Folder rename datatable -> data-table

Summary: just a rename, as we will have `data-inspector` folder as well in next diffs.

Reviewed By: passy

Differential Revision: D27591891

fbshipit-source-id: b1fe92cbf4be1633e623e59b694efc3f687c3413

desktop/flipper-plugin/src/ui/data-table/__tests__/DataTableManager.node.tsx

@@ -0,0 +1,119 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @format
+ */
+
+import {
+  computeAddRangeToSelection,
+  computeSetSelection,
+} from '../DataTableManager';
+
+test('computeSetSelection', () => {
+  const emptyBase = {
+    current: -1,
+    items: new Set<number>(),
+  };
+
+  const partialBase = {
+    current: 7,
+    items: new Set([2, 3, 8, 9]),
+  };
+
+  // set selection
+  expect(computeSetSelection(emptyBase, 2)).toEqual({
+    current: 2,
+    items: new Set([2]),
+  });
+
+  // move selection 2 down
+  expect(computeSetSelection(partialBase, (x) => x + 2)).toEqual({
+    current: 9,
+    items: new Set([9]),
+  });
+
+  // expand selection
+  expect(computeSetSelection(partialBase, (x) => x + 5, true)).toEqual({
+    current: 12,
+    items: new Set([2, 3, 7, 8, 9, 10, 11, 12]),
+  });
+
+  // expand selection backward
+  expect(computeSetSelection(partialBase, 5, true)).toEqual({
+    current: 5,
+    items: new Set([2, 3, 8, 9, 5, 6, 7]), // n.b. order is irrelevant
+  });
+
+  // single item existing selection
+  expect(
+    computeSetSelection(
+      {
+        current: 4,
+        items: new Set([4]),
+      },
+      5,
+    ),
+  ).toEqual({
+    current: 5,
+    items: new Set([5]),
+  });
+
+  // single item existing selection, toggle item off
+  expect(
+    computeSetSelection(
+      {
+        current: 4,
+        items: new Set([4]),
+      },
+      4,
+    ),
+  ).toEqual({
+    current: -1,
+    items: new Set(),
+  });
+});
+
+test('computeAddRangeToSelection', () => {
+  const emptyBase = {
+    current: -1,
+    items: new Set<number>(),
+  };
+
+  const partialBase = {
+    current: 7,
+    items: new Set([2, 3, 8, 9]),
+  };
+
+  // add range selection
+  expect(computeAddRangeToSelection(emptyBase, 23, 25)).toEqual({
+    current: 25,
+    items: new Set([23, 24, 25]),
+  });
+
+  // add range selection
+  expect(computeAddRangeToSelection(partialBase, 23, 25)).toEqual({
+    current: 25,
+    items: new Set([2, 3, 8, 9, 23, 24, 25]),
+  });
+
+  // add range backward
+  expect(computeAddRangeToSelection(partialBase, 25, 23)).toEqual({
+    current: 23,
+    items: new Set([2, 3, 8, 9, 23, 24, 25]),
+  });
+
+  // invest selection - toggle off
+  expect(computeAddRangeToSelection(partialBase, 8, 8, true)).toEqual({
+    current: 9, // select the next thing
+    items: new Set([2, 3, 9]),
+  });
+
+  // invest selection - toggle on
+  expect(computeAddRangeToSelection(partialBase, 5, 5, true)).toEqual({
+    current: 5,
+    items: new Set([2, 3, 5, 8, 9]),
+  });
+});