Step 6 - test

__tests__/CDFunctor__Test.re

@@ -1,12 +1,35 @@
 open Jest;
 open Expect;
 
+exception ShapeWrong(string);
 describe("CDF", () => {
-  module CDF =
-    CDFunctor.Make({
-      let shape: DistributionTypes.xyShape =
-        CDFunctor.order({xs: [|1., 4., 8.|], ys: [|8., 9., 2.|]});
-    });
+  test("raise - w/o order", () => {
+    expect(() => {
+      module CDF =
+        CDFunctor.Make({
+          let shape: DistributionTypes.xyShape = {
+            xs: [|10., 4., 8.|],
+            ys: [|8., 9., 2.|],
+          };
+        });
+      ();
+    })
+    |> toThrow
+  });
+  test("raise - with order", () => {
+    expect(() => {
+      module CDF =
+        CDFunctor.Make({
+          let shape: DistributionTypes.xyShape = {
+            xs: [|1., 4., 8.|],
+            ys: [|8., 9., 2.|],
+          };
+        });
+      ();
+    })
+    |> not_
+    |> toThrow
+  });
   test("order#1", () => {
     let a = CDFunctor.order({xs: [|1., 4., 8.|], ys: [|8., 9., 2.|]});
     let b: DistributionTypes.xyShape = {

src/utility/lib/CDFunctor.re

@@ -23,4 +23,9 @@ module Make = (Config: Config) => {
   if (!validateSize()) {
     raise(ShapeWrong("Arrays of \"xs\" and \"ys\" have different sizes."));
   };
+  if (!Belt.SortArray.isSorted(Config.shape.xs, (a, b) => a > b ? 1 : (-1))) {
+    raise(ShapeWrong("Arrays of \"xs\" and \"ys\" have different sizes."));
+  };
+
+  1;
 };

src/utility/lib/continuousDistribution.js

@@ -3,6 +3,7 @@ const { interpolate, range, min, max } = require('./functions');
 
 class ContinuousDistribution {
   /**
+   * @Done
    * @param {number[]} xs
    * @param {number[]} ys
    */
@@ -20,6 +21,7 @@ class ContinuousDistribution {
   }
 
   /**
+   * @Done
    * Order them to make sure that xs are increasing
    * @param {number[]} xs
    * @param {number[]} ys