Fix strftime directives handling and tighten test assertions

- Remove incorrect %C mapping (was mapping century to full year)
- Add special handling for %C (century), %c (datetime), %n (newline), %t (tab), %x (date)
- Add %h mapping (same as %b for abbreviated month)
- Tighten edge-case test assertions to use assertSame/assertMatchesRegularExpression
- Add tests for new directives: %C, %c, %n, %t, %x, %h

Dockerfile.test

@@ -0,0 +1,3 @@
+FROM php:8.4-cli
+RUN apt-get update && apt-get install -y libicu-dev && docker-php-ext-install intl
+WORKDIR /app

app/Libraries/Token_lib.php

@@ -23,6 +23,7 @@ class Token_lib
         '%D' => 'MM/dd/yy',
         '%e' => 'd',
         '%F' => 'yyyy-MM-dd',
+        '%h' => 'MMM',
         '%j' => 'D',
         '%m' => 'MM',
         '%U' => 'w',
@@ -43,7 +44,6 @@ class Token_lib
         '%X' => 'HH:mm:ss',
         '%z' => 'ZZZZZ',
         '%Z' => 'z',
-        '%C' => 'yyyy',
         '%g' => 'yy',
         '%G' => 'yyyy',
         '%u' => 'e',
@@ -51,7 +51,7 @@ class Token_lib
     ];
 
     private array $validStrftimeFormats = [
-        'a', 'A', 'b', 'B', 'c', 'C', 'd', 'D', 'e', 'F', 'g', 'G',
+        'a', 'A', 'b', 'B', 'c', 'd', 'D', 'e', 'F', 'g', 'G',
         'h', 'H', 'I', 'j', 'm', 'M', 'n', 'p', 'P', 'r', 'R',
         'S', 't', 'T', 'u', 'U', 'V', 'w', 'W', 'x', 'X', 'y', 'Y', 'z', 'Z'
     ];
@@ -92,19 +92,39 @@ class Token_lib
         $dateTime = new DateTime();
 
         return preg_replace_callback(
-            '/%([a-zA-Z%]|%%)?/',
+            '/%([a-zA-Z%])/',
             function ($match) use ($formatter, $dateTime) {
-                if ($match[0] === '%%') {
-                    return '%';
-                }
+                $formatChar = $match[1];
 
-                $formatChar = $match[1] ?? '';
-                
                 if ($formatChar === '%') {
                     return '%';
                 }
 
-                if ($formatChar === '' || !in_array($formatChar, $this->validStrftimeFormats, true)) {
+                if ($formatChar === 'n') {
+                    return "\n";
+                }
+
+                if ($formatChar === 't') {
+                    return "\t";
+                }
+
+                if ($formatChar === 'C') {
+                    return str_pad((string) intdiv((int) $dateTime->format('Y'), 100), 2, '0', STR_PAD_LEFT);
+                }
+
+                if ($formatChar === 'c') {
+                    $formatter->setPattern('yyyy-MM-dd HH:mm:ss');
+                    $result = $formatter->format($dateTime);
+                    return $result !== false ? $result : $match[0];
+                }
+
+                if ($formatChar === 'x') {
+                    $formatter->setPattern('yyyy-MM-dd');
+                    $result = $formatter->format($dateTime);
+                    return $result !== false ? $result : $match[0];
+                }
+
+                if (!in_array($formatChar, $this->validStrftimeFormats, true)) {
                     return $match[0];
                 }
 

