Special case just markdown messages WRT the issue/checks hybrid

Author: orta

source/dsl/DangerResults.ts

@@ -211,6 +211,9 @@ export const emptyResults = (): DangerResults => ({ fails: [], markdowns: [], wa
 export const isEmptyResults = (results: DangerResults): boolean =>
   [...results.fails, ...results.warnings, ...results.messages, ...results.markdowns].length === 0
 
+export const isMarkdownOnlyResults = (results: DangerResults): boolean =>
+  results.markdowns.length > 0 && [...results.fails, ...results.warnings, ...results.messages].length === 0
+
 export function resultsIntoInlineResults(results: DangerResults): DangerInlineResults[] {
   // Here we iterate through all keys ("fails", "warnings", "messages", "markdowns") and for each violation
   // in given kind we produce new DangerInlineResult or append a violation to existing result. This is all

source/platforms/github/comms/_tests/_checksCommenter.test.ts

@@ -29,11 +29,9 @@ it("deals with warnings", () => {
   )
 })
 
-it("deals with markdowns", () => {
+it("deals with *just* markdowns by returning the markdowns", () => {
   const newResults = tweetSizedResultsFromResults(markdownResults, checksResults)
-  expect(newResults.markdowns[0].message).toMatchInlineSnapshot(
-    `"Danger run resulted in 2 markdowns; to find out more, see the [checks page](https://gh.com/a)."`
-  )
+  expect(newResults.markdowns[0].message).toMatchInlineSnapshot(`"### Short Markdown Message1"`)
 })
 
 it("handles singular results", () => {

source/platforms/github/comms/checksCommenter.ts

@@ -1,5 +1,5 @@
 import { GitHubAPI } from "../GitHubAPI"
-import { DangerResults, isEmptyResults, emptyResults } from "../../../dsl/DangerResults"
+import { DangerResults, isEmptyResults, isMarkdownOnlyResults } from "../../../dsl/DangerResults"
 import { ExecutorOptions } from "../../../runner/Executor"
 import { resultsToCheck } from "./checks/resultsToCheck"
 import { getAccessTokenForInstallation } from "./checks/githubAppSupport"
@@ -92,22 +92,28 @@ export const GitHubChecksCommenter = (api: GitHubAPI) => {
   }
 }
 
-export const tweetSizedResultsFromResults = (results: DangerResults, checksResponse: any): DangerResults =>
-  isEmptyResults(results)
-    ? emptyResults()
-    : {
-        warnings: [],
-        messages: [],
-        fails: [],
-        markdowns: [
-          {
-            message:
-              "Danger run resulted in " +
-              messageFromResults(results) +
-              `; to find out more, see the [checks page](${checksResponse.html_url}).`,
-          },
-        ],
-      }
+export const tweetSizedResultsFromResults = (results: DangerResults, checksResponse: any): DangerResults => {
+  const allowMarkdowns = isMarkdownOnlyResults(results)
+  const isEmpty = isEmptyResults(results)
+
+  if (allowMarkdowns || isEmpty) {
+    return results
+  }
+
+  return {
+    warnings: [],
+    messages: [],
+    fails: [],
+    markdowns: [
+      {
+        message:
+          "Danger run resulted in " +
+          messageFromResults(results) +
+          `; to find out more, see the [checks page](${checksResponse.html_url}).`,
+      },
+    ],
+  }
+}
 
 const messageFromResults = (results: DangerResults): string => {
   const appendS = (arr: any[]) => (arr.length === 1 ? "" : "s")