Add test that meta context variables are not overridden when importing

Author: jasmith-hs

src/test/java/com/hubspot/jinjava/EagerTest.java

@@ -1572,4 +1572,21 @@ public void itReconstructsBlockPathWhenDeferredNestedSecondPass() {
       "reconstructs-block-path-when-deferred-nested/test.expected"
     );
   }
+
+  @Test
+  public void itKeepsMetaContextVariablesThroughImport() {
+    setupWithExecutionMode(
+      new EagerExecutionMode() {
+        @Override
+        public void prepareContext(Context context) {
+          super.prepareContext(context);
+          context.getMetaContextVariables().add("meta");
+        }
+      }
+    );
+    interpreter.getContext().put("meta", new ArrayList<>());
+    expectedTemplateInterpreter.assertExpectedOutput(
+      "keeps-meta-context-variables-through-import/test"
+    );
+  }
 }

src/test/resources/eager/keeps-meta-context-variables-through-import/import-target.jinja

@@ -0,0 +1 @@
+I am a boring import

src/test/resources/eager/keeps-meta-context-variables-through-import/test.expected.jinja

@@ -0,0 +1,4 @@
+{% set list = deferred %}
+
+{% set meta = ['overridden'] %}{% do list.append(meta) %}
+{{ list }}

src/test/resources/eager/keeps-meta-context-variables-through-import/test.jinja

@@ -0,0 +1,5 @@
+{% set meta = ['overridden'] %}
+{% set list = deferred %}
+{% import '../../eager/keeps-meta-context-variables-through-import/import-target.jinja' %}
+{% do list.append(meta) %}
+{{ list }}