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diff --git a/dom/smil/test/db_smilCSSPaced.js b/dom/smil/test/db_smilCSSPaced.js
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+++ b/dom/smil/test/db_smilCSSPaced.js
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+/* -*- indent-tabs-mode: nil; js-indent-level: 4 -*- */
+/* vim: set shiftwidth=4 tabstop=4 autoindent cindent noexpandtab: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* testcase data for paced-mode animations of CSS properties */
+
+// Lists of testcases for re-use across multiple properties of the same type
+var _pacedTestLists = {
+  color: [
+    new AnimTestcasePaced(
+      "rgb(2,  4,  6); " + "rgb(4,  8, 12); " + "rgb(8, 16, 24)",
+      {
+        comp0: "rgb(2, 4, 6)",
+        comp1_6: "rgb(3, 6, 9)",
+        comp1_3: "rgb(4, 8, 12)",
+        comp2_3: "rgb(6, 12, 18)",
+        comp1: "rgb(8, 16, 24)",
+      }
+    ),
+    new AnimTestcasePaced(
+      "rgb(10, 10, 10); " + "rgb(20, 10, 8); " + "rgb(20, 30, 4)",
+      {
+        comp0: "rgb(10, 10, 10)",
+        comp1_6: "rgb(15, 10, 9)",
+        comp1_3: "rgb(20, 10, 8)",
+        comp2_3: "rgb(20, 20, 6)",
+        comp1: "rgb(20, 30, 4)",
+      }
+    ),
+    // Use the same RGB component values to make
+    // premultication effect easier to compute.
+    new AnimTestcasePaced(
+      "rgba(20, 40, 60, 0.2); " +
+        "rgba(20, 40, 60, 0.4); " +
+        "rgba(20, 40, 60, 0.8)",
+      {
+        comp0: "rgba(20, 40, 60, 0.2)",
+        comp1_6: "rgba(20, 40, 60, 0.3)",
+        comp1_3: "rgba(20, 40, 60, 0.4)",
+        comp2_3: "rgba(20, 40, 60, 0.6)",
+        comp1: "rgba(20, 40, 60, 0.8)",
+      }
+    ),
+  ],
+  currentColor_color: [
+    new AnimTestcasePaced(
+      "olive; " + // rgb(128, 128, 0)
+        "currentColor; " + // rgb(50, 50, 50)
+        "rgb(206, 150, 206)",
+      {
+        comp0: "rgb(128, 128, 0)",
+        comp1_6: "rgb(89, 89, 25)",
+        comp1_3: "rgb(50, 50, 50)",
+        comp2_3: "rgb(128, 100, 128)",
+        comp1: "rgb(206, 150, 206)",
+      }
+    ),
+  ],
+  currentColor_fill: [
+    // Bug 1467622 changed the distance calculation
+    // involving currentColor, comp values below
+    // are no longer evenly spaced.
+    new AnimTestcasePaced(
+      "olive; " + // rgb(128, 128, 0)
+        "currentColor; " + // rgb(50, 50, 50)
+        "rgb(206, 150, 206)",
+      {
+        comp0: "rgb(128, 128, 0)",
+        comp1_6: "rgb(98, 98, 19)",
+        comp1_3: "rgb(67, 67, 39)",
+        comp2_3: "rgb(115, 92, 115)",
+        comp1: "rgb(206, 150, 206)",
+      }
+    ),
+  ],
+  paintServer: [
+    // Sanity check: These aren't interpolatable -- they should end up
+    // ignoring the calcMode="paced" and falling into discrete-mode.
