Add sum() method in FractionCollection

tazorax · Dec 11, 2018 · 4da9694 · 4da9694
1 parent f50326a
commit 4da9694
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diff --git a/src/Arithmetic/FractionCollection.php b/src/Arithmetic/FractionCollection.php
@@ -77,4 +77,22 @@ public function simplify()
 
         return $buffer;
     }
+
+    /**
+     * Get sum
+     *
+     * @return Fraction
+     */
+    public function sum()
+    {
+        $result = new Fraction();
+        $simplified_collection = $this->simplify();
+
+        foreach ($simplified_collection->fractions as $fraction) {
+            $result->numerator += $fraction->numerator;
+            $result->denominator = $fraction->denominator;
+        }
+
+        return $result;
+    }
 }
diff --git a/tests/Arithmetic/FractionCollectionTest.php b/tests/Arithmetic/FractionCollectionTest.php
@@ -61,4 +61,25 @@ public function testSimplify() {
 		$this->assertEquals([$f1, $f2, $f3, $f4, $f5], $fc2->fractions);
 
 	}
+
+    /**
+     *
+     */
+    public function testSum() {
+        $fc1 = new FractionCollection();
+
+        $fc1->addFraction(new Fraction(1, 2));
+        $fc1->addFraction(new Fraction(1, 4));
+        $fc1->addFraction(new Fraction(1, 8));
+        $fc1->addFraction(new Fraction(1, 8));
+        $fc1->addFraction(new Fraction(4, 256));
+
+        $this->assertEquals(5, count($fc1->fractions));
+
+        $expected_sum = new Fraction(65, 64);
+        $f = $fc1->sum();
+
+        $this->assertEquals($expected_sum, $f);
+
+    }
 }