Start adding unit tests

Makefile

@@ -1,3 +1,8 @@
-.PHONY: fmt
+.PHONY: fmt test
 fmt:
-	@ls | grep -E '\.(h|m)$$' | xargs clang-format -i
+	@ls | grep -E '\.(h|m)$$' | xargs clang-format -i
+
+test:
+	@go test -c . -o vz.test
+	@codesign --entitlements ./example/linux/vz.entitlements -s - ./vz.test || true
+	@./vz.test

go.mod

@@ -2,4 +2,13 @@ module github.com/Code-Hex/vz/v2
 
 go 1.17
 
-require golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664
+require (
+	github.com/stretchr/testify v1.8.0
+	golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664
+)
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -1,2 +1,17 @@
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0 h1:pSgiaMZlXftHpm5L7V1+rVB+AZJydKsMxsQBIJw4PKk=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664 h1:v1W7bwXHsnLLloWYTVEdvGvA7BHMeBYsPcF0GLDxIRs=
 golang.org/x/sys v0.0.0-20220808155132-1c4a2a72c664/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

virtualization_test.go

@@ -0,0 +1,84 @@
+package vz
+
+import (
+	"os"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+type testVM struct {
+	*VirtualMachine
+	tempKernelFile    *os.File
+	stateHandlerError func(err error)
+}
+
+func (vm *testVM) Close() error {
+	return vm.tempKernelFile.Close()
+}
+
+func newTestVM(t *testing.T) *testVM {
+	// use empty file as dummy kernel as we don't expect the VM to successfully start in our tests
+	tempKernelFile, err := os.CreateTemp(".", "vz_vmlinuz_test")
+	require.NoError(t, err)
+	bootloader := NewLinuxBootLoader(tempKernelFile.Name())
+	config := NewVirtualMachineConfiguration(bootloader, 1, 64*1024*1024)
+	//passing the config below to NewVirtualMachine reproduces https://github.com/Code-Hex/vz/issues/43
+	//config := NewVirtualMachineConfiguration(&LinuxBootLoader{}, 1, 64*1024*1024)
+
+	stateHandlerError := func(err error) {
+		require.Error(t, err)
+	}
+
+	return &testVM{
+		VirtualMachine:    NewVirtualMachine(config),
+		tempKernelFile:    tempKernelFile,
+		stateHandlerError: stateHandlerError,
+	}
+}
+
+func TestStart(t *testing.T) {
+	vm := newTestVM(t)
+	require.NotEqual(t, vm, nil)
+	defer vm.Close()
+
+	require.True(t, vm.CanStart())
+	vm.Start(vm.stateHandlerError)
+}
+
+func TestPause(t *testing.T) {
+	vm := newTestVM(t)
+	require.NotEqual(t, vm, nil)
+	defer vm.Close()
+
+	require.False(t, vm.CanPause())
+	vm.Pause(vm.stateHandlerError)
+}
+
+func TestResume(t *testing.T) {
+	vm := newTestVM(t)
+	require.NotEqual(t, vm, nil)
+	defer vm.Close()
+
+	require.False(t, vm.CanResume())
+	vm.Resume(vm.stateHandlerError)
+}
+
+func TestRequestStop(t *testing.T) {
+	vm := newTestVM(t)
+	require.NotEqual(t, vm, nil)
+	defer vm.Close()
+
+	require.False(t, vm.CanRequestStop())
+	_, err := vm.RequestStop()
+	require.Error(t, err)
+}
+
+func TestStop(t *testing.T) {
+	vm := newTestVM(t)
+	require.NotEqual(t, vm, nil)
+	defer vm.Close()
+
+	require.False(t, vm.CanStop())
+	vm.Stop(vm.stateHandlerError)
+}