add some basic unit tests

src/lib.rs

@@ -5,5 +5,6 @@ mod error;
 /// types and methods to ease the r/w of a process's memory
 pub mod process;
 mod sys;
+mod tests;
 
 pub use error::Error;

src/tests.rs

@@ -0,0 +1,29 @@
+#![cfg(test)]
+
+use super::process::*;
+
+#[test]
+fn resolve_pointer_chain_empty() {
+    let myself = Process::find(std::process::id()).unwrap();
+    let result = myself.resolve_pointer_chain(&[]);
+    assert!(result.is_err());
+}
+
+#[test]
+fn resolve_pointer_chain_single() {
+    let myself = Process::find(std::process::id()).unwrap();
+    let result = myself.resolve_pointer_chain(&[myself.base_address]);
+    assert_eq!(result.unwrap(), myself.base_address);
+}
+
+#[test]
+fn resolve_pointer_chain_multiple() {
+    let myself = Process::find(std::process::id()).unwrap();
+    let target_value = 1337;
+    let target_ptr = &target_value as *const i32 as usize;
+    let base_ptr = &target_ptr as *const usize as usize;
+    let address = myself.resolve_pointer_chain(&[base_ptr, 0x0, 0x0]).unwrap();
+    assert_eq!(address, target_ptr);
+    let value = myself.read_mem::<i32>(address).unwrap();
+    assert_eq!(value, target_value);
+}