go version go1.10.2 windows/amd64

set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\egon\AppData\Local\go-build
set GOEXE=.exe
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOOS=windows
set GOPATH=C:\aa
set GORACE=
set GOROOT=C:\Go
set GOTMPDIR=
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GCCGO=gccgo
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\egon\AppData\Local\Temp\go-build861229170=/tmp/go-build -gno-record-gcc-switches

package cvr

type X struct {
	Y int
}

package cvr

import (
	"encoding/xml"
	"testing"
)

func TestX(t *testing.T) {
	xml.Marshal(&X{})
// check output of Marshal
}

cvr    0.032s  coverage: 0.0% of statements

package cvr

type X struct {
	Y int
}

func Z() int {
	return 5
}

package cvr

import (
	"encoding/xml"
	"testing"
)

func TestX(t *testing.T) {
	xml.Marshal(&X{})
	Z()
}

cvr    0.021s  coverage: 100.0% of statements