1 files changed, 129 insertions, 0 deletions
diff --git a/devtools/client/inspector/grids/test/xpcshell/test_compare_fragments_geometry.js b/devtools/client/inspector/grids/test/xpcshell/test_compare_fragments_geometry.js
new file mode 100644
index 0000000000..57f617a3ec
--- /dev/null
+++ b/devtools/client/inspector/grids/test/xpcshell/test_compare_fragments_geometry.js
@@ -0,0 +1,129 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const {
+  compareFragmentsGeometry,
+} = require("resource://devtools/client/inspector/grids/utils/utils.js");
+
+const TESTS = [
+  {
+    desc: "No fragments",
+    grids: [[], []],
+    expected: true,
+  },
+  {
+    desc: "Different number of fragments",
+    grids: [
+      [{}, {}, {}],
+      [{}, {}],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different number of columns",
+    grids: [
+      [{ cols: { lines: [{}, {}] }, rows: { lines: [] } }],
+      [{ cols: { lines: [{}] }, rows: { lines: [] } }],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different number of rows",
+    grids: [
+      [{ cols: { lines: [{}, {}] }, rows: { lines: [{}] } }],
+      [{ cols: { lines: [{}, {}] }, rows: { lines: [{}, {}] } }],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different number of rows and columns",
+    grids: [
+      [{ cols: { lines: [{}] }, rows: { lines: [{}] } }],
+      [{ cols: { lines: [{}, {}] }, rows: { lines: [{}, {}] } }],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different column sizes",
+    grids: [
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 500 }] },
+          rows: { lines: [] },
+        },
+      ],
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 1000 }] },
+          rows: { lines: [] },
+        },
+      ],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different row sizes",
+    grids: [
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 500 }] },
+          rows: { lines: [{ start: -100 }] },
+        },
+      ],
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 500 }] },
+          rows: { lines: [{ start: 0 }] },
+        },
+      ],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Different row and column sizes",
+    grids: [
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 500 }] },
+          rows: { lines: [{ start: -100 }] },
+        },
+      ],
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 505 }] },
+          rows: { lines: [{ start: 0 }] },
+        },
+      ],
+    ],
+    expected: false,
+  },
+  {
+    desc: "Complete structure, same fragments",
+    grids: [
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 100.3 }, { start: 200.6 }] },
+          rows: { lines: [{ start: 0 }, { start: 1000 }, { start: 2000 }] },
+        },
+      ],
+      [
+        {
+          cols: { lines: [{ start: 0 }, { start: 100.3 }, { start: 200.6 }] },
+          rows: { lines: [{ start: 0 }, { start: 1000 }, { start: 2000 }] },
+        },
+      ],
+    ],
+    expected: true,
+  },
+];
+
+function run_test() {
+  for (const { desc, grids, expected } of TESTS) {
+    if (desc) {
+      info(desc);
+    }
+    equal(compareFragmentsGeometry(grids[0], grids[1]), expected);
+  }
+}