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author | Russ Cox <rsc@golang.org> | 2010-04-01 22:31:27 -0700 |
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committer | Russ Cox <rsc@golang.org> | 2010-04-01 22:31:27 -0700 |
commit | f75d0d224f1da1781f59bc9e836f8220130747a9 (patch) | |
tree | 798bf99d5ad5c793c64312e6730c6e51768e3ed2 /test/recover2.go | |
parent | d6589377c6e48af1990ada22ea47e1bd131c5f62 (diff) | |
download | go-f75d0d224f1da1781f59bc9e836f8220130747a9.tar.gz go-f75d0d224f1da1781f59bc9e836f8220130747a9.zip |
runtime: turn run time errors checks into panics
R=ken2, r
CC=golang-dev
https://golang.org/cl/871042
Diffstat (limited to 'test/recover2.go')
-rw-r--r-- | test/recover2.go | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/test/recover2.go b/test/recover2.go new file mode 100644 index 0000000000..96d591a15b --- /dev/null +++ b/test/recover2.go @@ -0,0 +1,86 @@ +// $G $D/$F.go && $L $F.$A && ./$A.out + +// 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): +// integer divide by zero? +// null pointer accesses + +package main + +import ( + "os" + "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.(os.Error).String(); 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") + println(x[11:9]) +} + +func test4() { + defer mustRecover("interface") + var x interface{} = 1 + println(x.(float)) +} + +type T struct { + a, b int +} + +func test5() { + defer mustRecover("uncomparable") + var x T + var z interface{} = x + println(z != z) +} + +func test6() { + defer mustRecover("unhashable") + var x T + var z interface{} = x + m := make(map[interface{}]int) + m[z] = 1 +} + +func test7() { + defer mustRecover("complex divide by zero") + var x, y complex + println(x / y) +} |