Added more tests

src/build/errors/CompileErrors.go

@@ -1,6 +1,7 @@
 package errors
 
 var (
+	EmptySwitch          = &Base{"Empty switch"}
 	ExpectedIfBeforeElse = &Base{"Expected an 'if' block before 'else'"}
 	InvalidNumber        = &Base{"Invalid number"}
 	InvalidExpression    = &Base{"Invalid expression"}