: None,
+            live_cell: 'L',
+            dead_cell: 'D',
+            delay: 13,
+        }
+    }
+
+    #[test]
+    fn expand_data() {
+        let data = vec![vec![true, false, true]; 3];
+        let opts = opts(5, 5);
+
+        let universe = populate(opts.clone(), data);
+        assert_eq!(
+            universe,
+            Universe {
+                opts,
+                future: vec![vec![false; 5]; 5],
+                current: vec![
+                    vec![true, false, true, false, false],
+                    vec![true, false, true, false, false],
+                    vec![true, false, true, false, false],
+                    vec![false, false, false, false, false],
+                    vec![false, false, false, false, false],
+                ]
+            }
+        )
+    }
+
+    #[test]
+    fn shrink_data() {
+        let data = vec![vec![true, false, true]; 3];
+        let opts = opts(2, 2);
+
+        let universe = populate(opts.clone(), data);
+        assert_eq!(
+            universe,
+            Universe {
+                opts,
+                future: vec![vec![false; 2]; 2],
+                current: vec![vec![true, false], vec![true, false]]
+            }
+        )
+    }
+}
-- 
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