Fixed exponent expression not being in right-first order of operations

libs/compiler/src/test/mod.rs

@@ -0,0 +1,67 @@
+use super::v2::Compiler;
+use crate::v2::CompilerConfig;
+use indoc::indoc;
+use parser::Parser;
+use std::io::BufWriter;
+use tokenizer::Tokenizer;
+
+macro_rules! output {
+    ($input:expr) => {
+        String::from_utf8($input.into_inner()?)?
+    };
+}
+
+macro_rules! compile {
+    ($source:expr) => {{
+        let mut writer = BufWriter::new(Vec::new());
+        let compiler = Compiler::new(
+            Parser::new(Tokenizer::from(String::from($source))),
+            &mut writer,
+            None,
+        );
+        compiler.compile()?;
+        output!(writer)
+    }};
+
+    (debug $source:expr) => {{
+        let mut writer = BufWriter::new(Vec::new());
+        let compiler = Compiler::new(
+            Parser::new(Tokenizer::from(String::from($source))),
+            &mut writer,
+            Some(CompilerConfig {
+                debug: true,
+                ..Default::default()
+            }),
+        );
+        compiler.compile()?;
+        output!(writer)
+    }};
+}
+
+#[test]
+fn test_function_declaration_with_register_params() -> anyhow::Result<()> {
+    let compiled = compile!(debug r#"
+        // This is a test function declaration with no body
+        fn doSomething(arg1, arg2) {
+        };
+    "#);
+
+    assert_eq!(
+        compiled,
+        indoc! {"
+            j main
+            doSomething:
+            push ra
+            push r4
+            move r4 r0 #arg1
+            push r5
+            move r5 r1 #arg2
+            pop r5
+            pop r4
+            pop ra
+            j ra
+        "}
+    );
+
+    Ok(())
+}