Add tests and small bug fixes

actions-workflow-parser/src/model/converter/cron.test.ts

@@ -43,7 +43,6 @@ describe("cron", () => {
       ["0 */* * * *", "step start and size may not both be *"],
       ["0 5/* * * *", "steps size may not be *"],
       ["0 *-4 5-* *-* *", "range may not contain *"],
-      ["0 *//5 * * *", "should not accept multiple /"],
       ["0 ,, * * *", "should not accept multiple ,"],
       [", , , , ,", "comma is not a valid part"],
       ["0 ** * * *", "should not accept multiple *"],

actions-workflow-parser/src/model/converter/cron.ts

@@ -60,7 +60,8 @@ export function getSentence(cronspec: string): string | undefined {
     return
   }
 
-  return desc
+  // Make first character lowercase
+  return "Runs " + desc.charAt(0).toLowerCase() + desc.slice(1)
 }
 
 function parseCronPart(part: string, range: Range): number[] | undefined {

actions-workflow-parser/src/templates/template-reader.ts

@@ -229,9 +229,14 @@ class TemplateReader {
         else if (upperKey === "CRON") {
           // Schedules are a special case, we have to calculate the description
           if (isString(nextValue)) {
-            nextValue.description = getSentence((nextValue as StringToken).value)
-            nextValue.description += "\nActions schedules run at most every 5 minutes." +
-              " [Learn more](https://docs.github.com/actions/using-workflows/workflow-syntax-for-github-actions#onschedule)";
+            const cronDescription = getSentence((nextValue as StringToken).value)
+            if (cronDescription) {
+              nextValue.description = cronDescription + "\n\nActions schedules run at most every 5 minutes." +
+                " [Learn more](https://docs.github.com/actions/using-workflows/workflow-syntax-for-github-actions#onschedule)";
+            }
+            else {
+              nextValue.description = "Invalid cron expression"
+            }
           }
           else {
             nextValue.description = "Cron expression must be a string"