Add if/else test

dust-lang/src/parser/tests.rs

@@ -2,6 +2,36 @@ use crate::Local;
 
 use super::*;
 
+#[test]
+fn if_else_expression() {
+    let source = "if 1 == 1 { 2 } else { 3 }";
+
+    assert_eq!(
+        parse(source),
+        Ok(Chunk::with_data(
+            vec![
+                (
+                    *Instruction::equal(true, 0, 1)
+                        .set_first_argument_to_constant()
+                        .set_second_argument_to_constant(),
+                    Span(5, 7)
+                ),
+                (Instruction::jump(1, true), Span(5, 7)),
+                (Instruction::load_constant(0, 2), Span(12, 13)),
+                (Instruction::load_constant(1, 3), Span(23, 24)),
+                (Instruction::r#return(), Span(0, 26)),
+            ],
+            vec![
+                Value::integer(1),
+                Value::integer(1),
+                Value::integer(2),
+                Value::integer(3)
+            ],
+            vec![]
+        )),
+    );
+}
+
 #[test]
 fn list_with_expression() {
     let source = "[1, 2 + 3, 4]";