[Plot] Add placeholder specs

Add placeholder specs for new scripts introduced to support
merging real-time and historical telemetry, WTD-806.

platform/features/plot/test/elements/PlotLineSpec.js

@@ -0,0 +1,12 @@
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
+define(
+    ["../../src/elements/PlotLine"],
+    function (PlotLine) {
+        "use strict";
+
+        describe("A plot line", function () {
+
+        });
+    }
+);

platform/features/plot/test/elements/PlotSeriesWindowSpec.js

@@ -0,0 +1,12 @@
+/*global define,Promise,describe,it,expect,beforeEach,waitsFor,jasmine*/
+
+define(
+    ["../../src/elements/PlotSeriesWindow"],
+    function (PlotSeriesWindow) {
+        "use strict";
+
+        describe("A plot's window on a telemetry series", function () {
+
+        });
+    }
+);

platform/features/plot/test/suite.json

@@ -6,12 +6,14 @@
     "SubPlot",
     "SubPlotFactory",
     "elements/PlotAxis",
+    "elements/PlotLine",
     "elements/PlotLineBuffer",
     "elements/PlotPalette",
     "elements/PlotPanZoomStack",
     "elements/PlotPanZoomStackGroup",
     "elements/PlotPosition",
     "elements/PlotPreparer",
+    "elements/PlotSeriesWindow",
     "elements/PlotTickGenerator",
     "elements/PlotUpdater",
     "modes/PlotModeOptions",