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// Copyright 2020 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package kconfig
import (
"fmt"
"strings"
"testing"
"github.com/google/syzkaller/pkg/debugtracer"
"github.com/google/syzkaller/sys/targets"
"github.com/stretchr/testify/assert"
)
func TestMinimize(t *testing.T) {
const (
kconfig = `
mainmenu "test"
config A
config B
config C
config D
config I
config S
menuconfig HAMRADIO
depends on NET && !S390
bool "Amateur Radio support"
config AX25
tristate "Amateur Radio AX.25 Level 2 protocol"
depends on HAMRADIO
config ROSE
tristate "Amateur Radio X.25 PLP (Rose)"
depends on AX25
`
baseConfig = `
CONFIG_A=y
CONFIG_I=1
`
fullConfig = `
CONFIG_A=y
CONFIG_B=y
CONFIG_C=y
CONFIG_D=y
CONFIG_I=42
CONFIG_S="foo"
CONFIG_HAMRADIO=y
CONFIG_AX25=y
CONFIG_ROSE=y
`
)
type Test struct {
pred func(*ConfigFile) (bool, error)
result string
}
tests := []Test{
{
pred: func(cf *ConfigFile) (bool, error) {
return true, nil
},
result: baseConfig,
},
{
pred: func(cf *ConfigFile) (bool, error) {
return false, nil
},
result: fullConfig,
},
{
pred: func(cf *ConfigFile) (bool, error) {
return cf.Value("C") != No, nil
},
result: `
CONFIG_A=y
CONFIG_I=42
CONFIG_S="foo"
CONFIG_C=y
`,
},
{
pred: func(cf *ConfigFile) (bool, error) {
return cf.Value("HAMRADIO") == Yes && cf.Value("AX25") == Yes && cf.Value("ROSE") == Yes, nil
},
result: `
CONFIG_A=y
CONFIG_I=42
CONFIG_S="foo"
CONFIG_AX25=y
CONFIG_HAMRADIO=y
CONFIG_ROSE=y
`,
},
{
// Check if it works fine with several diffs.
pred: func(cf *ConfigFile) (bool, error) {
return cf.Value("D") != No && cf.Value("C") != No, nil
},
result: `
CONFIG_A=y
CONFIG_I=42
CONFIG_S="foo"
CONFIG_C=y
CONFIG_D=y
`,
},
}
kconf, err := ParseData(targets.Get("linux", "amd64"), []byte(kconfig), "kconf")
if err != nil {
t.Fatal(err)
}
base, err := ParseConfigData([]byte(baseConfig), "base")
if err != nil {
t.Fatal(err)
}
full, err := ParseConfigData([]byte(fullConfig), "full")
if err != nil {
t.Fatal(err)
}
for i, test := range tests {
t.Run(fmt.Sprint(i), func(t *testing.T) {
res, err := kconf.Minimize(base, full, test.pred, 0, &debugtracer.TestTracer{T: t})
if err != nil {
t.Fatal(err)
}
result := string(res.Serialize())
assert.ElementsMatch(t,
strings.Split(result, "\n"),
strings.Split(test.result, "\n"))
})
}
}
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