+    new AnimTestcasePaced(
+      "url(#gradA); url(#gradB)",
+      {
+        comp0: 'url("' + document.URL + '#gradA") rgb(0, 0, 0)',
+        comp1_6: 'url("' + document.URL + '#gradA") rgb(0, 0, 0)',
+        comp1_3: 'url("' + document.URL + '#gradA") rgb(0, 0, 0)',
+        comp2_3: 'url("' + document.URL + '#gradB") rgb(0, 0, 0)',
+        comp1: 'url("' + document.URL + '#gradB") rgb(0, 0, 0)',
+      },
+      "need support for URI-based paints"
+    ),
+    new AnimTestcasePaced(
+      "url(#gradA); url(#gradB); url(#gradC)",
+      {
+        comp0: 'url("' + document.URL + '#gradA") rgb(0, 0, 0)',
+        comp1_6: 'url("' + document.URL + '#gradA") rgb(0, 0, 0)',
+        comp1_3: 'url("' + document.URL + '#gradB") rgb(0, 0, 0)',
+        comp2_3: 'url("' + document.URL + '#gradC") rgb(0, 0, 0)',
+        comp1: 'url("' + document.URL + '#gradC") rgb(0, 0, 0)',
+      },
+      "need support for URI-based paints"
+    ),
+  ],
+  lengthNoUnits: [
+    new AnimTestcasePaced("2; 0; 4", {
+      comp0: "2px",
+      comp1_6: "1px",
+      comp1_3: "0px",
+      comp2_3: "2px",
+      comp1: "4px",
+    }),
+    new AnimTestcasePaced("10; 12; 8", {
+      comp0: "10px",
+      comp1_6: "11px",
+      comp1_3: "12px",
+      comp2_3: "10px",
+      comp1: "8px",
+    }),
+  ],
+  lengthPx: [
+    new AnimTestcasePaced("0px; 2px; 6px", {
+      comp0: "0px",
+      comp1_6: "1px",
+      comp1_3: "2px",
+      comp2_3: "4px",
+      comp1: "6px",
+    }),
+    new AnimTestcasePaced("10px; 12px; 8px", {
+      comp0: "10px",
+      comp1_6: "11px",
+      comp1_3: "12px",
+      comp2_3: "10px",
+      comp1: "8px",
+    }),
+  ],
+  lengthPctSVG: [
+    new AnimTestcasePaced("5%; 6%; 4%", {
+      comp0: "5%",
+      comp1_6: "5.5%",
+      comp1_3: "6%",
+      comp2_3: "5%",
+      comp1: "4%",
+    }),
+  ],
+  lengthPxPctSVG: [
+    new AnimTestcasePaced(
+      "0px; 1%; 6px",
+      {
+        comp0: "0px",
+        comp1_6: "1px",
+        comp1_3: "1%",
+        comp2_3: "4px",
+        comp1: "6px",
+      },
+      "need support for interpolating between " + "px and percent values"
+    ),
+  ],
+  opacity: [
+    new AnimTestcasePaced("0; 0.2; 0.6", {
+      comp0: "0",
+      comp1_6: "0.1",
+      comp1_3: "0.2",
+      comp2_3: "0.4",
+      comp1: "0.6",
+    }),
+    new AnimTestcasePaced("0.7; 1.0; 0.4", {
+      comp0: "0.7",
+      comp1_6: "0.85",
+      comp1_3: "1",
+      comp2_3: "0.7",
+      comp1: "0.4",
+    }),
+  ],
+  rect: [
+    new AnimTestcasePaced(
+      "rect(2px, 4px, 6px, 8px); " +
+        "rect(4px, 8px, 12px, 16px); " +
+        "rect(8px, 16px, 24px, 32px)",
+      {
+        comp0: "rect(2px, 4px, 6px, 8px)",
+        comp1_6: "rect(3px, 6px, 9px, 12px)",
+        comp1_3: "rect(4px, 8px, 12px, 16px)",
+        comp2_3: "rect(6px, 12px, 18px, 24px)",
+        comp1: "rect(8px, 16px, 24px, 32px)",
+      }
+    ),
+    new AnimTestcasePaced(
+      "rect(10px, 10px, 10px, 10px); " +
+        "rect(20px, 10px, 50px, 8px); " +
+        "rect(20px, 30px, 130px, 4px)",
+      {
+        comp0: "rect(10px, 10px, 10px, 10px)",
+        comp1_6: "rect(15px, 10px, 30px, 9px)",
+        comp1_3: "rect(20px, 10px, 50px, 8px)",
+        comp2_3: "rect(20px, 20px, 90px, 6px)",
+        comp1: "rect(20px, 30px, 130px, 4px)",
+      }
+    ),
+    new AnimTestcasePaced(
+      "rect(10px, auto, 10px, 10px); " +
+        "rect(20px, auto, 50px, 8px); " +
+        "rect(40px, auto, 130px, 4px)",
+      {
+        comp0: "rect(10px, auto, 10px, 10px)",
+        comp1_6: "rect(15px, auto, 30px, 9px)",
+        comp1_3: "rect(20px, auto, 50px, 8px)",
+        comp2_3: "rect(30px, auto, 90px, 6px)",
+        comp1: "rect(40px, auto, 130px, 4px)",
+      }
+    ),
+    // Paced-mode animation is not supported in these next few cases
+    // (Can't compute subcomponent distance between 'auto' & px-values)
+    new AnimTestcasePaced(
+      "rect(10px, 10px, 10px, auto); " +
+        "rect(20px, 10px, 50px, 8px); " +
+        "rect(20px, 30px, 130px, 4px)",
+      {
+        comp0: "rect(10px, 10px, 10px, auto)",
+        comp1_6: "rect(10px, 10px, 10px, auto)",
+        comp1_3: "rect(20px, 10px, 50px, 8px)",
+        comp2_3: "rect(20px, 30px, 130px, 4px)",
+        comp1: "rect(20px, 30px, 130px, 4px)",
+      }
+    ),
+    new AnimTestcasePaced(
+      "rect(10px, 10px, 10px, 10px); " +
+        "rect(20px, 10px, 50px, 8px); " +
+        "auto",
+      {
+        comp0: "rect(10px, 10px, 10px, 10px)",
+        comp1_6: "rect(10px, 10px, 10px, 10px)",
+        comp1_3: "rect(20px, 10px, 50px, 8px)",
+        comp2_3: "auto",
+        comp1: "auto",
+      }
+    ),
+    new AnimTestcasePaced(
+      "auto; " + "auto; " + "rect(20px, 30px, 130px, 4px)",
+      {
+        comp0: "auto",
+        comp1_6: "auto",
+        comp1_3: "auto",
+        comp2_3: "rect(20px, 30px, 130px, 4px)",
+        comp1: "rect(20px, 30px, 130px, 4px)",
+      }
+    ),
+    new AnimTestcasePaced("auto; auto; auto", {
+      comp0: "auto",
+      comp1_6: "auto",
+      comp1_3: "auto",
+      comp2_3: "auto",
+      comp1: "auto",
+    }),
+  ],
+};
+
+// TODO: test more properties here.
