Update the readme, add a test (#46)

* Add a test to days = -1
* Update the readme on how to build it

.github/workflows/test.yml

@@ -0,0 +1,26 @@
+name: "Build"
+on: # rebuild any PRs and main branch changes
+  pull_request:
+  push:
+    branches:
+      - master
+      - 'releases/*'
+
+jobs:
+  build: # make sure build/ci work properly
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: |
+        npm install
+        npm run all
+  test: # make sure the action works on a clean machine without building
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: ./
+      with:
+        repo-token: ${{ secrets.GITHUB_TOKEN }}
+        stale-issue-message: 'This issue is stale'
+        stale-pr-message: 'This PR is stale'
+        debug-only: true

README.md

@@ -2,6 +2,23 @@
 
 Warns and then closes issues and PRs that have had no activity for a specified amount of time.
 
+### Building and testing
+
+Install the dependencies  
+```bash
+$ npm install
+```
+
+Build the typescript and package it for distribution
+```bash
+$ npm run build && npm run pack
+```
+
+Run the tests :heavy_check_mark:  
+```bash
+$ npm test
+```
+
 ### Usage
 
 See [action.yml](./action.yml) For comprehensive list of options.

__tests__/main.test.ts

@@ -178,3 +178,25 @@ test('exempt pr labels will not be marked stale', async () => {
 
   expect(processor.staleIssues.length).toEqual(2); // PR should get processed even though it has an exempt **issue** label
 });
+
+test('stale issues should not be closed if days is set to -1', async () => {
+  const TestIssueList: Issue[] = [
+    generateIssue(1, 'My first issue', '2020-01-01T17:00:00Z', false, [
+      'Stale'
+    ]),
+    generateIssue(2, 'My first PR', '2020-01-01T17:00:00Z', true, ['Stale']),
+    generateIssue(3, 'Another issue', '2020-01-01T17:00:00Z', false, ['Stale'])
+  ];
+
+  let opts = DefaultProcessorOptions;
+  opts.daysBeforeClose = -1;
+
+  const processor = new IssueProcessor(DefaultProcessorOptions, async p =>
+    p == 1 ? TestIssueList : []
+  );
+
+  // process our fake issue list
+  await processor.processIssues(1);
+
+  expect(processor.closedIssues.length).toEqual(0);
+});

action.yml

@@ -25,7 +25,7 @@ inputs:
     description: 'The label to apply when a pull request is stale.'
     default: 'Stale'
   exempt-pr-labels:
-    description: 'The labels to apply when a pull request is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")''
+    description: 'The labels to apply when a pull request is exempt from being marked stale. Separate multiple labels with commas (eg. "label1,label2")'
     default: ''
   only-labels:
     description: 'Only issues or pull requests with all of these labels are checked if stale. Defaults to `[]` (disabled) and can be a comma-separated list of labels.'