Add CairoRunner.get_program (#1123)

* Add CairoRunner.get_program

* Update CHANGELOG.md

Author: pefontana

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 #### Upcoming Changes
 
+* Add `CairoRunner::get_program method` [#1123](https://github.com/lambdaclass/cairo-rs/pull/1123):
+
 * Use to_signed_felt as function for felt252 as BigInt within [-P/2, P/2] range and use to_bigint as function for representation as BigInt. [#1100](https://github.com/lambdaclass/cairo-rs/pull/1100)
 
 * Implement hint on field_arithmetic lib [#1090](https://github.com/lambdaclass/cairo-rs/pull/1090)

src/vm/runners/cairo_runner.rs

@@ -1061,6 +1061,11 @@ impl CairoRunner {
         }
         Ok(stack_ptr)
     }
+
+    /// Return CairoRunner.program
+    pub fn get_program(&self) -> &Program {
+        &self.program
+    }
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -4826,4 +4831,15 @@ mod tests {
             }
         );
     }
+
+    #[test]
+    fn test_get_program() {
+        let program = program!(
+            builtins = vec![BuiltinName::output],
+            data = vec_data!((4), (6)),
+        );
+        let runner = cairo_runner!(program);
+
+        assert_eq!(runner.get_program().data_len(), 2)
+    }
 }