Fix for "back to search" always appearing

This link was appearing even when there was no search context present

ds_judgements_public_ui/templates/includes/judgment_text_toolbar.html

@@ -1,10 +1,11 @@
 {% load i18n %}
 <div class="judgment-toolbar">
-  <div class="judgment-toolbar__return-link">
-    <a href="{{ context.back_link }}">{% translate "judgment.back" %}</a>
-  </div>
+  {% if context.back_link %}
+    <div class="judgment-toolbar__return-link">
+      <a href="{{ context.back_link }}">{% translate "judgment.back" %}</a>
+    </div>
+  {% endif %}
   <div class="judgment-toolbar__container">
-    {% if context.back_link %}{% endif %}
     <h1 class="judgment-toolbar__title">
       {{ context.judgment_title }}
       <br>

judgments/tests/test_detail.py

@@ -72,6 +72,19 @@ def test_published_judgment_response(self, mock_judgment, mock_pdf_size):
         self.assertEqual(response.status_code, 200)
 
 
+class TestJudgmentBackToSearchLink(TestCase):
+    @patch("judgments.views.detail.get_pdf_size")
+    @patch("judgments.views.detail.get_published_judgment_by_uri")
+    def test_no_link_if_no_context(self, mock_judgment, mock_pdf_size):
+        mock_judgment.return_value = JudgmentFactory.build(is_published=True)
+        mock_pdf_size.return_value = "1234KB"
+
+        response = self.client.get("/test/2023/123")
+        decoded_response = response.content.decode("utf-8")
+
+        assert "Back to search results" not in decoded_response
+
+
 class TestJudgmentPdfLinkText(TestCase):
     @patch("judgments.views.detail.get_pdf_size")
     @patch("judgments.views.detail.get_published_judgment_by_uri")