test: add R setup to CI and stub session package prompt

Author: randy3k

.github/workflows/main.yml

@@ -13,6 +13,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
+      - uses: r-lib/actions/setup-r@v2
+        with:
+          use-public-rspm: true
       - uses: actions/setup-node@v4
         with:
           node-version: 20

src/test/suite/terminal.test.ts

@@ -42,7 +42,8 @@ suite('R Terminal', () => {
             }
         };
         sandbox.stub(util, 'config').returns(configStub as unknown as vscode.WorkspaceConfiguration);
-        sandbox.stub(util, 'getRterm').resolves('/usr/local/bin/R');
+        sandbox.stub(util, 'getRterm').resolves('R');
+        sandbox.stub(util, 'promptToInstallSessPackage').resolves();
 
         const options = await rTerminal.makeTerminalOptions();
 
@@ -66,7 +67,8 @@ suite('R Terminal', () => {
             }
         };
         sandbox.stub(util, 'config').returns(configStub as unknown as vscode.WorkspaceConfiguration);
-        sandbox.stub(util, 'getRterm').resolves('/usr/local/bin/R');
+        sandbox.stub(util, 'getRterm').resolves('R');
+        sandbox.stub(util, 'promptToInstallSessPackage').resolves();
 
         const options = await rTerminal.makeTerminalOptions();
 
@@ -83,7 +85,8 @@ suite('R Terminal', () => {
             }
         };
         sandbox.stub(util, 'config').returns(configStub as unknown as vscode.WorkspaceConfiguration);
-        sandbox.stub(util, 'getRterm').resolves('/usr/local/bin/R');
+        sandbox.stub(util, 'getRterm').resolves('R');
+        sandbox.stub(util, 'promptToInstallSessPackage').resolves();
 
         // Spy on startSessionWatcher
         const startSessionWatcherSpy = sandbox.spy(session, 'startSessionWatcher');
@@ -123,7 +126,8 @@ suite('R Terminal', () => {
             }
         };
         sandbox.stub(util, 'config').returns(configStub as unknown as vscode.WorkspaceConfiguration);
-        sandbox.stub(util, 'getRterm').resolves('/usr/local/bin/R');
+        sandbox.stub(util, 'getRterm').resolves('R');
+        sandbox.stub(util, 'promptToInstallSessPackage').resolves();
 
         // We need to mock the terminal and its processId
         const fakeTerminal = {