Initial quiz from ggriffiniii

src/main.rs

@@ -0,0 +1,39 @@
+pub struct LinearScale {}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn linear_scale_test() {
+        let scale = LinearScale::new(0..=3, 100..=200);
+        assert_eq!(100, scale.output_for(0));
+        assert_eq!(133, scale.output_for(1));
+        assert_eq!(166, scale.output_for(2));
+        assert_eq!(200, scale.output_for(3));
+
+        let scale = LinearScale::new(0..=100, 100..=100);
+        assert_eq!(100, scale.output_for(0));
+        assert_eq!(100, scale.output_for(100));
+
+        let scale = LinearScale::new(0.0..=1.0, 100..=200);
+        assert_eq!(100, scale.output_for(0.0));
+        assert_eq!(150, scale.output_for(0.5));
+        assert_eq!(200, scale.output_for(1.0));
+
+        let scale = LinearScale::new(0..=100, 0.0..=1.0);
+        assert_eq!(0.0, scale.output_for(0));
+        assert_eq!(0.5, scale.output_for(50));
+        assert_eq!(1.0, scale.output_for(100));
+
+        let scale = LinearScale::new(100..=200, 0.0..=1.0);
+        assert_eq!(0.0, scale.output_for(100));
+        assert_eq!(0.5, scale.output_for(150));
+        assert_eq!(1.0, scale.output_for(200));
+
+        let scale = LinearScale::new(100..=150, 0.0..=0.5);
+        assert_eq!(0.0, scale.output_for(100));
+        assert_eq!(0.1, scale.output_for(110));
+        assert_eq!(0.5, scale.output_for(150));
+    }
+}