Merge pull request #11 from cstuncsik/master

Fixing #10

Author: luijar

src/ch06/tests.js

@@ -44,7 +44,7 @@ QUnit.test('showStudent: cleanInput', function (assert) {
 
 	const input = ['', '-44-44-', '44444', ' 4 ', ' 4-4 '];
 	const assertions = ['', '4444', '44444', '4', '44'];
-	expect(input.length);
+	assert.expect(input.length);
 	input.forEach(function (val, key) {
 		assert.equal(cleanInput(val), assertions[key]);
 	});

src/ch08/tests.js

@@ -65,6 +65,29 @@ QUnit.test("Generator 2", function (assert) {
     assert.equal(r.next().value, 2);
 });
 
+QUnit.test("Generator 3", function (assert) {
+  function range(start, end) {
+    return {
+      [Symbol.iterator]() {
+        return this;
+      },
+
+      next() {
+        if(start < end) {
+          return { value: start++, done:false };
+        }
+        return { done: true, value:end };
+      }
+    };
+  }
+
+  let res = [];
+  for(let num of range(0,5)) {
+    console.log(num);
+    res.push(num);
+  }
+  assert.deepEqual(res, [0,1,2,3,4]);
+});
 
 QUnit.test("Fetching student data with async calls", function (assert) {
 
@@ -89,35 +112,9 @@ QUnit.test("Fetching student data with async calls", function (assert) {
 		.catch(function (error) {
 			console.log('Error occurred: ' + error.message);
 		});	
-	expect(0); // when run this code prints to the screen all of the output through the IO monad, so nothing to expect
+	assert.expect(0); // when run this code prints to the screen all of the output through the IO monad, so nothing to expect
 });
 
-
-QUnit.test("Fetching student data with async calls", function (assert) {
-	function range(start, end) {
-		return {
-			[Symbol.iterator]() {
-				return this;
-			},
-			
-			next() {
-				if(start < end) {
-					return { value: start++, done:false };
-				}	
-			return { done: true, value:end };
-			}
-		};
-	}
-
-	let res = [];
-	for(let num of range(0,5)) {
-		console.log(num);
-		res.push(num);
-	}
-	assert.deepEqual(res, [0,1,2,3,4]);
-});
-
-
 QUnit.test("Rx test", function (assert) {
 
 	let res = [];

src/model/monad/IO.js

@@ -21,11 +21,8 @@ exports.IO = class IO {
     return new exports.IO(fn);
   }
 
-  map(fn) {    
-    var self = this;
-    return new exports.IO(function () {
-      return fn(self.effect());
-    });
+  map(fn) {
+    return new IO(() => fn(this.effect()));
   }
 
    chain(fn) {