Obj-C SDK Cleanup

This CL separates the files under sdk/objc into logical directories, replacing
the previous file layout under Framework/.

A long term goal is to have some system set up to generate the files under
sdk/objc/api (the PeerConnection API wrappers) from the C++ code. In the shorter
term the goal is to abstract out shared concepts from these classes in order to
make them as uniform as possible.

The separation into base/, components/, and helpers/ are to differentiate between
the base layer's common protocols, various utilities and the actual platform
specific components.

The old directory layout that resembled a framework's internal layout is not
necessary, since it is generated by the framework target when building it.

Bug: webrtc:9627
Change-Id: Ib084fd83f050ae980649ca99e841f4fb0580bd8f
Reviewed-on: https://webrtc-review.googlesource.com/94142
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Henrik Andreassson <henrika@webrtc.org>
Commit-Queue: Anders Carlsson <andersc@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24493}

sdk/objc/unittests/RTCMediaConstraintsTest.mm

@@ -0,0 +1,68 @@
+/*
+ *  Copyright 2015 The WebRTC 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 in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#import <Foundation/Foundation.h>
+
+#include <memory>
+
+#include "rtc_base/gunit.h"
+
+#import "api/peerconnection/RTCMediaConstraints+Private.h"
+#import "api/peerconnection/RTCMediaConstraints.h"
+#import "helpers/NSString+StdString.h"
+
+@interface RTCMediaConstraintsTest : NSObject
+- (void)testMediaConstraints;
+@end
+
+@implementation RTCMediaConstraintsTest
+
+- (void)testMediaConstraints {
+  NSDictionary *mandatory = @{@"key1": @"value1", @"key2": @"value2"};
+  NSDictionary *optional = @{@"key3": @"value3", @"key4": @"value4"};
+
+  RTCMediaConstraints *constraints = [[RTCMediaConstraints alloc]
+      initWithMandatoryConstraints:mandatory
+               optionalConstraints:optional];
+  std::unique_ptr<webrtc::MediaConstraints> nativeConstraints =
+      [constraints nativeConstraints];
+
+  webrtc::MediaConstraintsInterface::Constraints nativeMandatory =
+      nativeConstraints->GetMandatory();
+  [self expectConstraints:mandatory inNativeConstraints:nativeMandatory];
+
+  webrtc::MediaConstraintsInterface::Constraints nativeOptional =
+      nativeConstraints->GetOptional();
+  [self expectConstraints:optional inNativeConstraints:nativeOptional];
+}
+
+- (void)expectConstraints:(NSDictionary *)constraints
+      inNativeConstraints:
+    (webrtc::MediaConstraintsInterface::Constraints)nativeConstraints {
+  EXPECT_EQ(constraints.count, nativeConstraints.size());
+
+  for (NSString *key in constraints) {
+    NSString *value = [constraints objectForKey:key];
+
+    std::string nativeValue;
+    bool found = nativeConstraints.FindFirst(key.stdString, &nativeValue);
+    EXPECT_TRUE(found);
+    EXPECT_EQ(value.stdString, nativeValue);
+  }
+}
+
+@end
+
+TEST(RTCMediaConstraintsTest, MediaConstraintsTest) {
+  @autoreleasepool {
+    RTCMediaConstraintsTest *test = [[RTCMediaConstraintsTest alloc] init];
+    [test testMediaConstraints];
+  }
+}