adding null cases

src/pg/test/sql/40_observatory_utility_test.sql

@@ -21,9 +21,16 @@ SELECT
 SELECT
   cdb_observatory.OBS_GeomTable(
     CDB_LatLng(40.7128,-74.0059),
-    '"us.census.tiger".nonexistant_id'
+    '"us.census.tiger".nonexistant_id' -- not in catalog
   );
 
+-- future test: give back nulls when geometry doesn't intersect
+-- SELECT
+--   cdb_observatory.OBS_GeomTable(
+--     CDB_LatLng(0,0), -- should give back null since it's in the ocean?
+--     '"us.census.tiger".census_tract'
+--   );
+
 -- OBS_GetColumnData
 -- should give back:
 --  colname   | tablename       | aggregate
@@ -38,6 +45,15 @@ SELECT
   ))).*
 ORDER BY 1 ASC;
 
+-- should be null-valued
+SELECT
+  (unnest(cdb_observatory.OBS_GetColumnData(
+    '"us.census.tiger".census_tract',
+    Array['"us.census.tiger".baloney'], -- entry not in catalog
+    '2009 - 2013'
+  ))).*
+ORDER BY 1 ASC;
+
 -- OBS_LookupCensusHuman
 -- should give back: {"\"us.census.acs\".B19083001"}
 SELECT
@@ -45,6 +61,12 @@ SELECT
     Array['gini_index']
   );
 
+-- should be empty array
+SELECT
+  cdb_observatory.OBS_LookupCensusHuman(
+    Array['cookies']
+  );
+
 -- OBS_BuildSnapshotQuery
 -- Should give back: SELECT  vals[1] As total_pop, vals[2] As male_pop, vals[3] As female_pop, vals[4] As median_age
 SELECT
@@ -52,4 +74,10 @@ SELECT
     Array['total_pop','male_pop','female_pop','median_age']
   );
 
+-- should give back: SELECT  vals[1] As mandarin_orange
+SELECT
+  cdb_observatory.OBS_BuildSnapshotQuery(
+    Array['mandarin_orange']
+  );
+
 \i test/sql/drop_fixtures.sql