Add a simple test for paragraphs.

src/parser/paragraph.rs

@@ -50,3 +50,26 @@ fn paragraph_end<'r, 's>(context: Context<'r, 's>, input: &'s str) -> Res<&'s st
         eof,
     ))(input)
 }
+
+#[cfg(test)]
+mod tests {
+    use crate::parser::parser_context::ContextElement;
+    use crate::parser::parser_context::ContextTree;
+    use crate::parser::parser_with_context::parser_with_context;
+
+    use super::*;
+
+    #[test]
+    fn two_paragraphs() {
+        let input = "foo bar baz\n\nlorem ipsum";
+        let initial_context: ContextTree<'_, '_> = ContextTree::new();
+        let document_context =
+            initial_context.with_additional_node(ContextElement::DocumentRoot(input));
+        let paragraph_matcher = parser_with_context!(paragraph)(&document_context);
+        let (remaining, first_paragraph) = paragraph_matcher(input).unwrap();
+        let (remaining, second_paragraph) = paragraph_matcher(remaining).unwrap();
+        assert_eq!(remaining, "");
+        assert_eq!(first_paragraph.source, "foo bar baz\n\n");
+        assert_eq!(second_paragraph.source, "lorem ipsum");
+    }
+}