On Dec 18, 2009, at 2:46 pm, Tom Stuart wrote:
> Can you elaborate? From a position of no knowledge, the most obvious question
> to me is: why would I care about the state of O? Either the change in O's
> state is observable through its behaviour (in which case I specify that
> behaviour) or it's not (in which case I don't care).
The example given is for an auction sniper (S). So,
Given S has just notified one of its listeners that it's bidding
When S is informed that a bid has been made by a competitor
And the auction is closed
Then S should notify its listeners that it lost the auction
Given S has just notified one of its listeners that it's bidding
When S is informed that its bid is highest
And the auction is closed
Then S should notify its listeners that it won the auction
The last one looks like the code below in Java[1], but note this is further on
from the code in chapter 14.
Interestingly, writing it as GWT transforms the style of the expectations. eg,
"When S is informed that a bid has been made by a competitor"
replaces (something like)
Allow S to notify its listeners that it's in the bidding state
Am I making sense? Not sure if these examples capture the essense.
Ashley
@Test public void
reportsWonIfAuctionClosesWhenWinning() {
allowingSniperBidding();
allowingSniperWinning();
ignoringAuction();
context.checking(new Expectations() {{
atLeast(1).of(sniperListener).sniperStateChanged(
new SniperSnapshot(ITEM_ID, 135, 135, WON));
when(sniperState.is("winning"));
}});
sniper.currentPrice(123, 12, PriceSource.FromOtherBidder);
sniper.currentPrice(135, 45, PriceSource.FromSniper);
sniper.auctionClosed();
}
private void allowingSniperBidding() {
allowSniperStateChange(BIDDING, "bidding");
}
private void allowingSniperWinning() {
allowSniperStateChange(WINNING, "winning");
}
private void allowSniperStateChange(final SniperState newState, final String
oldState) {
context.checking(new Expectations() {{
allowing(sniperListener).sniperStateChanged(with(aSniperThatIs(newState)));
then(sniperState.is(oldState));
}});
}
[1]
http://github.com/sf105/goos-code/blob/master/test/unit/test/auctionsniper/AuctionSniperTest.java
--
http://www.patchspace.co.uk/
http://www.linkedin.com/in/ashleymoran
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