1 files changed, 217 insertions, 0 deletions
diff --git a/devtools/client/shared/test/xpcshell/test_linearEasing.js b/devtools/client/shared/test/xpcshell/test_linearEasing.js
new file mode 100644
index 0000000000..66e487e17b
--- /dev/null
+++ b/devtools/client/shared/test/xpcshell/test_linearEasing.js
@@ -0,0 +1,217 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+// Tests methods from the LinearEasingWidget module
+
+const {
+  LinearEasingFunctionWidget,
+  parseTimingFunction,
+} = require("resource://devtools/client/shared/widgets/LinearEasingFunctionWidget.js");
+
+add_task(function testParseTimingFunction() {
+  info("test parseTimingFunction");
+
+  for (const test of ["ease", "linear", "ease-in", "ease-out", "ease-in-out"]) {
+    ok(!parseTimingFunction(test), `"${test}" is not valid`);
+  }
+
+  ok(!parseTimingFunction("something"), "non-function token");
+  ok(!parseTimingFunction("something()"), "non-linear function");
+  ok(
+    !parseTimingFunction(
+      "linear(something)",
+      "linear with non-numeric argument"
+    )
+  );
+
+  ok(!parseTimingFunction("linear(0)", "linear with only 1 point"));
+
+  deepEqual(
+    parseTimingFunction("linear(0, 0.5, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0.5, output: 0.5 },
+      { input: 1, output: 1 },
+    ],
+    "correct invocation"
+  );
+  deepEqual(
+    parseTimingFunction("linear(0, 0.5 /* mid */, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0.5, output: 0.5 },
+      { input: 1, output: 1 },
+    ],
+    "correct with comments and whitespace"
+  );
+  deepEqual(
+    parseTimingFunction("linear(0 10%, 0.5 20%, 1 90%)"),
+    [
+      { input: 0.1, output: 0 },
+      { input: 0.2, output: 0.5 },
+      { input: 0.9, output: 1 },
+    ],
+    "correct invocation with single stop"
+  );
+  deepEqual(
+    parseTimingFunction(
+      "linear(0, 0.1, 0.2, 0.3, 0.4, 0.5 50%, 0.6, 0.7, 0.8, 0.9 70%, 1)"
+    ),
+    [
+      { input: 0, output: 0 },
+      { input: 0.1, output: 0.1 },
+      { input: 0.2, output: 0.2 },
+      { input: 0.3, output: 0.3 },
+      { input: 0.4, output: 0.4 },
+      { input: 0.5, output: 0.5 },
+      { input: 0.55, output: 0.6 },
+      { input: 0.6, output: 0.7 },
+      {
+        // This should be 0.65, but JS doesn't play well with floating points, which makes
+        // the test fail. So re-do the computation here
+        input: 0.5 * 0.25 + 0.7 * 0.75,
+        output: 0.8,
+      },
+      { input: 0.7, output: 0.9 },
+      { input: 1, output: 1 },
+    ],
+    "correct invocation with single stop and run of non-stop values"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0, 0.5 80%, 0.75 40%, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0.8, output: 0.5 },
+      { input: 0.8, output: 0.75 },
+      { input: 1, output: 1 },
+    ],
+    "correct invocation with out of order single stop"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0.5 10% 40%, 0, 0.2 60% 70%, 0.75 80% 100%)"),
+    [
+      { input: 0.1, output: 0.5 },
+      { input: 0.4, output: 0.5 },
+      { input: 0.5, output: 0 },
+      { input: 0.6, output: 0.2 },
+      { input: 0.7, output: 0.2 },
+      { input: 0.8, output: 0.75 },
+      { input: 1, output: 0.75 },
+    ],
+    "correct invocation with multiple stops"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0, 0.2 60% 10%, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0.6, output: 0.2 },
+      { input: 0.6, output: 0.2 },
+      { input: 1, output: 1 },
+    ],
+    "correct invocation with multiple out of order stops"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0, 1.5, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0.5, output: 1.5 },
+      { input: 1, output: 1 },
+    ],
+    "linear function easing with output greater than 1"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(1, -0.5, 0)"),
+    [
+      { input: 0, output: 1 },
+      { input: 0.5, output: -0.5 },
+      { input: 1, output: 0 },
+    ],
+    "linear function easing with output less than 1"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0, 0.1 -10%, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 0, output: 0.1 },
+      { input: 1, output: 1 },
+    ],
+    "correct invocation, input value being unspecified in the first entry implies zero"
+  );
+
+  deepEqual(
+    parseTimingFunction("linear(0, 0.9 110%, 1)"),
+    [
+      { input: 0, output: 0 },
+      { input: 1.1, output: 0.9 },
+      { input: 1.1, output: 1 },
+    ],
+    "correct invocation, input value being unspecified in the last entry implies max input value"
+  );
+});
+
+add_task(function testGetSetCssLinearValue() {
+  const doc = Services.appShell.createWindowlessBrowser().document;
+  const widget = new LinearEasingFunctionWidget(doc.body);
+
+  widget.setCssLinearValue("linear(0)");
+  ok(!widget.getCssLinearValue(), "no value returned for invalid value");
+
+  widget.setCssLinearValue("linear(0, 0.5, 1)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0 0%, 0.5 50%, 1 100%)",
+    "no stops"
+  );
+
+  widget.setCssLinearValue("linear(0 10%, 0.5 20%, 1 90%)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0 10%, 0.5 20%, 1 90%)",
+    "with single stops"
+  );
+
+  widget.setCssLinearValue("linear(0, 0.5 80%, 0.75 40%, 1)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0 0%, 0.5 80%, 0.75 80%, 1 100%)",
+    "correcting out of order single stops"
+  );
+
+  widget.setCssLinearValue(
+    "linear(0.5 10% 40%, 0, 0.2 60% 70%, 0.75 80% 100%)"
+  );
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0.5 10%, 0.5 40%, 0 50%, 0.2 60%, 0.2 70%, 0.75 80%, 0.75 100%)",
+    "multiple stops"
+  );
+
+  widget.setCssLinearValue("linear(0, 0.2 60% 10%, 1)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0 0%, 0.2 60%, 0.2 60%, 1 100%)",
+    "correcting multiple out-of-order stops"
+  );
+
+  widget.setCssLinearValue("linear(1, -0.5, 1.5)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(1 0%, -0.5 50%, 1.5 100%)",
+    "output outside of [0,1] range"
+  );
+
+  widget.setCssLinearValue("linear(0 -10%, 0.5, 1 130%)");
+  deepEqual(
+    widget.getCssLinearValue(),
+    "linear(0 -10%, 0.5 60%, 1 130%)",
+    "input outside of [0%,100%] range"
+  );
+});