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|
package bincover
import (
"fmt"
"io/ioutil"
"os"
"reflect"
"testing"
"github.com/stretchr/testify/require"
)
func TestRunTest(t *testing.T) {
type args struct {
f func()
}
tests := []struct {
name string
args args
argsFile *os.File
wantOutput string
wantArgs []string
wantPanic bool
wantOutputPattern string
}{
{
name: "succeed running test",
args: args{f: func() {
fmt.Println("The worst thing about prison was the Dementors")
}},
argsFile: func() *os.File {
f := tempFileWithContent(t, "first\nsecond\nthird\n")
return f
}(),
wantArgs: []string{"first", "second", "third"},
wantOutput: "The worst thing about prison was the Dementors\n" +
startOfMetadataMarker + "\n{\"cover_mode\":\"" + testing.CoverMode() + "\",\"exit_code\":0}\n" + endOfMetadataMarker + "\n",
},
{
name: "fail running test when error parsing args file",
args: args{f: func() {
fmt.Println("Well, well, well, how the turntables")
}},
argsFile: func() *os.File {
f := removedTempFile(t)
return f
}(),
wantArgs: []string{},
wantPanic: true,
},
{
name: "succeed running panicking binary",
args: args{f: func() {
panic("I am Beyonce, always")
}},
argsFile: func() *os.File {
return tempFile(t)
}(),
wantOutputPattern: "panic: I am Beyonce, always\ngoroutine [\\d]+[\\s\\S]+" +
startOfMetadataMarker + "\n{\"cover_mode\":\"" + testing.CoverMode() + "\",\"exit_code\":1}\n" + endOfMetadataMarker + "\n",
wantArgs: []string{},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
defer os.Remove(tt.argsFile.Name())
s := tt.argsFile.Name()
argsFilename = &s
resetArgsFileName := func() {
var empty string
argsFilename = &empty
}
defer resetArgsFileName()
oldStdout := os.Stdout
defer func() { os.Stdout = oldStdout }()
tempStdout := tempFile(t)
defer os.Remove(tempStdout.Name())
os.Stdout = tempStdout
if tt.wantPanic {
require.Panics(t, func() { RunTest(tt.args.f) })
} else {
RunTest(tt.args.f)
}
_, err := tempStdout.Seek(0, 0)
require.NoError(t, err)
buf, err := ioutil.ReadAll(tempStdout)
require.NoError(t, err)
if tt.wantOutputPattern != "" {
require.Regexp(t, tt.wantOutputPattern, string(buf))
} else {
require.Equal(t, tt.wantOutput, string(buf))
}
require.Equal(t, tt.wantArgs, os.Args[len(os.Args)-len(tt.wantArgs):])
})
}
}
func Test_parseCustomArgs(t *testing.T) {
tests := []struct {
name string
argsFile *os.File
want []string
wantErr bool
}{
{
name: "succeed parsing args",
argsFile: func() *os.File {
return tempFileWithContent(t, "first\nsecond\nthird\n")
}(),
want: []string{"first", "second", "third"},
wantErr: false,
},
{
name: "fail parsing args when error reading from args file",
argsFile: func() *os.File {
return removedTempFile(t)
}(),
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
defer os.Remove(tt.argsFile.Name())
s := tt.argsFile.Name()
argsFilename = &s
resetArgsFileName := func() {
var empty string
argsFilename = &empty
}
defer resetArgsFileName()
got, err := parseCustomArgs()
if (err != nil) != tt.wantErr {
t.Errorf("parseCustomArgs() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("parseCustomArgs() got = %v, want %v", got, tt.want)
}
})
}
}
func Test_printMetadata(t *testing.T) {
type args struct {
metadata *testMetadata
}
tests := []struct {
name string
args args
wantOutput string
}{
{
name: "succeed printing metadata",
args: args{
metadata: &testMetadata{
CoverMode: "set",
ExitCode: 0,
}},
wantOutput: startOfMetadataMarker + "\n{\"cover_mode\":\"set\",\"exit_code\":0}\n" + endOfMetadataMarker + "\n",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
oldStdout := os.Stdout
defer func() { os.Stdout = oldStdout }()
tempStdout := tempFile(t)
defer os.Remove(tempStdout.Name())
os.Stdout = tempStdout
printMetadata(tt.args.metadata)
_, err := tempStdout.Seek(0, 0)
require.NoError(t, err)
buf, err := ioutil.ReadAll(tempStdout)
require.NoError(t, err)
require.Equal(t, tt.wantOutput, string(buf))
})
}
}
|
