Create a package that implements a JSON-RPC 2.0 server.

pkg/json_rpc_2/test/server/parameters_test.dart

Index: pkg/json_rpc_2/test/server/parameters_test.dart
diff --git a/pkg/json_rpc_2/test/server/parameters_test.dart b/pkg/json_rpc_2/test/server/parameters_test.dart
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+// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library json_rpc_2.test.server.parameters_test;
+
+import 'package:unittest/unittest.dart';
+import 'package:json_rpc_2/error_code.dart' as error_code;
+import 'package:json_rpc_2/json_rpc_2.dart' as json_rpc;
+
+import 'utils.dart';
+
+void main() {
+  group("with named parameters", () {
+    var parameters;
+    setUp(() {
+      parameters = new json_rpc.Parameters("foo", {
+        "num": 1.5,
+        "int": 1,
+        "bool": true,
+        "string": "zap",
+        "list": [1, 2, 3],
+        "map": {
+          "num": 4.2,
+          "bool": false
+        }
+      });
+    });
+
+    test("value returns the wrapped value", () {
+      expect(parameters.value, equals({
+        "num": 1.5,
+        "int": 1,
+        "bool": true,
+        "string": "zap",
+        "list": [1, 2, 3],
+        "map": {
+          "num": 4.2,
+          "bool": false
+        }
+      }));
+    });
+
+    test("[int] throws a parameter error", () {
+      expect(() => parameters[0],
+          throwsInvalidParams('Parameters for method "foo" must be passed by '
+              'position.'));
+    });
+
+    test("[].value returns existing parameters", () {
+      expect(parameters['num'].value, equals(1.5));
+    });
+
+    test("[].valueOr returns existing parameters", () {
+      expect(parameters['num'].valueOr(7), equals(1.5));
+    });
+
+    test("[].value fails for absent parameters", () {
+      expect(() => parameters['fblthp'].value,
+          throwsInvalidParams('Request for method "foo" is missing required '
+              'parameter "fblthp".'));
+    });
+
+    test("[].valueOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].valueOr(7), equals(7));
+    });
+
+    test("[].exists returns true for existing parameters", () {
+      expect(parameters['num'].exists, isTrue);
+    });
+
+    test("[].exists returns false for missing parameters", () {
+      expect(parameters['fblthp'].exists, isFalse);
+    });
+
+    test("[].asNum returns numeric parameters", () {
+      expect(parameters['num'].asNum, equals(1.5));
+      expect(parameters['int'].asNum, equals(1));
+    });
+
+    test("[].asNumOr returns numeric parameters", () {
+      expect(parameters['num'].asNumOr(7), equals(1.5));
+    });
+
+    test("[].asNum fails for non-numeric parameters", () {
+      expect(() => parameters['bool'].asNum,
+          throwsInvalidParams('Parameter "bool" for method "foo" must be a '
+              'number, but was true.'));
+    });
+
+    test("[].asNumOr fails for non-numeric parameters", () {
+      expect(() => parameters['bool'].asNumOr(7),
+          throwsInvalidParams('Parameter "bool" for method "foo" must be a '
+              'number, but was true.'));
+    });
+
+    test("[].asNum fails for absent parameters", () {
+      expect(() => parameters['fblthp'].asNum,
+          throwsInvalidParams('Request for method "foo" is missing required '
+              'parameter "fblthp".'));
+    });
+
+    test("[].asNumOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asNumOr(7), equals(7));
+    });
+
+    test("[].asInt returns integer parameters", () {
+      expect(parameters['int'].asInt, equals(1));
+    });
+
+    test("[].asIntOr returns integer parameters", () {
+      expect(parameters['int'].asIntOr(7), equals(1));
+    });
+
+    test("[].asInt fails for non-integer parameters", () {
+      expect(() => parameters['bool'].asInt,
+          throwsInvalidParams('Parameter "bool" for method "foo" must be an '
+              'integer, but was true.'));
+    });
+
+    test("[].asIntOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asIntOr(7), equals(7));
+    });
+
+    test("[].asBool returns boolean parameters", () {
+      expect(parameters['bool'].asBool, isTrue);
+    });
+
+    test("[].asBoolOr returns boolean parameters", () {
+      expect(parameters['bool'].asBoolOr(false), isTrue);
+    });
+
+    test("[].asBoolOr fails for non-boolean parameters", () {
+      expect(() => parameters['int'].asBool,
+          throwsInvalidParams('Parameter "int" for method "foo" must be a '
+              'boolean, but was 1.'));
+    });
+
+    test("[].asBoolOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asBoolOr(false), isFalse);
+    });
+
+    test("[].asString returns string parameters", () {
+      expect(parameters['string'].asString, equals("zap"));
+    });
+
+    test("[].asStringOr returns string parameters", () {
+      expect(parameters['string'].asStringOr("bap"), equals("zap"));
+    });
+
+    test("[].asString fails for non-string parameters", () {
+      expect(() => parameters['int'].asString,
+          throwsInvalidParams('Parameter "int" for method "foo" must be a '
+              'string, but was 1.'));
+    });
+
