From d9b2dc3c6fe0c366b9a22b5b36321c0233c82f3a Mon Sep 17 00:00:00 2001
From: sc0Vu <alk03073135@gmail.com>
Date: Mon, 5 Mar 2018 16:41:55 +0800
Subject: [PATCH] Add fraction number string support.

---
 src/Utils.php           | 18 +++++++++++++++++-
 test/unit/UtilsTest.php | 37 +++++++++++++++++++++++++++++++++----
 2 files changed, 50 insertions(+), 5 deletions(-)

diff --git a/src/Utils.php b/src/Utils.php
index 0cbf3d4..c9b0777 100644
--- a/src/Utils.php
+++ b/src/Utils.php
@@ -453,7 +453,23 @@ class Utils
                 $number = str_replace('-', '', $number, $count);
                 $negative1 = new BigNumber(-1);
             }
-            $bn = new BigNumber($number);
+            if (strpos($number, '.') > 0) {
+                $comps = explode('.', $number);
+
+                if (count($comps) > 2) {
+                    throw new InvalidArgumentException('toBn number must be a valid number.');
+                }
+                $whole = $comps[0];
+                $fraction = $comps[1];
+
+                return [
+                    new BigNumber($whole),
+                    new BigNumber($fraction),
+                    isset($negative1) ? $negative1 : false
+                ];
+            } else {
+                $bn = new BigNumber($number);
+            }
 
             if (isset($negative1)) {
                 $bn = $bn->multiply($negative1);
diff --git a/test/unit/UtilsTest.php b/test/unit/UtilsTest.php
index 7673e5d..ae94fae 100644
--- a/test/unit/UtilsTest.php
+++ b/test/unit/UtilsTest.php
@@ -490,11 +490,40 @@ class UtilsTest extends TestCase
         $bn = Utils::toBn('-1');
         $this->assertEquals($bn->toString(), '-1');
 
-        // $bn = Utils::toBn('-0.1');
-        // $this->assertEquals($bn->toString(), '-0.1');
+        $bn = Utils::toBn('-0.1');
+        $this->assertEquals(count($bn), 3);
+        $this->assertEquals($bn[0]->toString(), '0');
+        $this->assertEquals($bn[1]->toString(), '1');
+        $this->assertEquals($bn[2]->toString(), '-1');
 
-        // $bn = Utils::toBn(-0.1);
-        // $this->assertEquals($bn->toString(), -0.1);
+        $bn = Utils::toBn(-0.1);
+        $this->assertEquals(count($bn), 3);
+        $this->assertEquals($bn[0]->toString(), '0');
+        $this->assertEquals($bn[1]->toString(), '1');
+        $this->assertEquals($bn[2]->toString(), '-1');
+
+        $bn = Utils::toBn('0.1');
+        $this->assertEquals(count($bn), 3);
+        $this->assertEquals($bn[0]->toString(), '0');
+        $this->assertEquals($bn[1]->toString(), '1');
+        $this->assertEquals($bn[2], false);
+
+        $bn = Utils::toBn('-1.69');
+        $this->assertEquals(count($bn), 3);
+        $this->assertEquals($bn[0]->toString(), '1');
+        $this->assertEquals($bn[1]->toString(), '69');
+        $this->assertEquals($bn[2]->toString(), '-1');
+
+        $bn = Utils::toBn(-1.69);
+        $this->assertEquals($bn[0]->toString(), '1');
+        $this->assertEquals($bn[1]->toString(), '69');
+        $this->assertEquals($bn[2]->toString(), '-1');
+
+        $bn = Utils::toBn('1.69');
+        $this->assertEquals(count($bn), 3);
+        $this->assertEquals($bn[0]->toString(), '1');
+        $this->assertEquals($bn[1]->toString(), '69');
+        $this->assertEquals($bn[2], false);
 
         $bn = Utils::toBn(new BigNumber(1));
         $this->assertEquals($bn->toString(), '1');