build/.phpunit.cache/test-results

@@ -0,0 +1 @@
+{"version":2,"defects":{"Token_libTest::testRenderHandlesSpecialCharacters":8,"Token_libTest::testRenderHandlesUnicode":8,"Token_libTest::testRenderHandlesNewLines":8,"Token_libTest::testRenderHandlesTabs":8,"Token_libTest::testRenderHandlesDateAtStart":8,"Token_libTest::testRenderHandlesSqlInjectionAttempt":8,"Token_libTest::testRenderHandlesVeryLongStringWithDate":8,"Token_libTest::testRenderHandlesMultipleDates":8,"Token_libTest::testRenderDoesNotReplaceInvalidFormatSpecifiers":7},"times":{"Token_libTest::testRenderReturnsInputStringWhenNoTokens":0.002,"Token_libTest::testRenderHandlesStringWithPercentNotInDateFormat":0.004,"Token_libTest::testRenderHandlesInvalidDateFormatPercentDashPercent":0.001,"Token_libTest::testRenderHandlesInvalidDateFormatPercentYPercentQPercentBad":0,"Token_libTest::testRenderHandlesStringWithPercentAPercent":0,"Token_libTest::testRenderHandlesExtremelyLongString":0,"Token_libTest::testRenderHandlesStringWithMultiplePercentSymbols":0,"Token_libTest::testRenderHandlesStringWithOnlyPercentSymbol":0,"Token_libTest::testRenderPreservesTextWithValidDateTokensAndNoOtherTokens":0,"Token_libTest::testRenderHandlesEmptyString":0,"Token_libTest::testScanExtractsTokens":0,"Token_libTest::testScanExtractsTokensWithLength":0,"Token_libTest::testScanReturnsEmptyArrayForNoTokens":0,"Token_libTest::testRenderHandlesConsecutivePercentSigns":0,"Token_libTest::testRenderHandlesEscapedPercentSigns":0,"Token_libTest::testRenderHandlesSpecialCharacters":0.005,"Token_libTest::testRenderHandlesUnicode":0,"Token_libTest::testRenderHandlesNewLines":0,"Token_libTest::testRenderHandlesTabs":0,"Token_libTest::testRenderHandlesUnclosedBraces":0,"Token_libTest::testRenderHandlesUnopenedBraces":0,"Token_libTest::testRenderHandlesDateAtStart":0,"Token_libTest::testRenderHandlesSqlInjectionAttempt":0,"Token_libTest::testRenderHandlesVeryLongStringWithDate":0,"Token_libTest::testRenderHandlesMultipleDates":0,"Token_libTest::testRenderHandlesValidYearFormat":0,"Token_libTest::testRenderHandlesValidMonthFormat":0,"Token_libTest::testRenderHandlesValidDayFormat":0,"Token_libTest::testRenderHandlesFullDateFormat":0,"Token_libTest::testRenderHandlesPercentB":0,"Token_libTest::testRenderHandlesPercentA":0,"Token_libTest::testRenderHandlesComplexPercentFormat":0,"Token_libTest::testRenderDoesNotReplaceInvalidFormatSpecifiers":0,"Token_libTest::testScanWorksWithMixedContent":0,"Token_libTest::testRenderReplacesTimezoneFormat":0,"Tests\\Libraries\\Token_libTest::testRenderReturnsInputStringWhenNoTokens":0.001,"Tests\\Libraries\\Token_libTest::testRenderHandlesStringWithPercentNotInDateFormat":0.004,"Tests\\Libraries\\Token_libTest::testRenderHandlesInvalidDateFormatPercentDashPercent":0.001,"Tests\\Libraries\\Token_libTest::testRenderHandlesInvalidDateFormatPercentYPercentQPercentBad":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesStringWithPercentAPercent":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesExtremelyLongString":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesStringWithMultiplePercentSymbols":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesStringWithOnlyPercentSymbol":0,"Tests\\Libraries\\Token_libTest::testRenderPreservesTextWithValidDateTokensAndNoOtherTokens":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesEmptyString":0,"Tests\\Libraries\\Token_libTest::testScanExtractsTokens":0,"Tests\\Libraries\\Token_libTest::testScanExtractsTokensWithLength":0,"Tests\\Libraries\\Token_libTest::testScanReturnsEmptyArrayForNoTokens":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesConsecutivePercentSigns":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesEscapedPercentSigns":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesUnclosedBraces":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesUnopenedBraces":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesVeryLongStringWithDate":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesMultipleDates":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesValidYearFormat":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesValidMonthFormat":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesValidDayFormat":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesFullDateFormat":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesPercentB":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesPercentA":0,"Tests\\Libraries\\Token_libTest::testRenderHandlesComplexPercentFormat":0,"Tests\\Libraries\\Token_libTest::testRenderDoesNotReplaceInvalidFormatSpecifiers":0,"Tests\\Libraries\\Token_libTest::testRenderReplacesTimezoneFormat":0,"Tests\\Libraries\\Token_libTest::testScanWorksWithMixedContent":0}}

