Do not execute elif statements if another statement has already been executed

src/main/java/com/hubspot/jinjava/lib/tag/IfTag.java

@@ -80,7 +80,7 @@ public String interpret(TagNode tagNode, JinjavaInterpreter interpreter) {
         if (TagNode.class.isAssignableFrom(node.getClass())) {
           TagNode tag = (TagNode) node;
           if (tag.getName().equals(ElseIfTag.ELSEIF)) {
-            execute = isPositiveIfElseNode(tag, interpreter);
+            execute = !executedAnyBlock && isPositiveIfElseNode(tag, interpreter);
             continue;
           } else if (tag.getName().equals(ElseTag.ELSE)) {
             execute = !executedAnyBlock;

src/test/java/com/hubspot/jinjava/lib/tag/IfTagTest.java

@@ -86,6 +86,13 @@ public void itEvalsOnlyIfInElifTreeWhenExpIsTrue() {
     assertThat(tag.interpret(n, interpreter).trim()).isEqualTo("ifblock");
   }
 
+  @Test
+  public void itEvalsOnlyIfInElifTreeWhenBothAreTrue() {
+    context.put("foo", "bar");
+    TagNode n = fixture("if-true-elif-true");
+    assertThat(tag.interpret(n, interpreter).trim()).isEqualTo("one");
+  }
+
   @Test
   public void itEvalsOnlyElifInTreeWhenExp2IsTrue() {
     context.put("foo", "");

src/test/resources/tags/iftag/if-true-elif-true.jinja

@@ -0,0 +1,5 @@
+{% if true %}
+one
+{% elif true %}
+two
+{% endif %}