Add tests for generator/debugger interaction

R=yangguo@chromium.org
BUG=

Review URL: https://codereview.chromium.org/247003004


Review URL: https://codereview.chromium.org/256733004

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20964 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/harmony/generators-debug-scopes.js

+// Copyright 2014 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --expose-debug-as debug --harmony-generators
+
+var Debug = debug.Debug;
+
+function RunTest(name, formals_and_body, args, handler, continuation) {
+  var handler_called = false;
+  var exception = null;
+
+  function listener(event, exec_state, event_data, data) {
+    try {
+      if (event == Debug.DebugEvent.Break) {
+        handler_called = true;
+        handler(exec_state);
+      }
+    } catch (e) {
+      exception = e;
+    }
+  }
+
+  function run(thunk) {
+    handler_called = false;
+    exception = null;
+
+    var res = thunk();
+    if (continuation)
+      continuation(res);
+
+    assertTrue(handler_called, "listener not called for " + name);
+    assertNull(exception, name + " / " + exception);
+  }
+
+  var fun = Function.apply(null, formals_and_body);
+  var gen = (function*(){}).constructor.apply(null, formals_and_body);
+
+  Debug.setListener(listener);
+
+  run(function () { return fun.apply(null, args) });
+  run(function () { return gen.apply(null, args).next().value });
+
+  // TODO(wingo): Uncomment after bug 2838 is fixed.
+  // Debug.setListener(null);
+}
+
+// Check that two scope are the same.
+function assertScopeMirrorEquals(scope1, scope2) {
+  assertEquals(scope1.scopeType(), scope2.scopeType());
+  assertEquals(scope1.frameIndex(), scope2.frameIndex());
+  assertEquals(scope1.scopeIndex(), scope2.scopeIndex());
+  assertPropertiesEqual(scope1.scopeObject().value(), scope2.scopeObject().value());
+}
+
+function CheckFastAllScopes(scopes, exec_state) {
+  var fast_all_scopes = exec_state.frame().allScopes(true);
+  var length = fast_all_scopes.length;
+  assertTrue(scopes.length >= length);
+  for (var i = 0; i < scopes.length && i < length; i++) {
+    var scope = fast_all_scopes[length - i - 1];
+    assertTrue(scope.isScope());
+    assertEquals(scopes[scopes.length - i - 1], scope.scopeType());
+  }
+}
+
+// Check that the scope chain contains the expected types of scopes.
+function CheckScopeChain(scopes, exec_state) {
+  var all_scopes = exec_state.frame().allScopes();
+  assertEquals(scopes.length, exec_state.frame().scopeCount());
+  assertEquals(scopes.length, all_scopes.length, "FrameMirror.allScopes length");
+  for (var i = 0; i < scopes.length; i++) {
+    var scope = exec_state.frame().scope(i);
+    assertTrue(scope.isScope());
+    assertEquals(scopes[i], scope.scopeType());
+    assertScopeMirrorEquals(all_scopes[i], scope);
+
+    // Check the global object when hitting the global scope.
+    if (scopes[i] == debug.ScopeType.Global) {
+      // Objects don't have same class (one is "global", other is "Object",
+      // so just check the properties directly.
+      assertPropertiesEqual(this, scope.scopeObject().value());
+    }
+  }
+  CheckFastAllScopes(scopes, exec_state);
+
+  // Get the debug command processor.
+  var dcp = exec_state.debugCommandProcessor("unspecified_running_state");
+
+  // Send a scopes request and check the result.
+  var json;
+  var request_json = '{"seq":0,"type":"request","command":"scopes"}';
+  var response_json = dcp.processDebugJSONRequest(request_json);
+  var response = JSON.parse(response_json);
+  assertEquals(scopes.length, response.body.scopes.length);
+  for (var i = 0; i < scopes.length; i++) {
+    assertEquals(i, response.body.scopes[i].index);
+    assertEquals(scopes[i], response.body.scopes[i].type);
+    if (scopes[i] == debug.ScopeType.Local ||
+        scopes[i] == debug.ScopeType.Closure) {
+      assertTrue(response.body.scopes[i].object.ref < 0);
+    } else {
+      assertTrue(response.body.scopes[i].object.ref >= 0);
+    }
+    var found = false;
+    for (var j = 0; j < response.refs.length && !found; j++) {
+      found = response.refs[j].handle == response.body.scopes[i].object.ref;
+    }
+    assertTrue(found, "Scope object " + response.body.scopes[i].object.ref + " not found");
+  }
+}
+
+// Check that the content of the scope is as expected. For functions just check
+// that there is a function.
+function CheckScopeContent(content, number, exec_state) {
+  var scope = exec_state.frame().scope(number);
+  var count = 0;
+  for (var p in content) {
+    var property_mirror = scope.scopeObject().property(p);
+    assertFalse(property_mirror.isUndefined(), 'property ' + p + ' not found in scope');
+    if (typeof(content[p]) === 'function') {
+      assertTrue(property_mirror.value().isFunction());
+    } else {
+      assertEquals(content[p], property_mirror.value().value(), 'property ' + p + ' has unexpected value');
+    }
+    count++;
+  }
+
+  // 'arguments' and might be exposed in the local and closure scope. Just
+  // ignore this.
+  var scope_size = scope.scopeObject().properties().length;
+  if (!scope.scopeObject().property('arguments').isUndefined()) {
+    scope_size--;
+  }
+  // Skip property with empty name.
+  if (!scope.scopeObject().property('').isUndefined()) {
+    scope_size--;
+  }
+
+  if (count != scope_size) {
+    print('Names found in scope:');
+    var names = scope.scopeObject().propertyNames();
+    for (var i = 0; i < names.length; i++) {
