test: run index test by default

Running this test via "bash run" uncovered three different
bugs (4344, 4348, 4353).  We need to run it by default.

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6832043

test/index.go

-// $G $D/$F.go && $L $F.$A &&
-// ./$A.out -pass 0 >tmp.go && $G tmp.go && $L -o $A.out1 tmp.$A && ./$A.out1 &&
-// ./$A.out -pass 1 >tmp.go && errchk $G -e tmp.go &&
-// ./$A.out -pass 2 >tmp.go && errchk $G -e tmp.go
-// rm -f tmp.go $A.out1
-
-// NOTE: This test is not run by 'run.go' and so not run by all.bash.
-// To run this test you must use the ./run shell script.
+// skip
 
 // 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.
 
 // Generate test of index and slice bounds checks.
-// The output is compiled and run.
+// The actual tests are index0.go, index1.go, index2.go.
 
 package main
 
 import (
 	"bufio"
-	"flag"
 	"fmt"
 	"os"
 	"runtime"
@@ -155,14 +147,13 @@ func bug() {
 func main() {
 `
 
-// Passes:
+// pass variable set in index[012].go
 //	0 - dynamic checks
 //	1 - static checks of invalid constants (cannot assign to types)
 //	2 - static checks of array bounds
-var pass = flag.Int("pass", 0, "which test (0,1,2)")
 
 func testExpr(b *bufio.Writer, expr string) {
-	if *pass == 0 {
+	if pass == 0 {
 		fmt.Fprintf(b, "\ttest(func(){use(%s)}, %q)\n", expr, expr)
 	} else {
 		fmt.Fprintf(b, "\tuse(%s)  // ERROR \"index|overflow\"\n", expr)
@@ -172,12 +163,10 @@ func testExpr(b *bufio.Writer, expr string) {
 func main() {
 	b := bufio.NewWriter(os.Stdout)
 
-	flag.Parse()
-	
-	if *pass == 0 {
-		fmt.Fprint(b, "// $G $D/$F.go && $L $F.$A && ./$A.out\n\n")
+	if pass == 0 {
+		fmt.Fprint(b, "// run\n\n")
 	} else {
-		fmt.Fprint(b, "// errchk $G -e $D/$F.go\n\n")
+		fmt.Fprint(b, "// errorcheck\n\n")
 	}
 	fmt.Fprint(b, prolog)
 	
@@ -240,7 +229,7 @@ func main() {
 		}
 
 		// Only print the test case if it is appropriate for this pass.
-		if thisPass == *pass {
+		if thisPass == pass {
 			pae := p+a+e+big
 			cni := c+n+i
 			

test/index0.go

+// runoutput ./index.go
+
+// Copyright 2012 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.
+
+// Generate test of index and slice bounds checks.
+// The output is compiled and run.
+
+package main
+
+const pass = 0

test/index1.go

+// errorcheckoutput ./index.go
+
+// 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.
+
+// Generate test of index and slice bounds checks.
+// The output is error checked.
+
+package main
+
+const pass = 1

test/index2.go

+// errorcheckoutput ./index.go
+
+// 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.
+
+// Generate test of index and slice bounds checks.
+// The output is error checked.
+
+package main
+
+const pass = 2

test/run.go

@@ -128,7 +128,7 @@ func main() {
 		if !*verbose && test.err == nil {
 			continue
 		}
-		fmt.Printf("%-10s %-20s: %s\n", test.action, test.goFileName(), errStr)
+		fmt.Printf("%-20s %-20s: %s\n", test.action, test.goFileName(), errStr)
 	}
 
 	if *summary {
@@ -198,7 +198,7 @@ type test struct {
 	donec       chan bool // closed when done
 
 	src    string
-	action string // "compile", "build", "run", "errorcheck", "skip", "runoutput", "compiledir"
+	action string // "compile", "build", etc.
 
 	tempDir string
 	err     error
@@ -300,7 +300,7 @@ func (t *test) run() {
 		fallthrough
 	case "compile", "compiledir", "build", "run", "runoutput", "rundir":
 		t.action = action
-	case "errorcheck", "errorcheckdir":
+	case "errorcheck", "errorcheckdir", "errorcheckoutput":
 		t.action = action
 		wantError = true
 		for len(args) > 0 && strings.HasPrefix(args[0], "-") {
@@ -467,7 +467,7 @@ func (t *test) run() {
 
 	case "runoutput":
 		useTmp = false
-		out, err := runcmd("go", "run", t.goFileName())
+		out, err := runcmd(append([]string{"go", "run", t.goFileName()}, args...)...)
 		if err != nil {
 			t.err = err
 		}
@@ -484,6 +484,36 @@ func (t *test) run() {
 		if string(out) != t.expectedOutput() {
 			t.err = fmt.Errorf("incorrect output\n%s", out)
 		}
+
+	case "errorcheckoutput":
+		useTmp = false
+		out, err := runcmd(append([]string{"go", "run", t.goFileName()}, args...)...)
+		if err != nil {
+			t.err = err
+		}
+		tfile := filepath.Join(t.tempDir, "tmp__.go")
+		err = ioutil.WriteFile(tfile, out, 0666)
+		if err != nil {
+			t.err = fmt.Errorf("write tempfile:%s", err)
+			return
+		}
+		cmdline := []string{"go", "tool", gc, "-e", "-o", "a." + letter}
+		cmdline = append(cmdline, flags...)
+		cmdline = append(cmdline, tfile)
+		out, err = runcmd(cmdline...)
+		if wantError {
+			if err == nil {
+				t.err = fmt.Errorf("compilation succeeded unexpectedly\n%s", out)
+				return
+			}
+		} else {
+			if err != nil {
+				t.err = err
+				return
+			}
+		}
+		t.err = t.errorCheck(string(out), tfile, "tmp__.go")
+		return
 	}
 }
 

test/testlib

@@ -61,7 +61,7 @@ build() {
 }
 
 runoutput() {
-	go run "$D/$F.go" > tmp.go
+	go run "$D/$F.go" "$@" > tmp.go
 	go run tmp.go
 }
 
@@ -96,6 +96,16 @@ errorcheck() {
 	errchk $zero $G -e $* $D/$F.go
 }
 
+errorcheckoutput() {
+	zero=""
+	if [ "$1" = "-0" ]; then
+		zero="-0"
+		shift
+	fi
+	go run "$D/$F.go" "$@" > tmp.go
+	errchk $zero $G -e tmp.go
+}
+
 skip() {
 	true
 }