token_test.go

Documentation: go/types

		 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
View as plain text