1 files changed, 126 insertions, 0 deletions
diff --git a/platform/darwin/test/MGLOfflineStorageTests.m b/platform/darwin/test/MGLOfflineStorageTests.m
new file mode 100644
index 0000000000..8ffa1207ce
--- /dev/null
+++ b/platform/darwin/test/MGLOfflineStorageTests.m
@@ -0,0 +1,126 @@
+#import <Mapbox/Mapbox.h>
+
+#pragma clang diagnostic ignored "-Wgnu-statement-expression"
+#pragma clang diagnostic ignored "-Wgnu-zero-variadic-macro-arguments"
+
+#import <XCTest/XCTest.h>
+
+@interface MGLOfflineStorageTests : XCTestCase
+
+@end
+
+@implementation MGLOfflineStorageTests
+
+- (void)testSharedObject {
+    XCTAssertEqual([MGLOfflineStorage sharedOfflineStorage], [MGLOfflineStorage sharedOfflineStorage], @"There should only be one shared offline storage object.");
+}
+
+// This test needs to come first so it can test the initial loading of packs.
+- (void)testAAALoadPacks {
+    XCTestExpectation *kvoExpectation = [self keyValueObservingExpectationForObject:[MGLOfflineStorage sharedOfflineStorage] keyPath:@"packs" handler:^BOOL(id _Nonnull observedObject, NSDictionary * _Nonnull change) {
+        NSKeyValueChange changeKind = [change[NSKeyValueChangeKindKey] unsignedIntegerValue];
+        return changeKind = NSKeyValueChangeSetting;
+    }];
+    
+    [self waitForExpectationsWithTimeout:1 handler:nil];
+    
+    XCTAssertNotNil([MGLOfflineStorage sharedOfflineStorage].packs, @"Shared offline storage object should have a non-nil collection of packs by this point.");
+}
+
+- (void)testAddPack {
+    NSUInteger countOfPacks = [MGLOfflineStorage sharedOfflineStorage].packs.count;
+    
+    NSURL *styleURL = [MGLStyle lightStyleURL];
+    /// Somewhere near Grape Grove, Ohio, United States.
+    MGLCoordinateBounds bounds = {
+        { 39.70358155855172, -83.69506472545841 },
+        { 39.703818870225376, -83.69420641857361 },
+    };
+    double zoomLevel = 20;
+    MGLTilePyramidOfflineRegion *region = [[MGLTilePyramidOfflineRegion alloc] initWithStyleURL:styleURL bounds:bounds fromZoomLevel:zoomLevel toZoomLevel:zoomLevel];
+    
+    NSString *nameKey = @"Name";
+    NSString *name = @"🍇 Grape Grove";
+    
+    NSData *context = [NSKeyedArchiver archivedDataWithRootObject:@{
+        nameKey: name,
+    }];
+    
+    __block MGLOfflinePack *pack;
+    [self keyValueObservingExpectationForObject:[MGLOfflineStorage sharedOfflineStorage] keyPath:@"packs" handler:^BOOL(id _Nonnull observedObject, NSDictionary * _Nonnull change) {
+        NSKeyValueChange changeKind = [change[NSKeyValueChangeKindKey] unsignedIntegerValue];
+        NSIndexSet *indices = change[NSKeyValueChangeIndexesKey];
+        return changeKind == NSKeyValueChangeInsertion && indices.count == 1;
+    }];
+    XCTestExpectation *additionCompletionHandlerExpectation = [self expectationWithDescription:@"add pack completion handler"];
+    [[MGLOfflineStorage sharedOfflineStorage] addPackForRegion:region withContext:context completionHandler:^(MGLOfflinePack * _Nullable completionHandlerPack, NSError * _Nullable error) {
+        XCTAssertNotNil(completionHandlerPack, @"Added pack should exist.");
+        XCTAssertEqual(completionHandlerPack.state, MGLOfflinePackStateInactive, @"New pack should initially have inactive state.");
+        pack = completionHandlerPack;
+        [additionCompletionHandlerExpectation fulfill];
+    }];
+    [self waitForExpectationsWithTimeout:1 handler:nil];
+    
+    XCTAssertEqual([MGLOfflineStorage sharedOfflineStorage].packs.count, countOfPacks + 1, @"Added pack should have been added to the canonical collection of packs owned by the shared offline storage object. This assertion can fail if this test is run before -testAAALoadPacks.");
+    
+    XCTAssertEqual(pack, [MGLOfflineStorage sharedOfflineStorage].packs.lastObject, @"Pack should be appended to end of packs array.");
+    
+    XCTAssertEqualObjects(pack.region, region, @"Added pack’s region has changed.");
+    
+    NSDictionary *userInfo = [NSKeyedUnarchiver unarchiveObjectWithData:pack.context];
