diff --git a/matching_handlers/src/java/method_declaration.rs b/matching_handlers/src/java/method_declaration.rs
index 9ad8cde..3fdb317 100644
--- a/matching_handlers/src/java/method_declaration.rs
+++ b/matching_handlers/src/java/method_declaration.rs
@@ -37,3 +37,140 @@ pub fn compute_matching_score_for_method_declaration<'a>(
         (_, _) => 0,
     }
 }
+#[cfg(test)]
+mod tests {
+    use model::{
+        cst_node::{NonTerminal, Terminal},
+        CSTNode,
+    };
+
+    use crate::java::method_declaration::compute_matching_score_for_method_declaration;
+
+    #[test]
+    fn it_returns_one_if_methods_have_the_same_identifier() {
+        let left =
+            make_method_declaration_node("an_identifier", make_method_parameter("String", "name"));
+        let right =
+            make_method_declaration_node("an_identifier", make_method_parameter("String", "name"));
+        let matching_score = compute_matching_score_for_method_declaration(&left, &right);
+        assert_eq!(1, matching_score);
+    }
+
+    #[test]
+    fn it_returns_zero_if_methods_have_different_identifiers() {
+        let left = make_method_declaration_node(
+            "an_identifier_a",
+            make_method_parameter("String", "name"),
+        );
+        let right = make_method_declaration_node(
+            "an_identifier_b",
+            make_method_parameter("String", "name"),
+        );
+        let matching_score = compute_matching_score_for_method_declaration(&left, &right);
+        assert_eq!(0, matching_score);
+    }
+
+    #[test]
+    fn it_returns_one_if_methods_have_equal_identifiers_and_equal_parameters_list() {
+        let left =
+            make_method_declaration_node("an_identifier", make_method_parameter("String", "name"));
+        let right =
+            make_method_declaration_node("an_identifier", make_method_parameter("String", "name"));
+        let matching_score = compute_matching_score_for_method_declaration(&left, &right);
+        assert_eq!(1, matching_score);
+    }
+
+    #[test]
+    fn it_returns_zero_if_methods_have_equal_identifiers_but_different_parameters_list() {
+        let parameter_left = make_method_parameter("String", "name");
+        let parameter_right = make_method_parameter("int", "another_name");
+
+        let left = make_method_declaration_node("an_identifier", parameter_left);
+        let right = make_method_declaration_node("an_identifier", parameter_right);
+        let matching_score = compute_matching_score_for_method_declaration(&left, &right);
+        assert_eq!(0, matching_score);
+    }
+
+    fn make_method_declaration_node<'a>(
+        identifier: &'a str,
+        parameter: CSTNode<'a>,
+    ) -> CSTNode<'a> {
+        CSTNode::NonTerminal(NonTerminal {
+            kind: "method_declaration",
+            children: vec![
+                CSTNode::NonTerminal(NonTerminal {
+                    kind: "modifiers",
+                    children: vec![CSTNode::Terminal(Terminal {
+                        kind: "public",
+                        value: "public",
+                        ..Default::default()
+                    })],
+                    ..Default::default()
+                }),
+                CSTNode::Terminal(Terminal {
+                    kind: "void_type",
+                    value: "void",
+                    ..Default::default()
+                }),
+                CSTNode::Terminal(Terminal {
+                    kind: "identifier",
+                    value: identifier,
+                    ..Default::default()
+                }),
+                CSTNode::NonTerminal(NonTerminal {
+                    kind: "formal_parameters",
+                    children: vec![
+                        CSTNode::Terminal(Terminal {
+                            kind: "(",
+                            value: "(",
+                            ..Default::default()
+                        }),
+                        parameter,
+                        CSTNode::Terminal(Terminal {
+                            kind: ")",
+                            value: ")",
+                            ..Default::default()
+                        }),
+                    ],
+                    ..Default::default()
+                }),
+                CSTNode::NonTerminal(NonTerminal {
+                    kind: "block",
+                    children: vec![
+                        CSTNode::Terminal(Terminal {
+                            kind: "{",
+                            value: "{",
+                            ..Default::default()
+                        }),
+                        CSTNode::Terminal(Terminal {
+                            kind: "}",
+                            value: "}",
+                            ..Default::default()
+                        }),
+                    ],
+                    ..Default::default()
+                }),
+            ],
+            ..Default::default()
+        })
+    }
+
+    fn make_method_parameter<'a>(a_type: &'a str, identifier: &'a str) -> CSTNode<'a> {
+        CSTNode::NonTerminal(NonTerminal {
+            kind: "formal_parameter",
+            children: vec![
+                CSTNode::Terminal(Terminal {
+                    kind: "type_identifier",
+                    value: a_type,
+                    ..Default::default()
+                }),
+                CSTNode::Terminal(Terminal {
+                    kind: "identifier",
+                    value: identifier,
+                    ..Default::default()
+                }),
+            ],
+            ..Default::default()
+        })
+    }
+}