build/logs/logfile.xml

@@ -0,0 +1,38 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<testsuites>
+  <testsuite name="/app/phpunit.xml.dist" tests="29" assertions="44" errors="0" failures="0" skipped="0" time="0.029097">
+    <testsuite name="App" tests="29" assertions="44" errors="0" failures="0" skipped="0" time="0.029097">
+      <testsuite name="Tests\Libraries\Token_libTest" file="/app/tests/Libraries/Token_libTest.php" tests="29" assertions="44" errors="0" failures="0" skipped="0" time="0.029097">
+        <testcase name="testRenderReturnsInputStringWhenNoTokens" file="/app/tests/Libraries/Token_libTest.php" line="18" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.007667"/>
+        <testcase name="testRenderHandlesStringWithPercentNotInDateFormat" file="/app/tests/Libraries/Token_libTest.php" line="25" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.004001"/>
+        <testcase name="testRenderHandlesInvalidDateFormatPercentDashPercent" file="/app/tests/Libraries/Token_libTest.php" line="33" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.001162"/>
+        <testcase name="testRenderHandlesInvalidDateFormatPercentYPercentQPercentBad" file="/app/tests/Libraries/Token_libTest.php" line="41" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000766"/>
+        <testcase name="testRenderHandlesStringWithPercentAPercent" file="/app/tests/Libraries/Token_libTest.php" line="48" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000613"/>
+        <testcase name="testRenderHandlesExtremelyLongString" file="/app/tests/Libraries/Token_libTest.php" line="55" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000513"/>
+        <testcase name="testRenderHandlesStringWithMultiplePercentSymbols" file="/app/tests/Libraries/Token_libTest.php" line="62" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000589"/>
+        <testcase name="testRenderHandlesStringWithOnlyPercentSymbol" file="/app/tests/Libraries/Token_libTest.php" line="70" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000578"/>
+        <testcase name="testRenderPreservesTextWithValidDateTokensAndNoOtherTokens" file="/app/tests/Libraries/Token_libTest.php" line="77" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000612"/>
+        <testcase name="testRenderHandlesEmptyString" file="/app/tests/Libraries/Token_libTest.php" line="84" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000503"/>
+        <testcase name="testScanExtractsTokens" file="/app/tests/Libraries/Token_libTest.php" line="91" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000578"/>
+        <testcase name="testScanExtractsTokensWithLength" file="/app/tests/Libraries/Token_libTest.php" line="98" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000501"/>
+        <testcase name="testScanReturnsEmptyArrayForNoTokens" file="/app/tests/Libraries/Token_libTest.php" line="105" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000513"/>
+        <testcase name="testRenderHandlesConsecutivePercentSigns" file="/app/tests/Libraries/Token_libTest.php" line="111" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000628"/>
+        <testcase name="testRenderHandlesEscapedPercentSigns" file="/app/tests/Libraries/Token_libTest.php" line="119" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000626"/>
+        <testcase name="testRenderHandlesUnclosedBraces" file="/app/tests/Libraries/Token_libTest.php" line="126" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000617"/>
+        <testcase name="testRenderHandlesUnopenedBraces" file="/app/tests/Libraries/Token_libTest.php" line="133" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000620"/>
+        <testcase name="testRenderHandlesVeryLongStringWithDate" file="/app/tests/Libraries/Token_libTest.php" line="140" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000599"/>
+        <testcase name="testRenderHandlesMultipleDates" file="/app/tests/Libraries/Token_libTest.php" line="148" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000593"/>
+        <testcase name="testRenderHandlesValidYearFormat" file="/app/tests/Libraries/Token_libTest.php" line="155" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000688"/>
+        <testcase name="testRenderHandlesValidMonthFormat" file="/app/tests/Libraries/Token_libTest.php" line="162" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000611"/>
+        <testcase name="testRenderHandlesValidDayFormat" file="/app/tests/Libraries/Token_libTest.php" line="169" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000627"/>
+        <testcase name="testRenderHandlesFullDateFormat" file="/app/tests/Libraries/Token_libTest.php" line="176" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="1" time="0.000757"/>
+        <testcase name="testRenderHandlesPercentB" file="/app/tests/Libraries/Token_libTest.php" line="183" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="3" time="0.000766"/>
+        <testcase name="testRenderHandlesPercentA" file="/app/tests/Libraries/Token_libTest.php" line="192" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="3" time="0.000703"/>
+        <testcase name="testRenderHandlesComplexPercentFormat" file="/app/tests/Libraries/Token_libTest.php" line="201" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000669"/>
+        <testcase name="testRenderDoesNotReplaceInvalidFormatSpecifiers" file="/app/tests/Libraries/Token_libTest.php" line="209" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000646"/>
+        <testcase name="testRenderReplacesTimezoneFormat" file="/app/tests/Libraries/Token_libTest.php" line="217" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000811"/>
+        <testcase name="testScanWorksWithMixedContent" file="/app/tests/Libraries/Token_libTest.php" line="225" class="Tests\Libraries\Token_libTest" classname="Tests.Libraries.Token_libTest" assertions="2" time="0.000540"/>
+      </testsuite>
+    </testsuite>
+  </testsuite>
+</testsuites>

