test(proto): cover driver service surface

Asserts the eight v0.1 RPCs are exactly the ones present and
that message fields round-trip through generated getters.

proto/driverpb/driver_test.go

@@ -0,0 +1,61 @@
+package driverpb
+
+import (
+	"testing"
+
+	"google.golang.org/grpc"
+)
+
+func TestDriverServiceDescriptor(t *testing.T) {
+	var sd grpc.ServiceDesc = Driver_ServiceDesc
+	if sd.ServiceName != "uatu.driver.v1.Driver" {
+		t.Fatalf("unexpected service name: %q", sd.ServiceName)
+	}
+
+	want := map[string]bool{
+		"Launch":      true,
+		"Terminate":   true,
+		"Tap":         true,
+		"InputText":   true,
+		"Screenshot":  true,
+		"Hierarchy":   true,
+		"WaitForIdle": true,
+		"Health":      true,
+	}
+	got := map[string]bool{}
+	for _, m := range sd.Methods {
+		got[m.MethodName] = true
+	}
+	for name := range want {
+		if !got[name] {
+			t.Errorf("missing method %q in service", name)
+		}
+	}
+	for name := range got {
+		if !want[name] {
+			t.Errorf("unexpected method %q in service", name)
+		}
+	}
+}
+
+func TestMessageFields(t *testing.T) {
+	lr := &LaunchRequest{BundleId: "com.example", ClearState: true}
+	if lr.GetBundleId() != "com.example" || !lr.GetClearState() {
+		t.Fatalf("LaunchRequest field round-trip failed: %+v", lr)
+	}
+
+	tap := &Point{X: 10, Y: 20}
+	if tap.GetX() != 10 || tap.GetY() != 20 {
+		t.Fatalf("Point field round-trip failed: %+v", tap)
+	}
+
+	img := &Image{Png: []byte{1, 2, 3}, Width: 100, Height: 200}
+	if len(img.GetPng()) != 3 || img.GetWidth() != 100 || img.GetHeight() != 200 {
+		t.Fatalf("Image field round-trip failed: %+v", img)
+	}
+
+	hs := &HealthStatus{Ready: true, Version: "0.0.1", Platform: "android"}
+	if !hs.GetReady() || hs.GetVersion() != "0.0.1" || hs.GetPlatform() != "android" {
+		t.Fatalf("HealthStatus field round-trip failed: %+v", hs)
+	}
+}