Merge pull request #559 from ibpsa/issue554_forecastHorizon0

Closes #554

releasenotes.md

@@ -6,6 +6,7 @@ Released on xx/xx/xxxx.
 
 **The following changes are backwards-compatible and do not significantly change benchmark results:**
 
+- Allow forecast horizons of 0 to retrieve boundary condition data at current time like pricing or temperature setpoints. This is for [#554](https://github.com/ibpsa/project1-boptest/issues/554).
 - Update ``docs/tutorials/tutorial1_developer`` and ``docs/workshops/BS21Workshop_20210831``.  This is for [#532](https://github.com/ibpsa/project1-boptest/issues/532).
 - In examples and unit test Python requests, use ``json`` attribute instead of ``data``.  This is for [#528](https://github.com/ibpsa/project1-boptest/issues/528).
 - In unit test checking fetching of single forecast variable, specify specific forecast point to check for each test case.  This is for [#529](https://github.com/ibpsa/project1-boptest/issues/529).

testcase.py

@@ -859,10 +859,10 @@ def get_forecast(self, point_names, horizon, interval):
             message = "Invalid value {} for parameter interval. Value must be a float, integer, or string able to be converted to a float, but is {}.".format(interval, type(interval))
             logging.error(message)
             return status, message, payload
-        if horizon <= 0:
+        if horizon < 0:
             payload = None
             status = 400
-            message = "Invalid value {} for parameter horizon. Value must be positive.".format(horizon)
+            message = "Invalid value {} for parameter horizon. Value must not be negative.".format(horizon)
             logging.error(message)
             return status, message, payload
         if interval <= 0: