Use placement constant in test.

Author: ryanslade

video_test.go

@@ -40,7 +40,7 @@ var _ = Describe("Video", func() {
 				{W: 300, H: 250, ID: "1234567893-1", Pos: AdPosAboveFold, BAttr: []int{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}, ExpDir: []int{ExpDirRight, ExpDirDown}},
 				{W: 728, H: 90, ID: "1234567893-2", Pos: AdPosAboveFold, BAttr: []int{CreativeAttributeUserInitiated, CreativeAttributeWindowsDialogOrAlert}},
 			},
-			Placement:     1,
+			Placement:     VideoPlacementInStream,
 			Api:           []int{APIFrameworkVPAID1, APIFrameworkVPAID2},
 			CompanionType: []int{VASTCompanionStatic, VASTCompanionHTML},
 		}))