From b439136ed5bdfc2abc1bbda8bd5922854c959a1f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michael=20Vo=C5=99=C3=AD=C5=A1ek?= <mvorisek@mvorisek.cz>
Date: Wed, 14 Sep 2022 15:50:39 +0200
Subject: [PATCH] Drop comparison /w `PHP_FLOAT_EPSILON`

---
 src/Framework/Constraint/IsIdentical.php | 13 +------------
 tests/unit/Framework/AssertTest.php      | 22 +++++++++++++++++++---
 2 files changed, 20 insertions(+), 15 deletions(-)

diff --git a/src/Framework/Constraint/IsIdentical.php b/src/Framework/Constraint/IsIdentical.php
index b4beac3c9ec..99ab65848f0 100644
--- a/src/Framework/Constraint/IsIdentical.php
+++ b/src/Framework/Constraint/IsIdentical.php
@@ -9,13 +9,8 @@
  */
 namespace PHPUnit\Framework\Constraint;
 
-use const PHP_FLOAT_EPSILON;
-use function abs;
 use function get_class;
 use function is_array;
-use function is_float;
-use function is_infinite;
-use function is_nan;
 use function is_object;
 use function is_string;
 use function sprintf;
@@ -60,13 +55,7 @@ public function __construct($value)
      */
     public function evaluate($other, string $description = '', bool $returnResult = false)
     {
-        if (is_float($this->value) && is_float($other) &&
-            !is_infinite($this->value) && !is_infinite($other) &&
-            !is_nan($this->value) && !is_nan($other)) {
-            $success = abs($this->value - $other) < PHP_FLOAT_EPSILON;
-        } else {
-            $success = $this->value === $other;
-        }
+        $success = $this->value === $other;
 
         if ($returnResult) {
             return $success;
diff --git a/tests/unit/Framework/AssertTest.php b/tests/unit/Framework/AssertTest.php
index 51d0cdd2855..f51975c3ead 100644
--- a/tests/unit/Framework/AssertTest.php
+++ b/tests/unit/Framework/AssertTest.php
@@ -2418,9 +2418,15 @@ protected function sameValues(): array
             // integers
             [0, 0],
             // floats
+            [1.0, 1.0],
             [2.3, 2.3],
-            [1 / 3, 1 - 2 / 3],
+            [1 / 3, 1 / 3],
+            [1 - 2 / 3, 1 - 2 / 3],
+            [5.5E+123, 5.5E+123],
+            [5.5E-123, 5.5E-123],
             [log(0), log(0)],
+            [INF, INF],
+            [-INF, -INF],
             // arrays
             [[], []],
             [[0 => 1], [0 => 1]],
@@ -2474,6 +2480,12 @@ protected function notEqualValues(): array
             [[[2.3]], [[4.2]], 0.5],
             [new Struct(2.3), new Struct(4.2), 0.5],
             [[new Struct(2.3)], [new Struct(4.2)], 0.5],
+            [1 / 3, 1 - 2 / 3],
+            [1 / 3, '0.33333333333333337'],
+            [1 - 2 / 3, '3333333333333333'],
+            [5.5E+123, 5.6E+123],
+            [5.5E-123, 5.6E-123],
+            [5.5E+123, 5.5E-123],
             // NAN
             [NAN, NAN],
             // arrays
@@ -2648,8 +2660,12 @@ protected function equalValues(): array
             ['0', 0],
             [2.3, '2.3'],
             ['2.3', 2.3],
-            [(string) (1 / 3), 1 - 2 / 3],
-            [1 / 3, (string) (1 - 2 / 3)],
+            [1, 1.0],
+            [1.0, '1'],
+            [1 / 3, '0.3333333333333333'],
+            [1 - 2 / 3, '0.33333333333333337'],
+            [5.5E+123, '5.5E+123'],
+            [5.5E-123, '5.5E-123'],
             ['string representation', new ClassWithToString],
             [new ClassWithToString, 'string representation'],
         ];