RHINENG-21424: update test for null filter operator

Author: MichaelMraka

manager/controllers/filter_test.go

@@ -14,6 +14,7 @@ var testFilters = []string{
 	"gt:13",
 	"lt:12",
 	"between:12,13",
+	"null:",
 }
 
 func dummyParser(v string) (interface{}, error) {
@@ -22,7 +23,7 @@ func dummyParser(v string) (interface{}, error) {
 
 func TestFilterParse(t *testing.T) {
 	operators := []string{
-		"eq", "in", "gt", "lt", "between",
+		"eq", "in", "gt", "lt", "between", "null",
 	}
 
 	values := [][]string{
@@ -31,6 +32,7 @@ func TestFilterParse(t *testing.T) {
 		{"13"},
 		{"12"},
 		{"12", "13"},
+		{""},
 	}
 
 	for i, f := range testFilters {
@@ -47,6 +49,7 @@ func TestFilterToSql(t *testing.T) {
 		"test > ? ",
 		"test < ? ",
 		"test BETWEEN ? AND ? ",
+		"test IS NULL ",
 	}
 
 	for i, f := range testFilters {
@@ -66,6 +69,7 @@ func TestFilterToSqlAdvanced(t *testing.T) {
 		"(NOT test) > ? ",
 		"(NOT test) < ? ",
 		"(NOT test) BETWEEN ? AND ? ",
+		"(NOT test) IS NULL ",
 	}
 
 	for i, f := range testFilters {