+    test("[].asStringOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asStringOr("bap"), equals("bap"));
+    });
+
+    test("[].asList returns list parameters", () {
+      expect(parameters['list'].asList, equals([1, 2, 3]));
+    });
+
+    test("[].asListOr returns list parameters", () {
+      expect(parameters['list'].asListOr([5, 6, 7]), equals([1, 2, 3]));
+    });
+
+    test("[].asList fails for non-list parameters", () {
+      expect(() => parameters['int'].asList,
+          throwsInvalidParams('Parameter "int" for method "foo" must be an '
+              'Array, but was 1.'));
+    });
+
+    test("[].asListOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asListOr([5, 6, 7]), equals([5, 6, 7]));
+    });
+
+    test("[].asMap returns map parameters", () {
+      expect(parameters['map'].asMap, equals({"num": 4.2, "bool": false}));
+    });
+
+    test("[].asMapOr returns map parameters", () {
+      expect(parameters['map'].asMapOr({}),
+          equals({"num": 4.2, "bool": false}));
+    });
+
+    test("[].asMap fails for non-map parameters", () {
+      expect(() => parameters['int'].asMap,
+          throwsInvalidParams('Parameter "int" for method "foo" must be an '
+              'Object, but was 1.'));
+    });
+
+    test("[].asMapOr succeeds for absent parameters", () {
+      expect(parameters['fblthp'].asMapOr({}), equals({}));
+    });
+
+    group("with a nested parameter map", () {
+      var nested;
+      setUp(() => nested = parameters['map']);
+
+      test("[int] fails with a type error", () {
+        expect(() => nested[0],
+            throwsInvalidParams('Parameter "map" for method "foo" must be an '
+                'Array, but was {"num":4.2,"bool":false}.'));
+      });
+
+      test("[].value returns existing parameters", () {
+        expect(nested['num'].value, equals(4.2));
+        expect(nested['bool'].value, isFalse);
+      });
+
+      test("[].value fails for absent parameters", () {
+        expect(() => nested['fblthp'].value,
+            throwsInvalidParams('Request for method "foo" is missing required '
+                'parameter map.fblthp.'));
+      });
+
+      test("typed getters return correctly-typed parameters", () {
+        expect(nested['num'].asNum, equals(4.2));
+      });
+
+      test("typed getters fail for incorrectly-typed parameters", () {
+        expect(() => nested['bool'].asNum,
+            throwsInvalidParams('Parameter map.bool for method "foo" must be '
+                'a number, but was false.'));
+      });
+    });
+
+    group("with a nested parameter list", () {
+      var nested;
+      setUp(() => nested = parameters['list']);
+
+      test("[string] fails with a type error", () {
+        expect(() => nested['foo'],
+            throwsInvalidParams('Parameter "list" for method "foo" must be an '
+                'Object, but was [1,2,3].'));
+      });
+
+      test("[].value returns existing parameters", () {
+        expect(nested[0].value, equals(1));
+        expect(nested[1].value, equals(2));
+      });
+
+      test("[].value fails for absent parameters", () {
+        expect(() => nested[5].value,
+            throwsInvalidParams('Request for method "foo" is missing required '
+                'parameter list[5].'));
+      });
+
+      test("typed getters return correctly-typed parameters", () {
+        expect(nested[0].asInt, equals(1));
+      });
+
+      test("typed getters fail for incorrectly-typed parameters", () {
+        expect(() => nested[0].asBool,
+            throwsInvalidParams('Parameter list[0] for method "foo" must be '
+                'a boolean, but was 1.'));
+      });
+    });
+  });
+
+  group("with positional parameters", () {
+    var parameters;
+    setUp(() => parameters = new json_rpc.Parameters("foo", [1, 2, 3, 4, 5]));
+
+    test("value returns the wrapped value", () {
+      expect(parameters.value, equals([1, 2, 3, 4, 5]));
+    });
+
+    test("[string] throws a parameter error", () {
+      expect(() => parameters['foo'],
+          throwsInvalidParams('Parameters for method "foo" must be passed by '
+              'name.'));
+    });
+
+    test("[].value returns existing parameters", () {
+      expect(parameters[2].value, equals(3));
+    });
+
+    test("[].value fails for out-of-range parameters", () {
+      expect(() => parameters[10].value,
+          throwsInvalidParams('Request for method "foo" is missing required '
+              'parameter 11.'));
+    });
+
+    test("[].exists returns true for existing parameters", () {
+      expect(parameters[0].exists, isTrue);
+    });
+
+    test("[].exists returns false for missing parameters", () {
+      expect(parameters[10].exists, isFalse);
+    });
+  });
+
+  test("with a complex parameter path", () {
+    var parameters = new json_rpc.Parameters("foo", {
+      'bar baz': [0, 1, 2, {'bang.zap': {'\n': 'qux'}}]
+    });
+
+    expect(() => parameters['bar baz'][3]['bang.zap']['\n']['bip'],
+        throwsInvalidParams('Parameter "bar baz"[3]."bang.zap"."\\n" for '
+            'method "foo" must be an Object, but was "qux".'));
+  });
+}