Added more tests

Author: cmaglie

constraints_test.go

@@ -99,6 +99,9 @@ func TestConstraintsParser(t *testing.T) {
 	good := []goodStringTest{
 		{"", ""}, // always true
 		{"=1.3.0", "=1.3.0"},
+		{"!=1.3.0", "!(=1.3.0)"},
+		{" !=1.3.0", "!(=1.3.0)"},
+		{"! =1.3.0", "!(=1.3.0)"},
 		{"1.3.0", "^1.3.0"},
 		{"!1.0.0", "!(^1.0.0)"},
 		{" =1.3.0 ", "=1.3.0"},
@@ -143,6 +146,8 @@ func TestConstraintsParser(t *testing.T) {
 		{"(>1.0.0) || =2.0.0", "(>1.0.0 || =2.0.0)"},
 		{">1.0.0 || (2.0.0)", "(>1.0.0 || ^2.0.0)"},
 		{">1.0.0 || (=2.0.0)", "(>1.0.0 || =2.0.0)"},
+		{"!>1.0.0 || (=2.0.0)", "(!(>1.0.0) || =2.0.0)"},
+		{"!(>1.0.0 || =2.0.0)", "!(>1.0.0 || =2.0.0)"},
 		{"((>1.0.0) || (2.0.0))", "(>1.0.0 || ^2.0.0)"},
 		{"((>1.0.0) || (=2.0.0))", "(>1.0.0 || =2.0.0)"},
 	}
@@ -159,6 +164,7 @@ func TestConstraintsParser(t *testing.T) {
 
 	bad := []string{
 		"= 1.0.0",
+		"!= 1.3.9",
 		">= 1.0.0",
 		"> 1.0.0",
 		"<= 1.0.0",