Added a test for mercator edge case

testing/vcs/CMakeLists.txt

@@ -737,5 +737,12 @@ cdat_add_test(vcs_test_click_info
   ${BASELINE_DIR}/test_vcs_click_info.png
 )
 
+cdat_add_test(vcs_test_mercator_edge
+  "${PYTHON_EXECUTABLE}"
+  ${cdat_SOURCE_DIR}/testing/vcs/test_vcs_mercator_edge.py
+  ${BASELINE_DIR}/test_vcs_mercator_edge.png
+)
+
+
 add_subdirectory(vtk_ui)
 add_subdirectory(editors)

testing/vcs/test_vcs_mercator_edge.py

@@ -0,0 +1,21 @@
+import vcs,cdms2
+import os,sys
+f = cdms2.open(os.path.join(vcs.sample_data, "clt.nc"))
+s = f("clt")
+x = vcs.init()
+iso = x.createisofill()
+iso.projection = "mercator"
+x.plot(s(latitude=(-90, 90)), iso)
+
+# Load the image testing module:
+testingDir = os.path.join(os.path.dirname(__file__), "..")
+sys.path.append(testingDir)
+import checkimage
+
+# Create the test image and compare:
+baseline = sys.argv[1]
+testFile = "test_vcs_mercator_edge.png"
+x.png(testFile)
+ret = checkimage.check_result_image(testFile, baseline,
+                                    checkimage.defaultThreshold)
+sys.exit(ret)