1 files changed, 152 insertions, 0 deletions
diff --git a/users/tazjin/rlox/src/bytecode/tests.rs b/users/tazjin/rlox/src/bytecode/tests.rs
new file mode 100644
index 0000000000..bc7d6cb878
--- /dev/null
+++ b/users/tazjin/rlox/src/bytecode/tests.rs
@@ -0,0 +1,152 @@
+use super::value::Value;
+use super::*;
+
+use crate::Lox;
+
+fn expect(code: &str, value: Value) {
+    let result = Interpreter::create()
+        .interpret(code.into())
+        .expect("evaluation failed");
+    assert_eq!(result, value);
+}
+
+fn expect_num(code: &str, value: f64) {
+    expect(code, Value::Number(value))
+}
+
+fn expect_bool(code: &str, value: bool) {
+    expect(code, Value::Bool(value))
+}
+
+fn expect_str(code: &str, value: &str) {
+    expect(code, Value::String(value.to_string().into()))
+}
+
+#[test]
+fn numbers() {
+    expect_num("1;", 1.0);
+    expect_num("13.37;", 13.37);
+}
+
+#[test]
+fn negative_numbers() {
+    // Note: This technically tests unary operators.
+    expect_num("-1;", -1.0);
+    expect_num("-13.37;", -13.37);
+}
+
+#[test]
+fn terms() {
+    expect_num("1 + 2;", 3.0);
+    expect_num("3 - 1;", 2.0);
+    expect_num("0.7 + 0.3;", 1.0);
+    expect_num("1 + -3;", -2.0);
+    expect_num("-1 - -1;", 0.0);
+    expect_num("10 - -10 + 10;", 30.0);
+}
+
+#[test]
+fn factors() {
+    expect_num("1 * 2;", 2.0);
+    expect_num("10 / 5;", 2.0);
+    expect_num("0.7 * 4 / 1.4;", 2.0);
+    expect_num("10 * -10 / 10;", -10.0);
+}
+
+#[test]
+fn arithmetic() {
+    expect_num("10 - 3 * 2;", 4.0);
+    expect_num("-4 * -4 + (14 - 5);", 25.0);
+    expect_num("(702 + 408) - ((239 - 734) / -5) + -4;", 1007.0);
+}
+
+#[test]
+fn trivial_literals() {
+    expect("true;", Value::Bool(true));
+    expect("false;", Value::Bool(false));
+    expect("nil;", Value::Nil);
+}
+
+#[test]
+fn negation() {
+    expect_bool("!true;", false);
+    expect_bool("!false;", true);
+    expect_bool("!nil;", true);
+    expect_bool("!13.5;", false);
+    expect_bool("!-42;", false);
+}
+
+#[test]
+fn equality() {
+    expect_bool("42 == 42;", true);
+    expect_bool("42 != 42;", false);
+    expect_bool("42 == 42.0;", true);
+
+    expect_bool("true == true;", true);
+    expect_bool("true == false;", false);
+    expect_bool("true == !false;", true);
+    expect_bool("true != true;", false);
+    expect_bool("true != false;", true);
+
+    expect_bool("42 == false;", false);
+    expect_bool("42 == true;", false);
+    expect_bool("!42 == !true;", true);
+}
+
+#[test]
+fn comparisons() {
+    expect_bool("42 > 23;", true);
+    expect_bool("42 < 23;", false);
+    expect_bool("42 <= 42;", true);
+    expect_bool("42 <= 23;", false);
+    expect_bool("42 >= 42;", true);
+    expect_bool("42 >= 23;", true);
+}
+
+#[test]
+fn strings() {
+    expect_str("\"hello\";", "hello");
+    expect_str("\"hello\" + \" world\";", "hello world");
+}
+
+#[test]
+fn global_variables() {
+    expect_num("var a = 5; a;", 5.0);
+    expect_num("var a = 5; var b = 2; a * b;", 10.0);
+    expect_str(
+        "var greeting = \"hello\"; var name = \"Zubnog\"; greeting + \" \" + name;",
+        "hello Zubnog",
+    );
+}
+
+#[test]
+fn global_assignment() {
+    expect_str(
+        r#"
+          var breakfast = "beignets";
+          var beverage = "cafe au lait";
+          breakfast = "beignets with " + beverage;
+          breakfast;
+        "#,
+        "beignets with cafe au lait",
+    );
+}
+
+#[test]
+fn local_variables() {
+    expect_num(
+        r#"
+          var a = 10;
+          var b = 5;
+          var result = 0;
+          {
+            var b = 10;
+            var c = 2;
+            result = a * b * c;
+          }
+
+          result;
+        "#,
+        200.0,
+    );
+}