refactor(dynamic): enhance Rust receiver construction with recursive dependency resolution, add Liquibase changelog context detection, and expand test coverage

tests/class_method_corpus.rs

@@ -220,6 +220,20 @@ fn class_method_rust_uses_default_constructor() {
     assert!(h.source.contains("instance.run"));
 }
 
+#[test]
+fn class_method_rust_builds_recursive_receiver_literal() {
+    let mut spec = make_spec(Lang::Rust);
+    spec.entry_file = "tests/dynamic_fixtures/class_method/rust_recursive_deps/vuln.rs".into();
+    spec.sink_file = spec.entry_file.clone();
+    let h = lang::emit(&spec).expect("emit ok");
+    assert!(
+        h.source
+            .contains("entry::UserService { runner: entry::CommandRunner")
+    );
+    assert!(!h.source.contains("UserService::default()"));
+    assert!(!h.source.contains("UserService::new()"));
+}
+
 #[test]
 fn class_method_c_collapses_to_class_underscore_method_symbol() {
     let spec = make_spec(Lang::C);
@@ -428,6 +442,17 @@ mod e2e_phase_19 {
             cap: Cap::CODE_EXEC,
             bins: &["cargo"],
         },
+        Case {
+            lang: Lang::Rust,
+            fixture_dir: "rust_recursive_deps",
+            vuln_file: "vuln.rs",
+            benign_file: "benign.rs",
+            vuln_class: "UserService",
+            benign_class: "UserService",
+            method: "run",
+            cap: Cap::CODE_EXEC,
+            bins: &["cargo"],
+        },
         Case {
             lang: Lang::C,
             fixture_dir: "c",

tests/dynamic_fixtures/class_method/rust_recursive_deps/benign.rs

@@ -0,0 +1,23 @@
+// Benign control for recursive Rust class-method receiver construction.
+
+pub struct CommandRunner;
+
+impl CommandRunner {
+    pub fn run(&self, input: &str) -> String {
+        let out = std::process::Command::new("true")
+            .arg(input)
+            .output()
+            .expect("exec");
+        String::from_utf8_lossy(&out.stdout).into_owned()
+    }
+}
+
+pub struct UserService {
+    pub runner: CommandRunner,
+}
+
+impl UserService {
+    pub fn run(&self, input: &str) -> String {
+        self.runner.run(input)
+    }
+}

tests/dynamic_fixtures/class_method/rust_recursive_deps/vuln.rs

@@ -0,0 +1,26 @@
+// Rust class-method fixture whose receiver has same-file dependencies
+// but no Default or new() constructor.
+
+pub struct CommandRunner;
+
+impl CommandRunner {
+    pub fn run(&self, input: &str) -> String {
+        let cmd = format!("true {}", input);
+        let out = std::process::Command::new("sh")
+            .arg("-c")
+            .arg(&cmd)
+            .output()
+            .expect("exec");
+        String::from_utf8_lossy(&out.stdout).into_owned()
+    }
+}
+
+pub struct UserService {
+    pub runner: CommandRunner,
+}
+
+impl UserService {
+    pub fn run(&self, input: &str) -> String {
+        self.runner.run(input)
+    }
+}