Tweak terminal test

The first pass seems to always fail because no input actually makes it
to the the terminal; perhaps this will alleviate that.  Also add a
timeout so we can retry more quickly.

Author: code-asher

test/e2e/models/CodeServer.ts

@@ -310,8 +310,8 @@ export class CodeServerPage {
   /**
    * Wait for a tab to open for the specified file.
    */
-  async waitForTab(file: string): Promise<void> {
-    await this.page.waitForSelector(`.tab :text("${path.basename(file)}")`)
+  async waitForTab(file: string, timeout?: number): Promise<void> {
+    await this.page.waitForSelector(`.tab :text("${path.basename(file)}")`, { timeout })
   }
 
   /**

test/e2e/terminal.test.ts

@@ -41,6 +41,15 @@ describe("Integrated Terminal", true, [], {}, () => {
     await codeServerPage.page.keyboard.type(`code-server ${tmpFile}`)
     await codeServerPage.page.keyboard.press("Enter")
 
-    await codeServerPage.waitForTab(path.basename(tmpFile))
+    // If it is not showing yet try again; sometimes the terminal does not seem
+    // to accept input right away.
+    if (!(await codeServerPage.tabIsVisible(path.basename(tmpFile)))) {
+      await codeServerPage.page.keyboard.type(`code-server ${tmpFile}`)
+      await codeServerPage.page.keyboard.press("Enter")
+
+      // The tab should eventually show up so wait for it.  It should not take
+      // long so we want to fail somewhat fast.
+      await codeServerPage.waitForTab(path.basename(tmpFile), 1000)
+    }
   })
 })