build/logs/testdox.html

@@ -0,0 +1,87 @@
+<!doctype html>
+<html lang="en">
+    <head>
+        <meta charset="utf-8"/>
+        <title>Test Documentation</title>
+        <style>
+            body {
+                text-rendering: optimizeLegibility;
+                font-family: Source SansSerif Pro, Arial, sans-serif;
+                font-variant-ligatures: common-ligatures;
+                font-kerning: normal;
+                margin-left: 2rem;
+                background-color: #fff;
+                color: #000;
+            }
+
+            body > ul > li {
+                font-size: larger;
+            }
+
+            h2 {
+                font-size: larger;
+                text-decoration-line: underline;
+                text-decoration-thickness: 2px;
+                margin: 0;
+                padding: 0.5rem 0;
+            }
+
+            ul {
+                list-style: none;
+                margin: 0 0 2rem;
+                padding: 0 0 0 1rem;
+                text-indent: -1rem;
+            }
+
+            .success:before {
+                color: #4e9a06;
+                content: '✓';
+                padding-right: 0.5rem;
+            }
+
+            .defect {
+                color: #a40000;
+            }
+
+            .defect:before {
+                color: #a40000;
+                content: '✗';
+                padding-right: 0.5rem;
+            }
+        </style>
+    </head>
+    <body>
+        <h2>Token_lib (Tests\Libraries\Token_lib)</h2>
+        <ul>
+            <li class="success">Render returns input string when no tokens</li>
+            <li class="success">Render handles string with percent not in date format</li>
+            <li class="success">Render handles invalid date format percent dash percent</li>
+            <li class="success">Render handles invalid date format percent y percent q percent bad</li>
+            <li class="success">Render handles string with percent a percent</li>
+            <li class="success">Render handles extremely long string</li>
+            <li class="success">Render handles string with multiple percent symbols</li>
+            <li class="success">Render handles string with only percent symbol</li>
+            <li class="success">Render preserves text with valid date tokens and no other tokens</li>
+            <li class="success">Render handles empty string</li>
+            <li class="success">Scan extracts tokens</li>
+            <li class="success">Scan extracts tokens with length</li>
+            <li class="success">Scan returns empty array for no tokens</li>
+            <li class="success">Render handles consecutive percent signs</li>
+            <li class="success">Render handles escaped percent signs</li>
+            <li class="success">Render handles unclosed braces</li>
+            <li class="success">Render handles unopened braces</li>
+            <li class="success">Render handles very long string with date</li>
+            <li class="success">Render handles multiple dates</li>
+            <li class="success">Render handles valid year format</li>
+            <li class="success">Render handles valid month format</li>
+            <li class="success">Render handles valid day format</li>
+            <li class="success">Render handles full date format</li>
+            <li class="success">Render handles percent b</li>
+            <li class="success">Render handles percent a</li>
+            <li class="success">Render handles complex percent format</li>
+            <li class="success">Render does not replace invalid format specifiers</li>
+            <li class="success">Render replaces timezone format</li>
+            <li class="success">Scan works with mixed content</li>
+        </ul>
+    </body>
+</html>

build/logs/testdox.txt

@@ -0,0 +1,31 @@
+Token_lib (Tests\Libraries\Token_lib)
+ [x] Render returns input string when no tokens
+ [x] Render handles string with percent not in date format
+ [x] Render handles invalid date format percent dash percent
+ [x] Render handles invalid date format percent y percent q percent bad
+ [x] Render handles string with percent a percent
+ [x] Render handles extremely long string
+ [x] Render handles string with multiple percent symbols
+ [x] Render handles string with only percent symbol
+ [x] Render preserves text with valid date tokens and no other tokens
+ [x] Render handles empty string
+ [x] Scan extracts tokens
+ [x] Scan extracts tokens with length
+ [x] Scan returns empty array for no tokens
+ [x] Render handles consecutive percent signs
+ [x] Render handles escaped percent signs
+ [x] Render handles unclosed braces
+ [x] Render handles unopened braces
+ [x] Render handles very long string with date
+ [x] Render handles multiple dates
+ [x] Render handles valid year format
+ [x] Render handles valid month format
+ [x] Render handles valid day format
+ [x] Render handles full date format
+ [x] Render handles percent b
+ [x] Render handles percent a
+ [x] Render handles complex percent format
+ [x] Render does not replace invalid format specifiers
+ [x] Render replaces timezone format
+ [x] Scan works with mixed content
+

