Add first API test

src/Terminal.integration.ts

@@ -13,6 +13,7 @@ import * as path from 'path';
 import * as pty from 'node-pty';
 import { assert } from 'chai';
 import { Terminal } from './Terminal';
+import { Terminal as PublicTerminal } from './public/Terminal';
 import { WHITESPACE_CELL_CHAR } from './Buffer';
 import { IViewport } from './Types';
 import { CellData } from './BufferLine';
@@ -78,6 +79,35 @@ function terminalToString(term: Terminal): string {
   return result;
 }
 
+describe('API tests', () => {
+  let api: PublicTerminal;
+  let core: TestTerminal;
+
+  // expect files need terminal at 80x25!
+  const INIT_COLS = 80;
+  const INIT_ROWS = 25;
+
+  beforeEach(() => {
+    api = new PublicTerminal({ cols: INIT_COLS, rows: INIT_ROWS });
+    core = (api as any)._core;
+    core.innerWrite = () => (core as any)._innerWrite();
+    core.refresh = () => {};
+    core.viewport = <IViewport>{
+      syncScrollArea: () => {}
+    };
+  });
+
+  describe('buffer', () => {
+    it('IBufferLine.getLine', () => {
+      core.writeBuffer.push('abc\n\rdef');
+      core.innerWrite();
+      assert.equal(api.buffer.length, INIT_ROWS);
+      assert.equal(api.buffer.getLine(0).translateToString(true), 'abc');
+      assert.equal(api.buffer.getLine(1).translateToString(true), 'def');
+    });
+  });
+});
+
 // Skip tests on Windows since pty.open isn't supported
 if (os.platform() !== 'win32') {
   const consoleLog = console.log;

src/public/Terminal.ts

@@ -176,7 +176,7 @@ class BufferLineApiView implements IBufferLineApi {
 
   public get isWrapped(): boolean { return this._line.isWrapped; }
   public getCell(x: number): IBufferCellApi { return new BufferCellApiView(this._line, x); }
-  public translateToString(trimRight: boolean, startColumn: number, endColumn: number): string {
+  public translateToString(trimRight?: boolean, startColumn?: number, endColumn?: number): string {
     return this._line.translateToString(trimRight, startColumn, endColumn);
   }
 }

typings/xterm.d.ts

@@ -834,7 +834,7 @@ declare module 'xterm' {
     /**
      * Gets the line
      */
-    translateToString(trimRight: boolean, startColumn: number, endColumn: number): string;
+    translateToString(trimRight?: boolean, startColumn?: number, endColumn?: number): string;
   }
 
   interface IBufferCell {