Add tests for `concatenate`

tests/macros.rs

@@ -0,0 +1,52 @@
+#[macro_use] extern crate average;
+
+extern crate core;
+
+#[test]
+fn concatenate_simple() {
+    use average::{Min, Max};
+
+    concatenate!(MinMax, [Min, min], [Max, max]);
+
+    {
+        let mut s = MinMax::new();
+        for i in 1..6 {
+            s.add(i as f64);
+        }
+
+        assert_eq!(s.min(), 1.0);
+        assert_eq!(s.max(), 5.0);
+    }
+
+    {
+        let mut s = MinMax::default();
+        for i in 1..6 {
+            s.add(i as f64);
+        }
+
+        assert_eq!(s.min(), 1.0);
+        assert_eq!(s.max(), 5.0);
+    }
+
+    {
+        let s: MinMax = (1..6).map(Into::into).collect();
+
+        assert_eq!(s.min(), 1.0);
+        assert_eq!(s.max(), 5.0);
+    }
+}
+
+#[test]
+fn concatenate_moments() {
+    use average::{Variance, Quantile};
+
+    concatenate!(Estimator,
+        [Variance, variance, mean, sample_variance],
+        [Quantile, quantile, quantile]);
+
+    let e: Estimator = (1..6).map(Into::into).collect();
+
+    assert_eq!(e.mean(), 3.0);
+    assert_eq!(e.sample_variance(), 2.5);
+    assert_eq!(e.quantile(), 3.0);
+}