1 files changed, 170 insertions, 0 deletions
diff --git a/devtools/client/shared/test/browser_graphs-06.js b/devtools/client/shared/test/browser_graphs-06.js
new file mode 100644
index 0000000000..b34d11e8ca
--- /dev/null
+++ b/devtools/client/shared/test/browser_graphs-06.js
@@ -0,0 +1,170 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests if clicking on regions adds a selection spanning that region.
+
+const TEST_DATA = [
+  { delta: 112, value: 48 },
+  { delta: 213, value: 59 },
+  { delta: 313, value: 60 },
+  { delta: 413, value: 59 },
+  { delta: 530, value: 59 },
+  { delta: 646, value: 58 },
+  { delta: 747, value: 60 },
+  { delta: 863, value: 48 },
+  { delta: 980, value: 37 },
+  { delta: 1097, value: 30 },
+  { delta: 1213, value: 29 },
+  { delta: 1330, value: 23 },
+  { delta: 1430, value: 10 },
+  { delta: 1534, value: 17 },
+  { delta: 1645, value: 20 },
+  { delta: 1746, value: 22 },
+  { delta: 1846, value: 39 },
+  { delta: 1963, value: 26 },
+  { delta: 2080, value: 27 },
+  { delta: 2197, value: 35 },
+  { delta: 2312, value: 47 },
+  { delta: 2412, value: 53 },
+  { delta: 2514, value: 60 },
+  { delta: 2630, value: 37 },
+  { delta: 2730, value: 36 },
+  { delta: 2830, value: 37 },
+  { delta: 2946, value: 36 },
+  { delta: 3046, value: 40 },
+  { delta: 3163, value: 47 },
+  { delta: 3280, value: 41 },
+  { delta: 3380, value: 35 },
+  { delta: 3480, value: 27 },
+  { delta: 3580, value: 39 },
+  { delta: 3680, value: 42 },
+  { delta: 3780, value: 49 },
+  { delta: 3880, value: 55 },
+  { delta: 3980, value: 60 },
+  { delta: 4080, value: 60 },
+  { delta: 4180, value: 60 },
+];
+const TEST_REGIONS = [
+  { start: 320, end: 460 },
+  { start: 780, end: 860 },
+];
+const LineGraphWidget = require("devtools/client/shared/widgets/LineGraphWidget");
+
+add_task(async function() {
+  await addTab("about:blank");
+  await performTest();
+  gBrowser.removeCurrentTab();
+});
+
+async function performTest() {
+  const { host, doc } = await createHost();
+  const graph = new LineGraphWidget(doc.body, "fps");
+  await graph.once("ready");
+
+  testGraph(graph);
+
+  await graph.destroy();
+  host.destroy();
+}
+
+function testGraph(graph) {
+  graph.setData(TEST_DATA);
+  graph.setRegions(TEST_REGIONS);
+
+  click(graph, (graph._regions[0].start + graph._regions[0].end) / 2);
+  is(
+    graph.getSelection().start,
+    graph._regions[0].start,
+    "The first region is now selected (1)."
+  );
+  is(
+    graph.getSelection().end,
+    graph._regions[0].end,
+    "The first region is now selected (2)."
+  );
+
+  let min = map(graph.getSelection().start, 0, graph.width, 112, 4180);
+  let max = map(graph.getSelection().end, 0, graph.width, 112, 4180);
+  is(
+    graph.getMappedSelection().min,
+    min,
+    "The mapped selection's min value is correct (1)."
+  );
+  is(
+    graph.getMappedSelection().max,
+    max,
+    "The mapped selection's max value is correct (2)."
+  );
+
+  click(graph, (graph._regions[1].start + graph._regions[1].end) / 2);
+  is(
+    graph.getSelection().start,
+    graph._regions[1].start,
+    "The second region is now selected (1)."
+  );
+  is(
+    graph.getSelection().end,
+    graph._regions[1].end,
+    "The second region is now selected (2)."
+  );
+
+  min = map(graph.getSelection().start, 0, graph.width, 112, 4180);
+  max = map(graph.getSelection().end, 0, graph.width, 112, 4180);
+  is(
+    graph.getMappedSelection().min,
+    min,
+    "The mapped selection's min value is correct (3)."
+  );
+  is(
+    graph.getMappedSelection().max,
+    max,
+    "The mapped selection's max value is correct (4)."
+  );
+
+  graph.setSelection({ start: graph.width, end: 0 });
+  min = map(0, 0, graph.width, 112, 4180);
+  max = map(graph.width, 0, graph.width, 112, 4180);
+  is(
+    graph.getMappedSelection().min,
+    min,
+    "The mapped selection's min value is correct (5)."
+  );
+  is(
+    graph.getMappedSelection().max,
+    max,
+    "The mapped selection's max value is correct (6)."
+  );
+
+  graph.setSelection({ start: graph.width + 100, end: -100 });
+  min = map(0, 0, graph.width, 112, 4180);
+  max = map(graph.width, 0, graph.width, 112, 4180);
+  is(
+    graph.getMappedSelection().min,
+    min,
+    "The mapped selection's min value is correct (7)."
+  );
+  is(
+    graph.getMappedSelection().max,
+    max,
+    "The mapped selection's max value is correct (8)."
+  );
+}
+
+/**
+ * Maps a value from one range to another.
+ */
+function map(value, istart, istop, ostart, ostop) {
+  return ostart + (ostop - ostart) * ((value - istart) / (istop - istart));
+}
+
+// EventUtils just doesn't work!
+
+function click(graph, x, y = 1) {
+  x /= window.devicePixelRatio;
+  y /= window.devicePixelRatio;
+  graph._onMouseMove({ testX: x, testY: y });
+  graph._onMouseDown({ testX: x, testY: y });
+  graph._onMouseUp({ testX: x, testY: y });
+}