Merge branch 'grid-interactions' into livekit-experiment

test/video-grid/model-test.ts

@@ -21,7 +21,9 @@ import {
   fillGaps,
   forEachCellInArea,
   Grid,
+  resize,
   row,
+  tryMoveTile,
 } from "../../src/video-grid/model";
 import { TileDescriptor } from "../../src/video-grid/VideoGrid";
 
@@ -169,6 +171,50 @@ dddd
 iegh`
 );
 
+testFillGaps(
+  "keeps a large tile from hanging off the bottom",
+  `
+abcd
+efgh
+    
+ii  
+ii`,
+  `
+abcd
+iigh
+iief`
+);
+
+testFillGaps(
+  "pushes a chain of large tiles upwards",
+  `
+abcd
+e fg
+hh  
+hh  
+ ii 
+ ii`,
+  `
+hhcd
+hhfg
+aiib
+eii`
+);
+
+testFillGaps(
+  "gives up on pushing large tiles upwards when not possible",
+  `
+aabb
+aabb
+cc  
+cc`,
+  `
+aabb
+aabb
+cc  
+cc`
+);
+
 function testCycleTileSize(
   title: string,
   tileId: string,
@@ -281,3 +327,112 @@ def`;
   );
   expect(showGrid(appendItems(newItems, mkGrid(grid1)))).toBe(grid2);
 });
+
+function testTryMoveTile(
+  title: string,
+  from: number,
+  to: number,
+  input: string,
+  output: string
+): void {
+  test(`tryMoveTile ${title}`, () => {
+    expect(showGrid(tryMoveTile(mkGrid(input), from, to))).toBe(output);
+  });
+}
+
+testTryMoveTile(
+  "refuses to move a tile too far to the left",
+  1,
+  -1,
+  `
+abc`,
+  `
+abc`
+);
+
+testTryMoveTile(
+  "refuses to move a tile too far to the right",
+  1,
+  3,
+  `
+abc`,
+  `
+abc`
+);
+
+testTryMoveTile(
+  "moves a large tile to an unoccupied space",
+  3,
+  1,
+  `
+a b
+ccd
+cce`,
+  `
+acc
+bcc
+d e`
+);
+
+testTryMoveTile(
+  "refuses to move a large tile to an occupied space",
+  3,
+  1,
+  `
+abb
+ccd
+cce`,
+  `
+abb
+ccd
+cce`
+);
+
+function testResize(
+  title: string,
+  columns: number,
+  input: string,
+  output: string
+): void {
+  test(`resize ${title}`, () => {
+    expect(showGrid(resize(mkGrid(input), columns))).toBe(output);
+  });
+}
+
+testResize(
+  "contracts the grid",
+  2,
+  `
+abbb
+cbbb
+ddde
+dddf
+gh`,
+  `
+af
+bb
+bb
+ch
+dd
+dd
+eg`
+);
+
+testResize(
+  "expands the grid",
+  4,
+  `
+af
+bb
+bb
+ch
+dd
+dd
+eg`,
+  `
+bbbc
+bbbf
+addd
+hddd
+ge`
+);