1 // Copyright 2013 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 // This file checks invariants of token.Token ordering that we rely on 6 // since package go/token doesn't provide any guarantees at the moment. 7 8 package types 9 10 import ( 11 "go/token" 12 "testing" 13 ) 14 15 var assignOps = map[token.Token]token.Token{ 16 token.ADD_ASSIGN: token.ADD, 17 token.SUB_ASSIGN: token.SUB, 18 token.MUL_ASSIGN: token.MUL, 19 token.QUO_ASSIGN: token.QUO, 20 token.REM_ASSIGN: token.REM, 21 token.AND_ASSIGN: token.AND, 22 token.OR_ASSIGN: token.OR, 23 token.XOR_ASSIGN: token.XOR, 24 token.SHL_ASSIGN: token.SHL, 25 token.SHR_ASSIGN: token.SHR, 26 token.AND_NOT_ASSIGN: token.AND_NOT, 27 } 28 29 func TestZeroTok(t *testing.T) { 30 // zero value for token.Token must be token.ILLEGAL 31 var zero token.Token 32 if token.ILLEGAL != zero { 33 t.Errorf("%s == %d; want 0", token.ILLEGAL, zero) 34 } 35 } 36 37 func TestAssignOp(t *testing.T) { 38 // there are fewer than 256 tokens 39 for i := 0; i < 256; i++ { 40 tok := token.Token(i) 41 got := assignOp(tok) 42 want := assignOps[tok] 43 if got != want { 44 t.Errorf("for assignOp(%s): got %s; want %s", tok, got, want) 45 } 46 } 47 } 48
