Add lint rules to ensure every key under prs is stage and each key tha

t is there is a valid URL for a PR on emberjs/rfcs

Author: kategengler

lib/frontmatter-linter.js

@@ -45,20 +45,50 @@ module.exports = class FrontmatterLinter {
       prs: {
         type: 'object',
         required: true,
+        conform(value) {
+          let keys = Object.keys(value);
+          return keys.every((key) => stages.includes(key));
+        },
+        messages: {
+          conform: `must only include keys for RFC Stages: ${stages.join(', ')}`,
+        },
         properties: {
           accepted: {
             required: true,
             allowEmpty: false,
-            conform(url) {
-              let regex = /https:\/\/github.com\/emberjs\/rfcs\/pull\/\d+(\/|$)$/;
-              let cli = /https:\/\/github.com\/ember-cli\/rfcs\/pull\/\d+(\/|$)$/;
-              return regex.test(url) || cli.test(url);
-            },
+            conform: rfcUrlConform,
             messages: {
               conform:
                 'must be the URL for the original pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
             },
           },
+          'ready-for-release': {
+            required: false,
+            allowEmpty: true,
+            conform: rfcUrlConform,
+            messages: {
+              conform:
+                'must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+            },
+          },
+          released: {
+            required: false,
+            allowEmpty: true,
+            conform: rfcUrlConform,
+            messages: {
+              conform:
+                'must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+            },
+          },
+          recommended: {
+            required: false,
+            allowEmpty: true,
+            conform: rfcUrlConform,
+            messages: {
+              conform:
+                'must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+            },
+          },
         },
       },
       'release-date': {
@@ -132,3 +162,9 @@ function formatErrors(errors) {
     return `${e.property} ${e.message}`;
   });
 }
+
+function rfcUrlConform(url) {
+  let regex = /https:\/\/github.com\/emberjs\/rfcs\/pull\/\d+(\/|$)$/;
+  let cli = /https:\/\/github.com\/ember-cli\/rfcs\/pull\/\d+(\/|$)$/;
+  return regex.test(url) || cli.test(url);
+}

test/frontmatter-linter-test.js

@@ -68,6 +68,36 @@ prs:
   accepted: https://github.com/emberjs/rfcs/pull/123/files
 ---`;
 
+const multiplePrsKeysMetadata = `---
+stage: recommended
+start-date: 2020-01-01 
+release-date: 2020-04-02 
+release-versions:
+  ember-source: v1.1.1
+  ember-data: v0.0.3
+teams: 
+  - framework
+prs: 
+  accepted: https://github.com/emberjs/rfcs/pull/123/
+  ready-for-release: https://example.com/emberjs/rfcs/pull/456/
+  released: https://github.com/emberjs/ember.js/pull/789/
+  recommended: https://raw.github.com/emberjs/rfcs/987
+---`;
+
+const extraPrsKeysMetadata = `---
+stage: recommended
+start-date: 2020-01-01 
+release-date: 2020-04-02 
+release-versions:
+  ember-source: v1.1.1
+  ember-data: v0.0.3
+teams: 
+  - framework
+prs: 
+  accepted: https://github.com/emberjs/rfcs/pull/123/
+  edition: https://github.com/emberjs/rfcs/pull/456/ 
+---`;
+
 const cliUrlForRFCMetadataMarkdown = `---
 stage: recommended
 start-date: 2020-01-01 
@@ -153,6 +183,24 @@ describe('FrontmatterLinter', function () {
     ]);
   });
 
+  it('reports errors for each incorrect key under prs', function () {
+    let results = linter.lint(multiplePrsKeysMetadata);
+
+    expect(results.messages).to.deep.eql([
+      'prs.ready-for-release must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+      'prs.released must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+      'prs.recommended must be the URL for the advancement pull request on emberjs/rfcs, for example: https://github.com/emberjs/rfcs/pull/123',
+    ]);
+  });
+
+  it('reports errors for extraneous keys under prs', function () {
+    let results = linter.lint(extraPrsKeysMetadata);
+
+    expect(results.messages).to.deep.eql([
+      'prs must only include keys for RFC Stages: proposed, exploring, accepted, ready-for-release, released, recommended',
+    ]);
+  });
+
   it('reports NO errors for completed metadata', function () {
     let results = linter.lint(completedMetadataMarkdown);
     expect(results.messages).to.be.empty;