| // run |
| |
| // Copyright 2010 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| // Test of recover for run-time errors. |
| |
| // TODO(rsc): |
| // null pointer accesses |
| |
| package main |
| |
| import "strings" |
| |
| var x = make([]byte, 10) |
| |
| func main() { |
| test1() |
| test2() |
| test3() |
| test4() |
| test5() |
| test6() |
| test7() |
| } |
| |
| func mustRecover(s string) { |
| v := recover() |
| if v == nil { |
| panic("expected panic") |
| } |
| if e := v.(error).Error(); strings.Index(e, s) < 0 { |
| panic("want: " + s + "; have: " + e) |
| } |
| } |
| |
| func test1() { |
| defer mustRecover("index") |
| println(x[123]) |
| } |
| |
| func test2() { |
| defer mustRecover("slice") |
| println(x[5:15]) |
| } |
| |
| func test3() { |
| defer mustRecover("slice") |
| var lo = 11 |
| var hi = 9 |
| println(x[lo:hi]) |
| } |
| |
| func test4() { |
| defer mustRecover("interface") |
| var x interface{} = 1 |
| println(x.(float32)) |
| } |
| |
| type T struct { |
| a, b int |
| c []int |
| } |
| |
| func test5() { |
| defer mustRecover("uncomparable") |
| var x T |
| var z interface{} = x |
| println(z != z) |
| } |
| |
| func test6() { |
| defer mustRecover("unhashable type main.T") |
| var x T |
| var z interface{} = x |
| m := make(map[interface{}]int) |
| m[z] = 1 |
| } |
| |
| func test7() { |
| defer mustRecover("divide by zero") |
| var x, y int |
| println(x / y) |
| } |