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[Telemetry] Update subscription spec

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Update spec for TelemetrySubscription to account for the fact
that it initially calls back when the set of telemetry objects
is available (which supports views such as Fixed Position
which want to defer all telemetry-handling responsibility to
the subscription.) WTD-879.
This commit is contained in:
Victor Woeltjen 2015-02-19 09:11:59 -08:00
parent 035b2e36c3
commit 81159a8801
1 changed files with 19 additions and 5 deletions
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24
platform/telemetry/test/TelemetrySubscriptionSpec.js
View File

@ -76,7 +76,10 @@ define(
});
it("fires callbacks when subscriptions update", function () {
expect(mockCallback).not.toHaveBeenCalled();
// Callback fires when telemetry objects become available,
// so track initial call count instead of verifying that
// it hasn't been called at all.
var initialCalls = mockCallback.calls.length;
mockTelemetry.subscribe.mostRecentCall.args[0](mockSeries);
// This gets fired via a timeout, so trigger that
expect(mockTimeout).toHaveBeenCalledWith(
@ -86,12 +89,15 @@ define(
mockTimeout.mostRecentCall.args[0]();
// Should have triggered the callback to alert that
// new data was available
expect(mockCallback).toHaveBeenCalled();
expect(mockCallback.calls.length).toEqual(initialCalls + 1);
});
it("fires subscription callbacks once per cycle", function () {
var i;
// Verify precondition - one call for telemetryObjects
expect(mockCallback.calls.length).toEqual(1);
for (i = 0; i < 100; i += 1) {
mockTelemetry.subscribe.mostRecentCall.args[0](mockSeries);
}
@ -100,7 +106,7 @@ define(
call.args[0]();
});
// Should have only triggered the
expect(mockCallback.calls.length).toEqual(1);
expect(mockCallback.calls.length).toEqual(2);
});
it("reports its latest observed data values", function () {
@ -129,7 +135,8 @@ define(
// telemetrySubscription, where failure to callback
// once-per-update results in loss of data, WTD-784
it("fires one event per update if requested", function () {
var i, domains = [], ranges = [], lastCall;
var i, domains = [], ranges = [], lastCall, initialCalls;
// Clear out the subscription from beforeEach
subscription.unsubscribe();
@ -142,6 +149,9 @@ define(
true // Don't drop updates!
);
// Track calls at this point
initialCalls = mockCallback.calls.length;
// Snapshot getDomainValue, getRangeValue at time of callback
mockCallback.andCallFake(function () {
domains.push(subscription.getDomainValue(mockDomainObject));
@ -163,13 +173,17 @@ define(
}
// Should have only triggered the
expect(mockCallback.calls.length).toEqual(100);
expect(mockCallback.calls.length).toEqual(100 + initialCalls);
});
it("provides domain object metadata", function () {
expect(subscription.getMetadata()[0])
.toEqual(testMetadata);
});
it("fires callback when telemetry objects are available", function () {
expect(mockCallback.calls.length).toEqual(1);
});
});
}
);