test262: Add an extremelly basic test262 runner

Many of the test262 test cases currently cause the interpreter to crash.
First goal is to eliminate these crashes (or teach the test runner to
tolerate them) so that this can actually be useful.

At that point, the number of passing vs. failing test cases can start to
be tracked and graphed, and then iteratively improved with Graph Driven
Development (GDD).

Author: jakemarsden

.run/test262__run [release].run.xml

@@ -0,0 +1,19 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="test262::run [release]" type="CargoCommandRunConfiguration" factoryName="Cargo Command" folderName="test262">
+    <option name="command" value="run --release --package jakescript-tests262" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <option name="channel" value="DEFAULT" />
+    <option name="requiredFeatures" value="true" />
+    <option name="allFeatures" value="false" />
+    <option name="emulateTerminal" value="false" />
+    <option name="withSudo" value="false" />
+    <option name="buildTarget" value="REMOTE" />
+    <option name="backtrace" value="SHORT" />
+    <envs />
+    <option name="isRedirectInput" value="false" />
+    <option name="redirectInputPath" value="" />
+    <method v="2">
+      <option name="CARGO.BUILD_TASK_PROVIDER" enabled="true" />
+    </method>
+  </configuration>
+</component>

.run/test262__run.run.xml

@@ -0,0 +1,19 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="test262::run" type="CargoCommandRunConfiguration" factoryName="Cargo Command" folderName="test262">
+    <option name="command" value="run --package jakescript-tests262" />
+    <option name="workingDirectory" value="file://$PROJECT_DIR$" />
+    <option name="channel" value="DEFAULT" />
+    <option name="requiredFeatures" value="true" />
+    <option name="allFeatures" value="false" />
+    <option name="emulateTerminal" value="false" />
+    <option name="withSudo" value="false" />
+    <option name="buildTarget" value="REMOTE" />
+    <option name="backtrace" value="SHORT" />
+    <envs />
+    <option name="isRedirectInput" value="false" />
+    <option name="redirectInputPath" value="" />
+    <method v="2">
+      <option name="CARGO.BUILD_TASK_PROVIDER" enabled="true" />
+    </method>
+  </configuration>
+</component>

Cargo.toml

@@ -2,6 +2,7 @@
 members = [
     "jakescript",
     "jakescript-cli",
+    "jakescript-test262",
 ]
 
 [profile.release]

jakescript-test262/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "jakescript-tests262"
+version = "0.1.0"
+authors = ["Jake Marsden <[email protected]>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+jakescript = { path = "../jakescript" }
+test262-harness = "0.1"

jakescript-test262/src/main.rs

@@ -0,0 +1,58 @@
+//! It is expected that the _[test262](https://github.com/tc39/test262)_ repository is checked out
+//! next to this repository.
+
+use jakescript::interpreter::{Eval, Interpreter, Vm};
+use jakescript::lexer::Lexer;
+use jakescript::parser::Parser;
+use jakescript::token::SourceLocation;
+use std::path::Path;
+use test262_harness::{Error, Harness, Test};
+
+static TEST262_ROOT_DIR: &str = "../test262";
+static TEST262_TEST_DIR: &str = "../test262/test";
+
+fn main() {
+    let harness = Harness::new(TEST262_ROOT_DIR).expect("failed to initialize harness");
+    for test in harness {
+        match test {
+            Ok(test) if is_test_we_care_about(&test.path) => {
+                println!("running test from {:?}", test.path);
+                exec_test(&test);
+            }
+            Err(Error::DescriptionInvalid(path)) if is_test_we_care_about(&path) => {
+                eprintln!("description invalid: {}", path.display());
+            }
+
+            Ok(..) | Err(Error::DescriptionInvalid(..)) => {}
+            Err(err) => panic!("{}", err),
+        };
+    }
+}
+
+fn is_test_we_care_about(path: impl AsRef<Path>) -> bool {
+    path.as_ref().starts_with(TEST262_TEST_DIR)
+}
+
+fn exec_test(test: &Test) {
+    let lexer = Lexer::for_str(&test.source, SourceLocation::at_start_of(&test.path));
+    let parser = Parser::for_lexer(lexer);
+
+    let script = match parser.execute() {
+        Ok(script) => script,
+        Err(err) => {
+            eprintln!("FAIL (parse) {}: {}", test.path.display(), err);
+            return;
+        }
+    };
+
+    let mut it = Interpreter::new(Vm::new().unwrap());
+    match script.eval(&mut it) {
+        Ok(_) => {}
+        Err(err) => {
+            eprintln!("FAIL (runtime) {}: {}", test.path.display(), err);
+            return;
+        }
+    }
+
+    println!("PASS {}", test.path.display());
+}