+      print(names[i]);
+    }
+  }
+  assertEquals(count, scope_size);
+
+  // Get the debug command processor.
+  var dcp = exec_state.debugCommandProcessor("unspecified_running_state");
+
+  // Send a scope request for information on a single scope and check the
+  // result.
+  var request_json = '{"seq":0,"type":"request","command":"scope","arguments":{"number":';
+  request_json += scope.scopeIndex();
+  request_json += '}}';
+  var response_json = dcp.processDebugJSONRequest(request_json);
+  var response = JSON.parse(response_json);
+  assertEquals(scope.scopeType(), response.body.type);
+  assertEquals(number, response.body.index);
+  if (scope.scopeType() == debug.ScopeType.Local ||
+      scope.scopeType() == debug.ScopeType.Closure) {
+    assertTrue(response.body.object.ref < 0);
+  } else {
+    assertTrue(response.body.object.ref >= 0);
+  }
+  var found = false;
+  for (var i = 0; i < response.refs.length && !found; i++) {
+    found = response.refs[i].handle == response.body.object.ref;
+  }
+  assertTrue(found, "Scope object " + response.body.object.ref + " not found");
+}
+
+
+// Simple empty local scope.
+RunTest("Local 1",
+        ['debugger;'],
+        [],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({}, 0, exec_state);
+        });
+
+// Local scope with a parameter.
+RunTest("Local 2",
+        ['a', 'debugger;'],
+        [1],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({a:1}, 0, exec_state);
+        });
+
+// Local scope with a parameter and a local variable.
+RunTest("Local 3",
+        ['a', 'var x = 3; debugger;'],
+        [1],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({a:1,x:3}, 0, exec_state);
+        });
+
+// Local scope with parameters and local variables.
+RunTest("Local 4",
+        ['a', 'b', 'var x = 3; var y = 4; debugger;'],
+        [1, 2],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({a:1,b:2,x:3,y:4}, 0, exec_state);
+        });
+
+// Empty local scope with use of eval.
+RunTest("Local 5",
+        ['eval(""); debugger;'],
+        [],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({}, 0, exec_state);
+        });
+
+// Local introducing local variable using eval.
+RunTest("Local 6",
+        ['eval("var i = 5"); debugger;'],
+        [],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({i:5}, 0, exec_state);
+        });
+
+// Local scope with parameters, local variables and local variable introduced
+// using eval.
+RunTest("Local 7",
+        ['a', 'b',
+         "var x = 3; var y = 4;\n"
+         + "eval('var i = 5'); eval ('var j = 6');\n"
+         + "debugger;"],
+        [1, 2],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6}, 0, exec_state);
+        });
+
+// Nested empty with blocks.
+RunTest("With",
+        ["with ({}) { with ({}) { debugger; } }"],
+        [],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.With,
+                           debug.ScopeType.With,
+                           debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({}, 0, exec_state);
+          CheckScopeContent({}, 1, exec_state);
+        });
+
+// Simple closure formed by returning an inner function referering the outer
+// functions arguments.
+RunTest("Closure 1",
+        ['a', 'return function() { debugger; return a; }'],
+        [1],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Local,
+                           debug.ScopeType.Closure,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({a:1}, 1, exec_state);
+        },
+       function (result) { result() });
+
+RunTest("The full monty",
+        ['a', 'b',
+         "var x = 3;\n" +
+         "var y = 4;\n" +
+         "eval('var i = 5');\n" +
+         "eval('var j = 6');\n" +
+         "function f(a, b) {\n" +
+         "  var x = 9;\n" +
+         "  var y = 10;\n" +
+         "  eval('var i = 11');\n" +
+         "  eval('var j = 12');\n" +
+         "  with ({j:13}){\n" +
+         "    return function() {\n" +
+         "      var x = 14;\n" +
+         "      with ({a:15}) {\n" +
+         "        with ({b:16}) {\n" +
+         "          debugger;\n" +
+         "          some_global = a;\n" +
+         "          return f;\n" +
+         "        }\n" +
+         "      }\n" +
+         "    };\n" +
+         "  }\n" +
+         "}\n" +
+         "return f(a, b);"],
+        [1, 2],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.With,
+                           debug.ScopeType.With,
+                           debug.ScopeType.Local,
+                           debug.ScopeType.With,
+                           debug.ScopeType.Closure,
+                           debug.ScopeType.Closure,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({b:16}, 0, exec_state);
+          CheckScopeContent({a:15}, 1, exec_state);
+          CheckScopeContent({x:14}, 2, exec_state);
+          CheckScopeContent({j:13}, 3, exec_state);
+          CheckScopeContent({a:1,b:2,x:9,y:10,i:11,j:12}, 4, exec_state);
+          CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6,f:function(){}}, 5, exec_state);
+        },
+        function (result) { result() });
+
+RunTest("Catch block 1",
+        ["try { throw 'Exception'; } catch (e) { debugger; }"],
+        [],
+        function (exec_state) {
+          CheckScopeChain([debug.ScopeType.Catch,
+                           debug.ScopeType.Local,
+                           debug.ScopeType.Global], exec_state);
+          CheckScopeContent({e:'Exception'}, 0, exec_state);
+        });