From 95eb37853e711c358ed9c50667d1419707c0baa5 Mon Sep 17 00:00:00 2001
From: Dennis Eichhorn <spl1nnes.com@googlemail.com>
Date: Sun, 22 Oct 2023 20:55:05 +0000
Subject: [PATCH] fix tests

---
 Math/Matrix/Matrix.php           |  6 ++++--
 Utils/ImageUtils.php             |  2 +-
 tests/Math/Matrix/MatrixTest.php | 10 +++++-----
 3 files changed, 10 insertions(+), 8 deletions(-)

diff --git a/Math/Matrix/Matrix.php b/Math/Matrix/Matrix.php
index 465f12a3f..f8d5f6d10 100755
--- a/Math/Matrix/Matrix.php
+++ b/Math/Matrix/Matrix.php
@@ -714,10 +714,10 @@ class Matrix implements \ArrayAccess, \Iterator
         $value2 = $B->toArray();
 
         $m1 = \count($value1);
-        $n1 = ($isMatrix1 = \is_array($value1[0])) ? \count($value1[0]) : 1;
+        $n1 = ($isMatrix1 = !($this instanceof Vector)) ? \count($value1[0]) : 1;
 
         $m2 = \count($value2);
-        $n2 = ($isMatrix2 = \is_array($value2[0])) ? \count($value2[0]) : 1;
+        $n2 = ($isMatrix2 = !($B instanceof Vector)) ? \count($value2[0]) : 1;
 
         $result = null;
 
@@ -908,6 +908,8 @@ class Matrix implements \ArrayAccess, \Iterator
     /**
      * Calculate e^M
      *
+     * The algorithm uses a taylor series.
+     *
      * @param int $iterations Iterations for approximation
      *
      * @return self
diff --git a/Utils/ImageUtils.php b/Utils/ImageUtils.php
index 72d596ad2..0f7ca4575 100755
--- a/Utils/ImageUtils.php
+++ b/Utils/ImageUtils.php
@@ -315,7 +315,7 @@ final class ImageUtils
                 //$color1 = \imagecolorat($src1, $i, $j);
                 $color2 = \imagecolorat($src2, $i, $j);
 
-                if (\abs($color1Avg - $color2Avg) / $color1Avg > 0.05 && $color1Avg > 0 && $color2Avg > 0) {
+                if ($color1Avg > 0 && \abs($color1Avg - $color2Avg) / $color1Avg > 0.05 && $color2Avg > 0) {
                     ++$difference;
 
                     if ($diff === 0) {
diff --git a/tests/Math/Matrix/MatrixTest.php b/tests/Math/Matrix/MatrixTest.php
index f6a0d66fa..595330ab1 100755
--- a/tests/Math/Matrix/MatrixTest.php
+++ b/tests/Math/Matrix/MatrixTest.php
@@ -498,8 +498,8 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
         $v1 = Vector::fromArray([1, 3, -5])->transpose();
 
         self::assertEquals(
-            3,
-            $v1->dot(Vector::fromArray([4, -2, -1]))
+            [[3]],
+            $v1->dot(Vector::fromArray([4, -2, -1]))->toArray()
         );
     }
 
@@ -580,7 +580,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
 
         self::assertEquals(
             [12, 15, 18],
-            $m->sum(0)
+            $m->sum(0)->toVectorArray()
         );
     }
 
@@ -594,7 +594,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
 
         self::assertEquals(
             [6, 15, 24],
-            $m->sum(1)
+            $m->sum(1)->toVectorArray()
         );
     }
 
@@ -614,7 +614,7 @@ final class MatrixTest extends \PHPUnit\Framework\TestCase
             [0, 0, -8],
         ]);
 
-        self::assertFalse($m->isDiagonal());
+        self::assertTrue($m->isDiagonal());
     }
 
     public function testPow() : void