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Start downloading images when multiplex node is displayed

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fixes #178
This commit is contained in:
Ryan Nystrom
2015-01-07 16:18:48 -08:00
parent bacfcbd24d
commit ae1349eb16
3 changed files with 25 additions and 44 deletions
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16
AsyncDisplayKitTests/ASMultiplexImageNodeTests.m
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@@ -108,6 +108,7 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
[[[mockDataSource expect] andReturn:testImage] multiplexImageNode:imageNode imageForImageIdentifier:imageIdentifier];
imageNode.imageIdentifiers = @[imageIdentifier];
[imageNode reloadImageIdentifierSources];
[mockDataSource verify];
@@ -153,8 +154,9 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
completionBlock([self _testImage].CGImage);
}] fetchCachedImageWithURL:[OCMArg any] callbackQueue:[OCMArg any] completion:[OCMArg any]];
// Kick off loading.
imageNode.imageIdentifiers = @[imageIdentifier];
// Kick off loading.
[imageNode reloadImageIdentifierSources];
// Verify the data source.
[mockDataSource verify];
@@ -189,6 +191,7 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
}] multiplexImageNode:[OCMArg any] imageForImageIdentifier:[OCMArg any]];
imageNode.imageIdentifiers = @[highResIdentifier];
[imageNode reloadImageIdentifierSources];
// At this point, we should have the high-res identifier loaded and the DS should have been hit once.
XCTAssertEqualObjects(imageNode.loadedImageIdentifier, highResIdentifier, @"High res identifier should be loaded.");
@@ -197,10 +200,11 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
// Add the low res identifier.
NSNumber *lowResIdentifier = @1;
imageNode.imageIdentifiers = @[highResIdentifier, lowResIdentifier];
[imageNode reloadImageIdentifierSources];
// At this point the high-res should still be loaded, and the data source should not have been hit.
// At this point the high-res should still be loaded, and the data source should have been hit again
XCTAssertEqualObjects(imageNode.loadedImageIdentifier, highResIdentifier, @"High res identifier should be loaded.");
XCTAssertTrue(dataSourceHits == 1, @"Unexpected DS hit count");
XCTAssertTrue(dataSourceHits == 2, @"Unexpected DS hit count");
imageNode.delegate = nil;
imageNode.dataSource = nil;
@@ -226,6 +230,7 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
}] multiplexImageNode:[OCMArg any] imageForImageIdentifier:[OCMArg any]];
imageNode.imageIdentifiers = @[lowResIdentifier];
[imageNode reloadImageIdentifierSources];
// At this point, we should have the low-res identifier loaded and the DS should have been hit once.
XCTAssertEqualObjects(imageNode.loadedImageIdentifier, lowResIdentifier, @"Low res identifier should be loaded.");
@@ -234,6 +239,7 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
// Add the low res identifier.
NSNumber *highResIdentifier = @2;
imageNode.imageIdentifiers = @[highResIdentifier, lowResIdentifier];
[imageNode reloadImageIdentifierSources];
// At this point the high-res should be loaded, and the data source should been hit twice.
XCTAssertEqualObjects(imageNode.loadedImageIdentifier, highResIdentifier, @"High res identifier should be loaded.");
@@ -282,6 +288,7 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
}] multiplexImageNode:[OCMArg any] imageForImageIdentifier:[OCMArg any]];
imageNode.imageIdentifiers = imageIdentifiers;
[imageNode reloadImageIdentifierSources];
XCTAssertTrue(loadedImageCount == identifierCount, @"Expected to load the same number of identifiers we supplied");
@@ -331,8 +338,9 @@ static BOOL ASRunRunLoopUntilBlockIsTrue(BOOL (^block)())
[[mockDelegate expect] multiplexImageNode:imageNode didUpdateImage:[OCMArg any] withIdentifier:imageIdentifier fromImage:nil withIdentifier:nil];
imageNode.delegate = mockDelegate;
// Kick off loading.
imageNode.imageIdentifiers = @[imageIdentifier];
// Kick off loading.
[imageNode reloadImageIdentifierSources];
// Wait until the image is loaded.
ASRunRunLoopUntilBlockIsTrue(^BOOL{