deno_lint 0.2.1

lint for deno
Documentation 
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// Copyright 2020 the Deno authors. All rights reserved. MIT license.
use super::Context;
use super::LintRule;
use swc_ecmascript::ast::CallExpr;
use swc_ecmascript::ast::Expr;
use swc_ecmascript::ast::ExprOrSuper;
use swc_ecmascript::visit::noop_visit_type;
use swc_ecmascript::visit::Node;
use swc_ecmascript::visit::Visit;

use std::sync::Arc;

pub struct NoEval;

impl LintRule for NoEval {
  fn new() -> Box<Self> {
    Box::new(NoEval)
  }

  fn code(&self) -> &'static str {
    "no-eval"
  }

  fn lint_module(
    &self,
    context: Arc<Context>,
    module: &swc_ecmascript::ast::Module,
  ) {
    let mut visitor = NoEvalVisitor::new(context);
    visitor.visit_module(module, module);
  }
}

struct NoEvalVisitor {
  context: Arc<Context>,
}

impl NoEvalVisitor {
  fn new(context: Arc<Context>) -> Self {
    Self { context }
  }
}

impl Visit for NoEvalVisitor {
  noop_visit_type!();

  fn visit_call_expr(&mut self, call_expr: &CallExpr, _parent: &dyn Node) {
    if let ExprOrSuper::Expr(expr) = &call_expr.callee {
      if let Expr::Ident(ident) = expr.as_ref() {
        let name = ident.sym.as_ref();
        if name == "eval" {
          self.context.add_diagnostic(
            call_expr.span,
            "no-eval",
            "`eval` call is not allowed",
          );
        }
      }
    }
  }
}

#[cfg(test)]
mod tests {
  use super::*;
  use crate::test_util::*;

  #[test]
  fn no_eval_test() {
    assert_lint_err::<NoEval>(r#"eval("123");"#, 0)
  }
}