add more tests

Cargo.toml

@@ -8,3 +8,9 @@ edition = "2018"
 [dependencies]
 reedline = {git = "https://github.com/jntrnr/reedline"}
 nu-ansi-term = "0.32.0"
+# mimalloc = { version = "*", default-features = false }
+
+[dev-dependencies]
+tempfile = "3.2.0"
+assert_cmd = "1.0.7"
+pretty_assertions = "0.7.2"

src/main.rs

@@ -117,24 +117,28 @@ fn main() -> std::io::Result<()> {
 
         let file = std::fs::read(&path)?;
 
-        let (block, _err) = working_set.parse_file(&path, &file, false);
-        println!("{}", block.len());
-        // println!("{:#?}", output);
-        // println!("error: {:?}", err);
+        let (block, err) = working_set.parse_file(&path, &file, false);
 
-        //println!("working set: {:#?}", working_set);
+        if let Some(err) = err {
+            eprintln!("Error: {:?}", err);
+            std::process::exit(1);
+        }
 
-        // println!("{}", size_of::<Statement>());
+        let state = State {
+            parser_state: &*parser_state,
+        };
 
-        // let engine = Engine::new();
-        // let result = engine.eval_block(&output);
-        // println!("{:?}", result);
+        let stack = Stack::new();
 
-        // let mut buffer = String::new();
-        // let stdin = std::io::stdin();
-        // let mut handle = stdin.lock();
-
-        // handle.read_to_string(&mut buffer)?;
+        match eval_block(&state, stack, &block) {
+            Ok(value) => {
+                println!("{}", value);
+            }
+            Err(err) => {
+                eprintln!("Error: {:?}", err);
+                std::process::exit(1);
+            }
+        }
 
         Ok(())
     } else {
@@ -181,12 +185,10 @@ fn main() -> std::io::Result<()> {
                             s.as_bytes(),
                             false,
                         );
-                        println!("{:?}", output);
                         if let Some(err) = err {
                             println!("Error: {:?}", err);
-                            continue;
+                            break;
                         }
-                        println!("Error: {:?}", err);
                         (output, working_set.render())
                     };
 
@@ -196,8 +198,14 @@ fn main() -> std::io::Result<()> {
                         parser_state: &*parser_state.borrow(),
                     };
 
-                    let output = eval_block(&state, stack.clone(), &block);
-                    println!("{:#?}", output);
+                    match eval_block(&state, stack.clone(), &block) {
+                        Ok(value) => {
+                            println!("{}", value);
+                        }
+                        Err(err) => {
+                            println!("Error: {:?}", err);
+                        }
+                    }
                 }
                 Signal::CtrlC => {
                     println!("Ctrl-c");

src/tests.rs

@@ -1 +1,63 @@
+use assert_cmd::prelude::*;
+use pretty_assertions::assert_eq;
+use std::io::Write;
+use std::process::Command;
+use tempfile::NamedTempFile;
 
+type TestResult = Result<(), Box<dyn std::error::Error>>;
+
+#[cfg(test)]
+fn run_test(input: &str, expected: &str) -> TestResult {
+    let mut file = NamedTempFile::new()?;
+    let name = file.path();
+
+    let mut cmd = Command::cargo_bin("engine-q")?;
+    cmd.arg(name);
+
+    writeln!(file, "{}", input)?;
+
+    let output = cmd.output()?;
+
+    assert!(output.status.success());
+
+    let output = String::from_utf8_lossy(&output.stdout).to_string();
+
+    assert_eq!(output.trim(), expected);
+
+    Ok(())
+}
+
+#[cfg(test)]
+fn fail_test(input: &str, expected: &str) -> TestResult {
+    let mut file = NamedTempFile::new()?;
+    let name = file.path();
+
+    let mut cmd = Command::cargo_bin("engine-q")?;
+    cmd.arg(name);
+
+    writeln!(file, "{}", input)?;
+
+    let output = cmd.output()?;
+
+    let output = String::from_utf8_lossy(&output.stderr).to_string();
+
+    assert!(output.contains("Error:"));
+    assert!(output.contains(expected));
+
+    Ok(())
+}
+
+#[test]
+fn add_simple() -> TestResult {
+    run_test("3 + 4", "7")
+}
+
+#[test]
+fn add_simple2() -> TestResult {
+    run_test("3 + 4 + 9", "16")
+}
+
+#[test]
+fn broken_math() -> TestResult {
+    fail_test("3 + ", "Incomplete")
+}

src/type_check.rs

@@ -9,6 +9,18 @@ impl<'a> ParserWorkingSet<'a> {
     ) -> (Type, Option<ParseError>) {
         match &op.expr {
             Expr::Operator(operator) => match operator {
+                Operator::Multiply => match (&lhs.ty, &rhs.ty) {
+                    (Type::Int, Type::Int) => (Type::Int, None),
+                    (Type::Unknown, _) => (Type::Unknown, None),
+                    (_, Type::Unknown) => (Type::Unknown, None),
+                    _ => {
+                        *op = Expression::garbage(op.span);
+                        (
+                            Type::Unknown,
+                            Some(ParseError::Mismatch("math".into(), op.span)),
+                        )
+                    }
+                },
                 Operator::Plus => match (&lhs.ty, &rhs.ty) {
                     (Type::Int, Type::Int) => (Type::Int, None),
                     (Type::String, Type::String) => (Type::String, None),