From 5865ae749699783b062da932321056bea34ff31d Mon Sep 17 00:00:00 2001
From: Edwin Wu <edwinwu@google.com>
Date: Tue, 16 Sep 2025 18:12:35 -0700
Subject: [PATCH] [NC Apple coverage] Add unit tests for
 `nearby::apple::BlePeripheral`.

PiperOrigin-RevId: 807925024
---
 .../platform/implementation/apple/Tests/BUILD |   3 +
 .../apple/Tests/ble_peripheral_test.mm        | 114 ++++++++++++++++++
 2 files changed, 117 insertions(+)
 create mode 100644 internal/platform/implementation/apple/Tests/ble_peripheral_test.mm

diff --git a/internal/platform/implementation/apple/Tests/BUILD b/internal/platform/implementation/apple/Tests/BUILD
index fe7598b7..32fc8778 100644
--- a/internal/platform/implementation/apple/Tests/BUILD
+++ b/internal/platform/implementation/apple/Tests/BUILD
@@ -36,6 +36,7 @@ objc_library(
         "GNCUtilsTest.m",
         "GNCWifiLanMediumTest.mm",
         "UtilsTest.mm",
+        "ble_peripheral_test.mm",
     ],
     deps = [
         "//internal/platform:base",
@@ -44,12 +45,14 @@ objc_library(
         "//internal/platform/implementation/apple",  # buildcleaner: keep
         "//internal/platform/implementation/apple:Shared",
         "//internal/platform/implementation/apple:ble_v2",
+        "//internal/platform/implementation/apple/Mediums/BLE",
         "//internal/platform/implementation/apple/Mediums/WiFiCommon",
         "//internal/platform/implementation/apple/Mediums/WiFiCommon/Tests:FakeNWFramework",
         "//third_party/apple_frameworks:CommonCrypto",
         "//third_party/apple_frameworks:Foundation",
         "//third_party/apple_frameworks:XCTest",
         "@com_google_absl//absl/time",
+        "@com_google_googletest//:gtest",
         "@nlohmann_json//:json",
     ],
 )
diff --git a/internal/platform/implementation/apple/Tests/ble_peripheral_test.mm b/internal/platform/implementation/apple/Tests/ble_peripheral_test.mm
new file mode 100644
index 00000000..efa9ea3b
--- /dev/null
+++ b/internal/platform/implementation/apple/Tests/ble_peripheral_test.mm
@@ -0,0 +1,114 @@
+// Copyright 2025 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "internal/platform/implementation/apple/ble_peripheral.h"
+
+#import <CoreBluetooth/CoreBluetooth.h>
+#import <XCTest/XCTest.h>
+
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#import "internal/platform/implementation/apple/Mediums/BLE/GNCBLEGATTCharacteristic.h"
+#import "internal/platform/implementation/apple/Mediums/BLE/GNCPeripheral.h"
+
+/** Fake @c GNCPeripheral for testing. */
+@interface FakePeripheral : NSObject <GNCPeripheral>
+
+@property(readwrite, copy) NSString *name;
+@property(readwrite, nonatomic) NSUUID *identifier;
+@property(nonatomic, readonly) CBPeripheralState state;
+@property(nonatomic, weak) id<GNCPeripheralDelegate> peripheralDelegate;
+
+- (instancetype)initWithIdentifier:(NSUUID *)identifier name:(NSString *)name;
+
+@end
+
+@implementation FakePeripheral
+
+@synthesize peripheralDelegate = _peripheralDelegate;
+
+- (instancetype)initWithIdentifier:(NSUUID *)identifier name:(NSString *)name {
+  self = [super init];
+  if (self) {
+    _identifier = identifier;
+    _name = [name copy];
+    _state = CBPeripheralStateDisconnected;
+  }
+  return self;
+}
+
+// Implement other GNCPeripheral methods as no-ops or with default return values.
+- (void)discoverServices:(nullable NSArray<CBUUID *> *)serviceUUIDs {
+}
+
+- (nullable NSArray<CBService *> *)services {
+  return @[];
+}
+
+- (void)discoverCharacteristics:(nullable NSArray<CBUUID *> *)characteristicUUIDs
+                     forService:(CBService *)service {
+}
+
+- (void)readValueForCharacteristic:(GNCBLEGATTCharacteristic *)characteristic {
+}
+
+- (void)writeValue:(NSData *)data
+    forCharacteristic:(GNCBLEGATTCharacteristic *)characteristic
+                 type:(CBCharacteristicWriteType)type {
+}
+
+- (BOOL)canSendWriteWithoutResponse {
+  return YES;
+}
+
+- (void)setNotifyValue:(BOOL)enabled forCharacteristic:(GNCBLEGATTCharacteristic *)characteristic {
+}
+
+- (NSUInteger)maximumWriteLengthForType:(CBCharacteristicWriteType)type {
+  return 20;
+}
+
+- (void)openL2CAPChannel:(CBL2CAPPSM)PSM {
+}
+
+@end
+
+@interface GNCBLEPeripheralTest : XCTestCase
+@end
+
+@implementation GNCBLEPeripheralTest
+
+- (void)testIsNull {
+  nearby::apple::BlePeripheral blePeripheral{nil};
+  XCTAssertNil(blePeripheral.GetPeripheral(), @"Peripheral should be nil");
+}
+
+- (void)testDefaultBlePeripheral {
+  nearby::api::ble_v2::BlePeripheral &defaultPeripheral =
+      nearby::apple::BlePeripheral::DefaultBlePeripheral();
+  // 0xffffffffffffffff is the default value from
+  // third_party/nearby/internal/platform/implementation/apple/ble_peripheral.mm when create static
+  // default BlePeripheral.
+  XCTAssertEqual(defaultPeripheral.GetUniqueId(), 0xffffffffffffffff);
+}
+
+- (void)testGetPeripheral {
+  NSUUID *uuid = [NSUUID UUID];
+  FakePeripheral *fakePeripheral = [[FakePeripheral alloc] initWithIdentifier:uuid
+                                                                         name:@"TestDevice"];
+  nearby::apple::BlePeripheral blePeripheral{fakePeripheral};
+  XCTAssertEqualObjects(blePeripheral.GetPeripheral(), fakePeripheral);
+}
+
+@end