Add tests for whitespace argument in template derive proc-macro

askama_derive/src/config.rs

@@ -549,4 +549,34 @@ mod tests {
         .unwrap();
         assert_eq!(config.whitespace, WhitespaceHandling::Minimize);
     }
+
+    #[cfg(feature = "toml")]
+    #[test]
+    fn test_whitespace_in_template() {
+        // Checking that template arguments have precedence over general configuration.
+        // So in here, in the template arguments, there is `whitespace = "minimize"` so
+        // the `WhitespaceHandling` should be `Minimize` as well.
+        let config = Config::new(
+            r#"
+            [general]
+            whitespace = "suppress"
+            "#,
+            Some(&"minimize".to_owned()),
+        )
+        .unwrap();
+        assert_eq!(config.whitespace, WhitespaceHandling::Minimize);
+
+        let config = Config::new(r#""#, Some(&"minimize".to_owned())).unwrap();
+        assert_eq!(config.whitespace, WhitespaceHandling::Minimize);
+    }
+
+    #[test]
+    fn test_config_whitespace_error() {
+        let config = Config::new(r#""#, Some(&"trim".to_owned()));
+        if let Err(err) = config {
+            assert_eq!(err.msg, "invalid value for `whitespace`: \"trim\"");
+        } else {
+            panic!("Config::new should have return an error");
+        }
+    }
 }

testing/tests/whitespace.rs

@@ -116,3 +116,27 @@ fn test_outer_whitespace() {
     test_template!(" 1{# #} ", " 1 ");
     test_template!("\n1{# #}\n\n\n", "\n1\n\n\n");
 }
+
+macro_rules! test_template_ws_config {
+    ($config:literal, $ws:literal, $source:literal, $rendered: literal) => {{
+        #[derive(Template)]
+        #[template(source = $source, ext = "txt", config = $config, whitespace = $ws)]
+        struct CondWs;
+
+        assert_eq!(CondWs.render().unwrap(), $rendered);
+    }};
+}
+
+#[test]
+fn test_template_whitespace_config() {
+    test_template_ws_config!("test_trim.toml", "preserve", "\t1{# #}\t2", "\t1\t2");
+    test_template_ws_config!("test_trim.toml", "minimize", " 1{# #}  2", " 1 2");
+    test_template_ws_config!("test_trim.toml", "suppress", " 1{# #}  2", " 12");
+    test_template_ws_config!(
+        "test_minimize.toml",
+        "preserve",
+        "\n1{# #}\n\n\n2",
+        "\n1\n\n\n2"
+    );
+    test_template_ws_config!("test_minimize.toml", "suppress", "\n1{# #}\n\n\n2", "\n12");
+}