+    XCTAssert([userInfo isKindOfClass:[NSDictionary class]], @"Context of offline pack isn’t a dictionary.");
+    XCTAssert([userInfo[nameKey] isKindOfClass:[NSString class]], @"Name of offline pack isn’t a string.");
+    XCTAssertEqualObjects(userInfo[nameKey], name, @"Name of offline pack has changed.");
+    
+    XCTAssertEqual(pack.state, MGLOfflinePackStateInactive, @"New pack should initially have inactive state.");
+    
+    [self keyValueObservingExpectationForObject:pack keyPath:@"state" handler:^BOOL(id _Nonnull observedObject, NSDictionary * _Nonnull change) {
+        NSKeyValueChange changeKind = [change[NSKeyValueChangeKindKey] unsignedIntegerValue];
+        MGLOfflinePackState state = [change[NSKeyValueChangeNewKey] integerValue];
+        return changeKind == NSKeyValueChangeSetting && state == MGLOfflinePackStateInactive;
+    }];
+    [self expectationForNotification:MGLOfflinePackProgressChangedNotification object:pack handler:^BOOL(NSNotification * _Nonnull notification) {
+        MGLOfflinePack *notificationPack = notification.object;
+        XCTAssert([notificationPack isKindOfClass:[MGLOfflinePack class]], @"Object of notification should be an MGLOfflinePack.");
+        
+        NSDictionary *userInfo = notification.userInfo;
+        XCTAssertNotNil(userInfo, @"Progress change notification should have a userInfo dictionary.");
+        
+        NSNumber *stateNumber = userInfo[MGLOfflinePackStateUserInfoKey];
+        XCTAssert([stateNumber isKindOfClass:[NSNumber class]], @"Progress change notification’s state should be an NSNumber.");
+        XCTAssertEqual(stateNumber.integerValue, pack.state, @"State in a progress change notification should match the pack’s state.");
+        
+        NSValue *progressValue = userInfo[MGLOfflinePackProgressUserInfoKey];
+        XCTAssert([progressValue isKindOfClass:[NSValue class]], @"Progress change notification’s progress should be an NSValue.");
+        XCTAssertEqualObjects(progressValue, [NSValue valueWithMGLOfflinePackProgress:pack.progress], @"Progress change notification’s progress should match pack’s progress.");
+        
+        return notificationPack == pack && pack.state == MGLOfflinePackStateInactive;
+    }];
+    [pack requestProgress];
+    [self waitForExpectationsWithTimeout:1 handler:nil];
+}
+
+- (void)testRemovePack {
+    NSUInteger countOfPacks = [MGLOfflineStorage sharedOfflineStorage].packs.count;
+    
+    MGLOfflinePack *pack = [MGLOfflineStorage sharedOfflineStorage].packs.lastObject;
+    XCTAssertNotNil(pack, @"Added pack should still exist.");
+    
+    XCTestExpectation *kvoExpectation = [self keyValueObservingExpectationForObject:[MGLOfflineStorage sharedOfflineStorage] keyPath:@"packs" handler:^BOOL(id _Nonnull observedObject, NSDictionary * _Nonnull change) {
+        NSKeyValueChange changeKind = [change[NSKeyValueChangeKindKey] unsignedIntegerValue];
+        NSIndexSet *indices = change[NSKeyValueChangeIndexesKey];
+        return changeKind = NSKeyValueChangeRemoval && indices.count == 1;
+    }];
+    XCTestExpectation *completionHandlerExpectation = [self expectationWithDescription:@"remove pack completion handler"];
+    [[MGLOfflineStorage sharedOfflineStorage] removePack:pack withCompletionHandler:^(NSError * _Nullable error) {
+        XCTAssertEqual(pack.state, MGLOfflinePackStateInvalid, @"Removed pack should be invalid in the completion handler.");
+        [completionHandlerExpectation fulfill];
+    }];
+    [self waitForExpectationsWithTimeout:1 handler:nil];
+    
+    XCTAssertEqual(pack.state, MGLOfflinePackStateInvalid, @"Removed pack should have been invalidated synchronously.");
+    
+    XCTAssertEqual([MGLOfflineStorage sharedOfflineStorage].packs.count, countOfPacks - 1, @"Removed pack should have been removed from the canonical collection of packs owned by the shared offline storage object. This assertion can fail if this test is run before -testAAALoadPacks or -testAddPack.");
+}
+
+@end