Revert "test: add tests for REPL custom evals"

lib/repl.js

@@ -302,6 +302,7 @@ function REPLServer(prompt,
     options.useColors = shouldColorize(options.output);
   }
 
+  // TODO(devsnek): Add a test case for custom eval functions.
   const preview = options.terminal &&
     (options.preview !== undefined ? !!options.preview : !eval_);
 

test/parallel/test-repl-eval.js

@@ -0,0 +1,33 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const repl = require('repl');
+
+{
+  let evalCalledWithExpectedArgs = false;
+
+  const options = {
+    eval: common.mustCall((cmd, context) => {
+      // Assertions here will not cause the test to exit with an error code
+      // so set a boolean that is checked later instead.
+      evalCalledWithExpectedArgs = (cmd === 'function f() {}\n' &&
+                                    context.foo === 'bar');
+    })
+  };
+
+  const r = repl.start(options);
+  r.context = { foo: 'bar' };
+
+  try {
+    // Default preprocessor transforms
+    //  function f() {}  to
+    //  var f = function f() {}
+    // Test to ensure that original input is preserved.
+    // Reference: https://github.com/nodejs/node/issues/9743
+    r.write('function f() {}\n');
+  } finally {
+    r.write('.exit\n');
+  }
+
+  assert(evalCalledWithExpectedArgs);
+}