Use MockBufferService in tests

src/SelectionManager.test.ts

@@ -9,7 +9,7 @@ import { SelectionModel } from './SelectionModel';
 import { BufferSet } from './BufferSet';
 import { ITerminal, IBuffer } from './Types';
 import { IBufferLine } from 'common/Types';
-import { MockTerminal, MockCharSizeService, MockOptionsService } from './TestUtils.test';
+import { MockTerminal, MockCharSizeService, MockOptionsService, MockBufferService } from './TestUtils.test';
 import { BufferLine, CellData } from 'common/buffer/BufferLine';
 
 class TestMockTerminal extends MockTerminal {
@@ -44,9 +44,10 @@ describe('SelectionManager', () => {
 
   beforeEach(() => {
     terminal = new TestMockTerminal();
-    (terminal as any).cols = 80;
-    (terminal as any).rows = 2;
-    terminal.buffers = new BufferSet(terminal, new MockOptionsService({ scrollback: 100 }));
+    terminal.buffers = new BufferSet(
+      new MockOptionsService({ scrollback: 100 }),
+      new MockBufferService(80, 2)
+    );
     terminal.buffer = terminal.buffers.active;
     buffer = terminal.buffer;
     selectionManager = new TestSelectionManager(terminal);