Lowest Points test

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Tool Tested: Lowest Points Test Name: LowestPointsTestCase.testLowestPointsSimple

Test #1 Case Description

Feature: Simple Test for Lowest Points

  Scenario: Run a simple version of Lowest Points
     Given we run Lowest Points
      When the Input Area is a polygon
      When the Input Surface is a GRID
          Then we can test to see if the featureclass has been created
	  Then we can test to see if the expected amount of features are created

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Test #2 Case Description

Feature: Simple Test for Lowest Points no input area

  Scenario: Run a simple version of Lowest Points but forget to specify area
     Given we run Lowest Points
      When the Input Area is not specified
      When the Input Surface is a GRID
          Then we can test to see if an error message is returned specifying that an input area is required

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#### Test Case Location
https://github.com/Esri/military-tools-geoprocessing-toolbox/blob/dev/utils/test/visibility_tests/LowestPointsTestCase.py

#### Test Data Location
https://github.com/Esri/military-tools-geoprocessing-toolbox/testdata/Elevation/Source


#### Future Test Ideas

* Check for input area not completely covered by DEM
* Check for multiple input areas
* Check for multiple input raster types
* Check for input TIN rather than raster