Fix duplicated output on subtemplate

src/evaluate.rs

@@ -177,11 +177,13 @@ fn evaluate_template(data: &Value, record: Pair<Rule>) -> Result<(String, bool),
                         }
                     }
                     Rule::template => {
-                        let (evaluation, gobble_inner) = evaluate_template(&data, if_inner)?;
-                        if gobble_inner {
-                            result = result.trim_end_matches(&[' ', '\t']).to_string();
+                        if valid {
+                            let (evaluation, gobble_inner) = evaluate_template(&data, if_inner)?;
+                            if gobble_inner {
+                                result = result.trim_end_matches(&[' ', '\t']).to_string();
+                            }
+                            result.push_str(evaluation.as_str())
                         }
-                        result.push_str(evaluation.as_str())
                     }
                     _ => unreachable!(),
                 }

tests/integration_tests.rs

@@ -1030,4 +1030,23 @@ fn test_assert() {
 \[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z INFO  template\] Parsing configuration using JSON format
 \[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z ERROR template\] ERROR: Could not render template: Assertion failed: Expected value 'true' but found 'false': This is not OK
 $"#).unwrap());
+}
+
+#[test]
+fn if_elif_with_subtemplate() {
+    let mut cmd = Command::cargo_bin("template").unwrap();
+    let assert = cmd
+        .arg("--template")
+        .arg("tests/template/if_elif_with_subtemplate.template")
+        .arg("--configuration")
+        .arg("tests/configuration/hello_world.yml")
+        .assert();
+
+    assert
+        .success()
+        .stdout("Hello\n")
+        .stderr(is_match(r#"^\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z INFO  template\] Using template file 'tests/template/if_elif_with_subtemplate.template'
+\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z INFO  template\] Using configuration file 'tests/configuration/hello_world.yml'
+\[\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}Z INFO  template\] Parsing configuration using YAML format
+$"#).unwrap());
 }

tests/template/if_elif_with_subtemplate.template

@@ -0,0 +1,5 @@
+{% if match %}
+-{% value %}-
+{% else %}
+{% value %}
+{% end %}