tests/Libraries/Token_libTest.php

@@ -34,22 +34,21 @@ class Token_libTest extends CIUnitTestCase
     {
         $input = '%-%-%';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
-        $this->assertNotEquals('', $result);
+        $this->assertSame('%-%-%', $result);
     }
 
     public function testRenderHandlesInvalidDateFormatPercentYPercentQPercentBad(): void
     {
         $input = '%Y-%q-%bad';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertMatchesRegularExpression('/\d{4}-%q-%bad/', $result);
     }
 
     public function testRenderHandlesStringWithPercentAPercent(): void
     {
         $input = '%a%';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertMatchesRegularExpression('/^[A-Za-z]{3}%$/', $result);
     }
 
     public function testRenderHandlesExtremelyLongString(): void
@@ -112,44 +111,42 @@ class Token_libTest extends CIUnitTestCase
     {
         $input = 'Progress: 100%% complete';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
-        $this->assertStringContainsString('complete', $result);
+        $this->assertSame('Progress: 100% complete', $result);
     }
 
     public function testRenderHandlesEscapedPercentSigns(): void
     {
         $input = 'Value: %%';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertSame('Value: %', $result);
     }
 
     public function testRenderHandlesUnclosedBraces(): void
     {
         $input = "Invoice {CO Date: %Y-%m-%d";
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertMatchesRegularExpression('/Invoice \{CO Date: \d{4}-\d{2}-\d{2}/', $result);
     }
 
     public function testRenderHandlesUnopenedBraces(): void
     {
         $input = "Invoice CO} Date: %Y-%m-%d";
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertMatchesRegularExpression('/Invoice CO\} Date: \d{4}-\d{2}-\d{2}/', $result);
     }
 
     public function testRenderHandlesVeryLongStringWithDate(): void
     {
         $input = str_repeat('buffer ', 500) . '%Y-%m-%d Invoice' . str_repeat('buffer ', 500);
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
-        $this->assertStringContainsString('buffer', $result);
+        $this->assertMatchesRegularExpression('/buffer.*\d{4}-\d{2}-\d{2} Invoice.*buffer/', $result);
     }
 
     public function testRenderHandlesMultipleDates(): void
     {
         $input = '%Y-%m-%d Invoice - %Y-%m-%d';
         $result = $this->tokenLib->render($input, [], false);
-        $this->assertNotEmpty($result);
+        $this->assertMatchesRegularExpression('/\d{4}-\d{2}-\d{2} Invoice - \d{4}-\d{2}-\d{2}/', $result);
     }
 
     public function testRenderHandlesValidYearFormat(): void
@@ -264,4 +261,54 @@ class Token_libTest extends CIUnitTestCase
         $this->assertStringNotContainsString('%R', $result);
         $this->assertMatchesRegularExpression('/Time: \d{2}:\d{2}/', $result);
     }
+
+    public function testRenderHandlesPercentC(): void
+    {
+        $input = 'Century: %C';
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertNotEmpty($result);
+        $this->assertStringNotContainsString('%C', $result);
+        $this->assertMatchesRegularExpression('/Century: \d{2}/', $result);
+    }
+
+    public function testRenderHandlesLowercasePercentC(): void
+    {
+        $input = 'DateTime: %c';
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertNotEmpty($result);
+        $this->assertStringNotContainsString('%c', $result);
+        $this->assertMatchesRegularExpression('/DateTime: \d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}/', $result);
+    }
+
+    public function testRenderHandlesPercentN(): void
+    {
+        $input = "Line1%nLine2";
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertSame("Line1\nLine2", $result);
+    }
+
+    public function testRenderHandlesLowercasePercentT(): void
+    {
+        $input = "Col1%tCol2";
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertSame("Col1\tCol2", $result);
+    }
+
+    public function testRenderHandlesPercentX(): void
+    {
+        $input = 'Date: %x';
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertNotEmpty($result);
+        $this->assertStringNotContainsString('%x', $result);
+        $this->assertMatchesRegularExpression('/Date: \d{4}-\d{2}-\d{2}/', $result);
+    }
+
+    public function testRenderHandlesPercentH(): void
+    {
+        $input = 'Month: %h';
+        $result = $this->tokenLib->render($input, [], false);
+        $this->assertNotEmpty($result);
+        $this->assertStringNotContainsString('%h', $result);
+        $this->assertMatchesRegularExpression('/Month: [A-Za-z]{3}/', $result);
+    }
 }