test: Add tests for date_format

Author: DenverCoder1

tests/OptionsTest.php

@@ -181,4 +181,23 @@ public function testDateFormatDifferentYear(): void
         $formatted = formatDate("2000-04-12", "M j[, Y]");
         $this->assertEquals("Apr 12, 2000", $formatted);
     }
+
+    /**
+     * Test date formatter no brackets different year
+     */
+    public function testDateFormatNoBracketsDiffYear(): void
+    {
+        $formatted = formatDate("2000-04-12", "Y/m/d");
+        $this->assertEquals("2000/04/12", $formatted);
+    }
+
+    /**
+     * Test date formatter no brackets same year
+     */
+    public function testDateFormatNoBracketsSameYear(): void
+    {
+        $year = date("Y");
+        $formatted = formatDate("$year-04-12", "Y/m/d");
+        $this->assertEquals("$year/04/12", $formatted);
+    }
 }

tests/RenderTest.php

@@ -56,6 +56,20 @@ public function testErrorCardRender(): void
         $this->assertEquals($expected, $render);
     }
 
+    /**
+     * Test date_format parameter in render
+     */
+    public function testDateFormatRender(): void
+    {
+        $year = date("Y");
+        $this->testStats["currentStreak"]["end"] = "$year-04-12";
+        $this->testParams["date_format"] = "[Y-]m-d";
+        // Check that the card is rendered as expected
+        $render = generateCard($this->testStats, $this->testParams);
+        $expected = file_get_contents("tests/expected/test_date_card.svg");
+        $this->assertEquals($expected, $render);
+    }
+
     /**
      * Test JSON render
      */