Test that value.bound_block is available on struct_block templates

wagtail/tests/testapp/blocks.py

@@ -12,3 +12,11 @@ class LinkBlock(blocks.StructBlock):
 
     class Meta:
         template = 'tests/blocks/link_block.html'
+
+
+class SectionBlock(blocks.StructBlock):
+    title = blocks.CharBlock()
+    body = blocks.RichTextBlock()
+
+    class Meta:
+        template = 'tests/blocks/section_block.html'

wagtail/tests/testapp/templates/tests/blocks/section_block.html

@@ -0,0 +1 @@
+<h1>{{ value.title }}</h1>{{ value.bound_blocks.body.render }}

wagtail/wagtailcore/tests/test_blocks.py

@@ -13,6 +13,8 @@ from wagtail.wagtailcore import blocks
 from wagtail.wagtailcore.rich_text import RichText
 from wagtail.wagtailcore.models import Page
 
+from wagtail.tests.testapp.blocks import SectionBlock
+
 import base64
 
 
@@ -714,6 +716,16 @@ class TestStructBlock(SimpleTestCase):
         with self.assertRaises(ValidationError):
             block.clean(value)
 
+    def test_bound_blocks_are_available_on_template(self):
+        """
+        Test that we are able to use value.bound_blocks within templates
+        to access a child block's own HTML rendering
+        """
+        block = SectionBlock()
+        value = block.to_python({'title': 'Hello', 'body': '<i>italic</i> world'})
+        result = block.render(value)
+        self.assertEqual(result, """<h1>Hello</h1><div class="rich-text"><i>italic</i> world</div>""")
+
 
 class TestListBlock(unittest.TestCase):
     def test_initialise_with_class(self):