From 10d3576acefabc8db2a79b4b6f27856df27ea977 Mon Sep 17 00:00:00 2001
From: Nick Been <66799549+nickbeen@users.noreply.github.com>
Date: Fri, 24 Jan 2025 18:47:28 +0100
Subject: [PATCH 1/3] Fix division by zero error

---
 src/ProgressBar.php       |  2 +-
 tests/ProgressBarTest.php | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/ProgressBar.php b/src/ProgressBar.php
index 74114f7..aaac597 100644
--- a/src/ProgressBar.php
+++ b/src/ProgressBar.php
@@ -239,7 +239,7 @@ public function setProgress(int|float $progress): ProgressBar
             $this->setMaxProgress($progress);
         }
 
-        $this->progress = max(0, $progress);
+        $this->progress = max(1, $progress);
 
         $this->setPercentage();
 
diff --git a/tests/ProgressBarTest.php b/tests/ProgressBarTest.php
index 55f6516..1e6b192 100644
--- a/tests/ProgressBarTest.php
+++ b/tests/ProgressBarTest.php
@@ -148,4 +148,16 @@ public function it_cannot_set_incorrect_max_progress()
 
         $this->assertEquals(1, $progressBar->getMaxProgress());
     }
+
+    /**
+     * @test
+     */
+    public function it_can_gracefully_handle_zero_progress()
+    {
+        $progressBar = new ProgressBar(maxProgress: 0);
+
+        $progressBar->tick(0);
+
+        $this->assertEquals(100, $progressBar->getPercentage());
+    }
 }

From aebefdec417acdf11f3e3b6d537639b0ac367a50 Mon Sep 17 00:00:00 2001
From: Nick Been <66799549+nickbeen@users.noreply.github.com>
Date: Fri, 24 Jan 2025 20:36:19 +0100
Subject: [PATCH 2/3] Fix failing tests and correct percentage at zero progress

---
 src/ProgressBar.php       | 19 +++++++++++++++++--
 tests/ProgressBarTest.php |  2 ++
 2 files changed, 19 insertions(+), 2 deletions(-)

diff --git a/src/ProgressBar.php b/src/ProgressBar.php
index aaac597..a4ea96f 100644
--- a/src/ProgressBar.php
+++ b/src/ProgressBar.php
@@ -31,6 +31,12 @@ final class ProgressBar
     /** Time when progress bar starts displaying  */
     private int $startTime;
 
+    /**
+     * Indicator whether maxProgress was truly set as zero.
+     * MaxProgress must always be at least one to be displayed.
+     */
+    private bool $maxProgressIsZero = false;
+
     /**
      * Initialize and set progress and maxProgress when available.
      * Use separate setProgress() and setMaxProgress() methods when undetermined during initialization.
@@ -204,7 +210,7 @@ private function setEstimatedTime(): ProgressBar
         $this->estimatedTime = round(
             (
                 time() - $this->startTime
-            ) / $this->progress * ($this->maxProgress - $this->progress)
+            ) / max(1, $this->progress) * ($this->maxProgress - $this->progress)
         );
 
         return $this;
@@ -215,6 +221,10 @@ private function setEstimatedTime(): ProgressBar
      */
     public function setMaxProgress(int|float $maxProgress): ProgressBar
     {
+        if ($maxProgress == 0) {
+            $this->maxProgressIsZero = true;
+        }
+
         $this->maxProgress = max(1, $maxProgress);
 
         return $this;
@@ -239,7 +249,7 @@ public function setProgress(int|float $progress): ProgressBar
             $this->setMaxProgress($progress);
         }
 
-        $this->progress = max(1, $progress);
+        $this->progress = max(0, $progress);
 
         $this->setPercentage();
 
@@ -274,6 +284,11 @@ public function start(): void
      */
     public function tick(int $progress = 1): void
     {
+        if ($progress == 0 && $this->maxProgressIsZero) {
+            $this->finish();
+            return;
+        }
+
         $this->setProgress($this->progress + $progress)
             ->setEstimatedTime();
 
diff --git a/tests/ProgressBarTest.php b/tests/ProgressBarTest.php
index 1e6b192..90551ed 100644
--- a/tests/ProgressBarTest.php
+++ b/tests/ProgressBarTest.php
@@ -155,8 +155,10 @@ public function it_cannot_set_incorrect_max_progress()
     public function it_can_gracefully_handle_zero_progress()
     {
         $progressBar = new ProgressBar(maxProgress: 0);
+        $this->assertEquals(1, $progressBar->getMaxProgress());
 
         $progressBar->tick(0);
+        $this->assertEquals(1, $progressBar->getProgress());
 
         $this->assertEquals(100, $progressBar->getPercentage());
     }

From 014ae3f9ff7409747ea5890120c62e50796ec9a1 Mon Sep 17 00:00:00 2001
From: nickbeen <66799549+nickbeen@users.noreply.github.com>
Date: Fri, 24 Jan 2025 19:36:51 +0000
Subject: [PATCH 3/3] Apply php-cs-fixer changes

---
 src/ProgressBar.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ProgressBar.php b/src/ProgressBar.php
index a4ea96f..d4a1824 100644
--- a/src/ProgressBar.php
+++ b/src/ProgressBar.php
@@ -286,6 +286,7 @@ public function tick(int $progress = 1): void
     {
         if ($progress == 0 && $this->maxProgressIsZero) {
             $this->finish();
+
             return;
         }