From 22cfb24b2786029b5b20eaa5c462d3ed1407a227 Mon Sep 17 00:00:00 2001
From: Saki Takamachi <saki@sakiot.com>
Date: Thu, 15 Feb 2024 22:55:25 +0900
Subject: [PATCH] Added tests to check operation with existing implementation

---
 .../round_gh12143_expand-rounding-target.phpt | 146 ++++++++++++++++++
 1 file changed, 146 insertions(+)
 create mode 100644 ext/standard/tests/math/round_gh12143_expand-rounding-target.phpt

diff --git a/ext/standard/tests/math/round_gh12143_expand-rounding-target.phpt b/ext/standard/tests/math/round_gh12143_expand-rounding-target.phpt
new file mode 100644
index 0000000000000..472d6a35f617d
--- /dev/null
+++ b/ext/standard/tests/math/round_gh12143_expand-rounding-target.phpt
@@ -0,0 +1,146 @@
+--TEST--
+Feature GH-12143: Extend the maximum precision round can handle by one digit
+--INI--
+serialize_precisiion=17
+--FILE--
+<?php
+
+$testCases = [
+    'PHP_ROUND_HALF_UP' => [
+        [0.12345678901234565, 16],
+        [-0.12345678901234565, 16],
+        [12345678901234565, -1],
+        [-12345678901234565, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_HALF_DOWN' => [
+        [0.12345678901234565, 16],
+        [-0.12345678901234565, 16],
+        [12345678901234565, -1],
+        [-12345678901234565, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_HALF_EVEN' => [
+        [0.12345678901234565, 16],
+        [-0.12345678901234565, 16],
+        [12345678901234565, -1],
+        [-12345678901234565, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_HALF_ODD' => [
+        [0.12345678901234565, 16],
+        [-0.12345678901234565, 16],
+        [12345678901234565, -1],
+        [-12345678901234565, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_AWAY_FROM_ZERO' => [
+        [0.12345678901234560, 16],
+        [-0.12345678901234560, 16],
+        [12345678901234567, -1],
+        [-12345678901234567, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_TOWARD_ZERO' => [
+        [0.12345678901234566, 16],
+        [-0.12345678901234566, 16],
+        [12345678901234565, -1],
+        [-12345678901234565, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_CEILING' => [
+        [0.12345678901234560, 16],
+        [-0.12345678901234560, 16],
+        [12345678901234564, -1],
+        [-12345678901234564, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+    'PHP_ROUND_FLOOR' => [
+        [0.12345678901234560, 16],
+        [-0.12345678901234560, 16],
+        [12345678901234564, -1],
+        [-12345678901234564, -1],
+        [4503599627370495.5, 0],
+        [-4503599627370495.5, 0],
+    ],
+];
+
+foreach ($testCases as $mode => $cases) {
+    echo "========== {$mode} ==========\n";
+    foreach ($cases as [$val, $precision]) {
+        var_dump(round($val, $precision, constant($mode)));
+    }
+    echo "\n";
+}
+?>
+--EXPECT--
+========== PHP_ROUND_HALF_UP ==========
+float(0.12345678901234565)
+float(-0.12345678901234565)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_HALF_DOWN ==========
+float(0.12345678901234565)
+float(-0.12345678901234565)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_HALF_EVEN ==========
+float(0.12345678901234565)
+float(-0.12345678901234565)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_HALF_ODD ==========
+float(0.12345678901234565)
+float(-0.12345678901234565)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_AWAY_FROM_ZERO ==========
+float(0.1234567890123456)
+float(-0.1234567890123456)
+float(12345678901234568)
+float(-12345678901234568)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_TOWARD_ZERO ==========
+float(0.12345678901234566)
+float(-0.12345678901234566)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_CEILING ==========
+float(0.1234567890123456)
+float(-0.1234567890123456)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)
+
+========== PHP_ROUND_FLOOR ==========
+float(0.1234567890123456)
+float(-0.1234567890123456)
+float(12345678901234564)
+float(-12345678901234564)
+float(4503599627370495.5)
+float(-4503599627370495.5)