Add tests for inverse sections

See https://github.com/handlebars-lang/handlebars.js/blob/master/spec/blocks.js#L144

src/test/php/com/handlebarsjs/unittest/InverseOfTest.class.php

@@ -4,11 +4,43 @@
 
 class InverseOfTest extends HelperTest {
 
+  #[Test, Values([[[], 'no people'], [['A', 'B'], 'AB']])]
+  public function inverse_section($input, $outcome) {
+    Assert::equals($outcome, $this->evaluate(
+      '{{#people}}{{this}}{{/people}}{{^people}}no people{{/people}}',
+      ['people' => $input]
+    ));
+  }
+
+  #[Test, Values([[[], 'no people'], [['A', 'B'], 'AB']])]
+  public function inverse_section_with_else($input, $outcome) {
+    Assert::equals($outcome, $this->evaluate(
+      '{{#people}}{{this}}{{else}}no people{{/people}}',
+      ['people' => $input]
+    ));
+  }
+
+  #[Test, Values([[[], 'no people'], [['A', 'B'], 'AB']])]
+  public function inverse_section_with_short_else($input, $outcome) {
+    Assert::equals($outcome, $this->evaluate(
+      '{{#people}}{{this}}{{^}}no people{{/people}}',
+      ['people' => $input]
+    ));
+  }
+
   #[Test, Values([[[], 'no people'], [['A', 'B'], 'some people']])]
   public function inverse_if_with_else($input, $outcome) {
     Assert::equals($outcome, $this->evaluate(
       '{{^if people}}no people{{else}}some people{{/if}}',
       ['people' => $input]
     ));
   }
+
+  #[Test, Values([[[], 'no people'], [['A', 'B'], 'some people']])]
+  public function inverse_if_with_short_else($input, $outcome) {
+    Assert::equals($outcome, $this->evaluate(
+      '{{^if people}}no people{{^}}some people{{/if}}',
+      ['people' => $input]
+    ));
+  }
 }