+var gPacedBundles = [
+  new TestcaseBundle(gPropList.clip, _pacedTestLists.rect),
+  new TestcaseBundle(
+    gPropList.color,
+    [].concat(_pacedTestLists.color, _pacedTestLists.currentColor_color)
+  ),
+  new TestcaseBundle(gPropList.direction, [
+    new AnimTestcasePaced("rtl; ltr; rtl"),
+  ]),
+  new TestcaseBundle(
+    gPropList.fill,
+    [].concat(
+      _pacedTestLists.color,
+      _pacedTestLists.currentColor_fill,
+      _pacedTestLists.paintServer
+    )
+  ),
+  new TestcaseBundle(
+    gPropList.font_size,
+    [].concat(_pacedTestLists.lengthNoUnits, _pacedTestLists.lengthPx, [
+      new AnimTestcasePaced("20%; 24%; 16%", {
+        comp0: "10px",
+        comp1_6: "11px",
+        comp1_3: "12px",
+        comp2_3: "10px",
+        comp1: "8px",
+      }),
+      new AnimTestcasePaced("0px; 4%; 6px", {
+        comp0: "0px",
+        comp1_6: "1px",
+        comp1_3: "2px",
+        comp2_3: "4px",
+        comp1: "6px",
+      }),
+    ])
+  ),
+  new TestcaseBundle(gPropList.font_size_adjust, [
+    new AnimTestcasePaced("0.2; 0.6; 0.8", {
+      comp0: "0.2",
+      comp1_6: "0.3",
+      comp1_3: "0.4",
+      comp2_3: "0.6",
+      comp1: "0.8",
+    }),
+    new AnimTestcasePaced("none; none; 0.5", {
+      comp0: "none",
+      comp1_6: "none",
+      comp1_3: "none",
+      comp2_3: "0.5",
+      comp1: "0.5",
+    }),
+  ]),
+  new TestcaseBundle(gPropList.font_family, [
+    // Sanity check: 'font-family' isn't interpolatable.  It should end up
+    // ignoring the calcMode="paced" and falling into discrete-mode.
+    new AnimTestcasePaced(
+      "serif; sans-serif; monospace",
+      {
+        comp0: "serif",
+        comp1_6: "serif",
+        comp1_3: "sans-serif",
+        comp2_3: "monospace",
+        comp1: "monospace",
+      },
+      "need support for more font properties"
+    ),
+  ]),
+  new TestcaseBundle(gPropList.opacity, _pacedTestLists.opacity),
+  new TestcaseBundle(
+    gPropList.stroke_dasharray,
+    [].concat(_pacedTestLists.lengthPctSVG, [
+      new AnimTestcasePaced("7, 7, 7; 7, 10, 3; 1, 2, 3", {
+        comp0: "7px, 7px, 7px",
+        comp1_6: "7px, 8.5px, 5px",
+        comp1_3: "7px, 10px, 3px",
+        comp2_3: "4px, 6px, 3px",
+        comp1: "1px, 2px, 3px",
+      }),
+    ])
+  ),
+  new TestcaseBundle(
+    gPropList.stroke_dashoffset,
+    [].concat(
+      _pacedTestLists.lengthNoUnits,
+      _pacedTestLists.lengthPx,
+      _pacedTestLists.lengthPctSVG,
+      _pacedTestLists.lengthPxPctSVG
+    )
+  ),
+  new TestcaseBundle(
+    gPropList.stroke_width,
+    [].concat(
+      _pacedTestLists.lengthNoUnits,
+      _pacedTestLists.lengthPx,
+      _pacedTestLists.lengthPctSVG,
+      _pacedTestLists.lengthPxPctSVG
+    )
+  ),
+];