Introduce query/assert and call it in query.rs.

cli/src/query/assert.rs

@@ -0,0 +1,23 @@
+use lazy_static::lazy_static;
+use regex::Regex;
+use tree_sitter::Point;
+
+// TODO: It would be cooler to do this with a comments query rather than with a regex
+// directly.
+lazy_static! {
+    static ref METADATA_PAIR_REGEX: Regex = Regex::new(r#"(\w+): ([^\s,]+)"#).unwrap();
+    static ref NUMBER_REGEX: Regex = Regex::new(r#"\d+"#).unwrap();
+}
+
+pub struct CaptureInfo {
+    pub name: String,
+}
+
+#[derive(Debug, Eq, PartialEq)]
+struct Assertion {
+    position: Point,
+    line_numbers: Vec<usize>,
+    capture_type: String,
+}
+
+pub fn assert_expected_captures(_captures: Vec<CaptureInfo>, _path: String) {}