Pass --expected-default-driver to the test rather than minikube

Improve VBoxManage detection on Windows

Add missing install_test

cmd/minikube/cmd/start.go

@@ -552,7 +552,7 @@ func selectDriver(oldConfig *cfg.Config) string {
 		}
 
 		if pick.Name == "" {
-			exit.WithCodeT(exit.Config, "Unable to determine a default driver to use. Try specifying --vm-driver, or visiting https://minikube.sigs.k8s.io/docs/start/")
+			exit.WithCodeT(exit.Config, "Unable to determine a default driver to use. Try specifying --vm-driver, or see https://minikube.sigs.k8s.io/docs/start/")
 		}
 
 		name = pick.Name

hack/jenkins/windows_integration_test_hyperv.ps1

@@ -19,7 +19,7 @@ gsutil.cmd -m cp -r gs://minikube-builds/$env:MINIKUBE_LOCATION/testdata .
 
 ./out/minikube-windows-amd64.exe delete
 
-out/e2e-windows-amd64.exe -minikube-start-args="--vm-driver=hyperv --expected-default-driver=hyperv --hyperv-virtual-switch=primary-virtual-switch" -binary=out/minikube-windows-amd64.exe -test.v -test.timeout=65m
+out/e2e-windows-amd64.exe --expected-default-driver=hyperv -minikube-start-args="--vm-driver=hyperv --hyperv-virtual-switch=primary-virtual-switch" -binary=out/minikube-windows-amd64.exe -test.v -test.timeout=65m
 $env:result=$lastexitcode
 # If the last exit code was 0->success, x>0->error
 If($env:result -eq 0){$env:status="success"}

pkg/minikube/driver/install_test.go

@@ -0,0 +1,45 @@
+/*
+Copyright 2019 The Kubernetes Authors All rights reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package driver
+
+import (
+	"testing"
+)
+
+func TestExtractVMDriverVersion(t *testing.T) {
+	v := extractVMDriverVersion("")
+	if len(v) != 0 {
+		t.Error("Expected empty string")
+	}
+
+	v = extractVMDriverVersion("random text")
+	if len(v) != 0 {
+		t.Error("Expected empty string")
+	}
+
+	expectedVersion := "1.2.3"
+
+	v = extractVMDriverVersion("version: v1.2.3")
+	if expectedVersion != v {
+		t.Errorf("Expected version: %s, got: %s", expectedVersion, v)
+	}
+
+	v = extractVMDriverVersion("version: 1.2.3")
+	if expectedVersion != v {
+		t.Errorf("Expected version: %s, got: %s", expectedVersion, v)
+	}
+}

pkg/minikube/registry/drvs/virtualbox/virtualbox.go

@@ -23,7 +23,6 @@ import (
 
 	"github.com/docker/machine/drivers/virtualbox"
 	"github.com/docker/machine/libmachine/drivers"
-	"github.com/pkg/errors"
 
 	"k8s.io/minikube/pkg/minikube/config"
 	"k8s.io/minikube/pkg/minikube/driver"
@@ -66,15 +65,26 @@ func configure(mc config.MachineConfig) interface{} {
 }
 
 func status() registry.State {
-	path, err := exec.LookPath("vboxmanage")
+	// Re-use this function as it's particularly helpful for Windows
+	tryPath := driver.VBoxManagePath()
+	path, err := exec.LookPath(tryPath)
 	if err != nil {
-		return registry.State{Error: errors.Wrap(err, "vboxmanage path check"), Fix: "Install VirtualBox", Doc: docURL}
+		return registry.State{
+			Error: fmt.Errorf("unable to find VBoxManage in $PATH"),
+			Fix:   "Install VirtualBox",
+			Doc:   docURL,
+		}
 	}
 
 	cmd := exec.Command(path, "list", "hostinfo")
 	out, err := cmd.CombinedOutput()
 	if err != nil {
-		return registry.State{Installed: true, Error: fmt.Errorf("%s failed:\n%s", strings.Join(cmd.Args, " "), out), Fix: "Install the latest version of VirtualBox", Doc: docURL}
+		return registry.State{
+			Installed: true,
+			Error:     fmt.Errorf("%s failed:\n%s", strings.Join(cmd.Args, " "), out),
+			Fix:       "Install the latest version of VirtualBox",
+			Doc:       docURL,
+		}
 	}
 
 	return registry.State{Installed: true, Healthy: true}