add tests for dead code elim

compiler/tests/mutability/cond_mut.leo

@@ -0,0 +1,7 @@
+function main () {
+    let mut x = 100i8;
+    if false {
+        x = 1i8;
+        x *= 100i8;
+    }
+}

compiler/tests/mutability/mod.rs

@@ -51,13 +51,7 @@ fn test_const_fail() {
 
 #[test]
 fn test_cond_mut() {
-    let program_string = r#"function main () {
-        let mut x = 100i8;
-        if false {
-            x = 1i8;
-            x *= 100i8;
-        }
-    }"#;
+    let program_string = include_str!("cond_mut.leo");
     let program = parse_program(program_string).unwrap();
 
     assert_satisfied(program);

compiler/tests/statements/conditional/cond_switch.leo

@@ -0,0 +1,9 @@
+function main (x: bool) -> bool {
+    if false {
+        return x
+    } else if x {
+        return false
+    } else {
+        return false
+    }
+}

compiler/tests/statements/conditional/input/cond_switch.in

@@ -0,0 +1,5 @@
+[main]
+x: bool = true;
+
+[registers]
+r: bool = false;

compiler/tests/statements/conditional/mod.rs

@@ -221,3 +221,16 @@ fn test_multiple_returns() {
 
     output_zero(program);
 }
+
+#[test]
+fn test_cond_switch() {
+    let input_string = include_str!("input/cond_switch.in");
+    let program_string = include_str!("cond_switch.leo");
+    let expect_output = include_bytes!("output/cond_switch.out");
+
+    let program = parse_program_with_input(program_string, input_string).unwrap();
+
+    let actual_output = get_output(program);
+
+    assert_eq!(expect_output, actual_output.bytes().as_slice());
+}

compiler/tests/statements/conditional/output/cond_switch.out

@@ -0,0 +1,2 @@
+[registers]
+r: bool = false;