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mirror of https://github.com/golang/go synced 2024-11-11 22:20:22 -07:00

test: add a field tracking test

Now that we can set experiments at build time instead of make.bash time,
we can actually write a test for field tracking!

Update #20014

This CL contains a test for the functionality fixed in CL 312069.

Change-Id: I7569a7057bbc7c88ae25ae7bf974b0c8a4e35be8
Reviewed-on: https://go-review.googlesource.com/c/go/+/312217
Trust: Keith Randall <khr@golang.org>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
This commit is contained in:
Keith Randall 2021-04-21 10:54:13 -07:00
parent 35806efda2
commit 255056395e
4 changed files with 88 additions and 0 deletions

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// Copyright 2021 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.
package a
type T struct {
X int `go:"track"`
Y int `go:"track"`
Z int // untracked
}
func (t *T) GetX() int {
return t.X
}
func (t *T) GetY() int {
return t.Y
}
func (t *T) GetZ() int {
return t.Z
}

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// Copyright 2021 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.
package main
import (
"strings"
"issue20014.dir/a"
)
func main() {
samePackage()
crossPackage()
// Print fields registered with field tracking.
for _, line := range strings.Split(fieldTrackInfo, "\n") {
if line == "" {
continue
}
println(strings.Split(line, "\t")[0])
}
}
type T struct {
X int `go:"track"`
Y int `go:"track"`
Z int // untracked
}
func (t *T) GetX() int {
return t.X
}
func (t *T) GetY() int {
return t.Y
}
func (t *T) GetZ() int {
return t.Z
}
func samePackage() {
var t T
println(t.GetX())
println(t.GetZ())
}
func crossPackage() {
var t a.T
println(t.GetX())
println(t.GetZ())
}
// This global variable is set by the linker using the -k option.
var fieldTrackInfo string

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// runindir -goexperiment fieldtrack -ldflags -k=main.fieldTrackInfo
// Copyright 2021 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.
package ignored

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0
0
0
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main.T.X
issue20014.dir/a.T.X