Add support for specifying which version of pester to install

Author: ChrisLGardner

Extension/src/pester.ts

@@ -19,6 +19,15 @@ export async function run() {
         let CodeCoverageOutputFile = tl.getInput("CodeCoverageOutputFile");
         let CodeCoverageFolder = tl.getInput("CodeCoverageFolder");
         let ScriptBlock = tl.getInput("ScriptBlock");
+        let PesterVersion = tl.getInput("PesterVersion");
+
+        let TargetPesterVersion = "0.0.0";
+        if (PesterVersion === "OtherVersion") {
+            TargetPesterVersion = tl.getInput("TargetPesterVersion");
+            if (!TargetPesterVersion.match(/\d+\.\d+\.\d+/g)) {
+                logError(`Invalid version number provided for Pester. Please ensure it is in the format x.y.z`);
+            }
+        }
 
         // we need to get the verbose flag passed in as script flag
         var verbose = (tl.getVariable("System.Debug") === "true");
@@ -75,6 +84,11 @@ export async function run() {
             args.push("-Verbose");
         }
 
+        if (TargetPesterVersion !== "0.0.0") {
+            args.push("-PesterVersion");
+            args.push(TargetPesterVersion);
+        }
+
         logInfo(`${executable} ${args.join(" ")}`);
 
         var spawn = require("child_process").spawn, child;
@@ -94,4 +108,4 @@ export async function run() {
     }
 }
 
-run();
+run();

Extension/task/task.json

@@ -109,6 +109,32 @@
       "groupName": "advanced",
       "visibleRule": "usePSCore = False"
     },
+    {
+      "name": "PesterVersion",
+      "type": "radio",
+      "label": "Pester Version",
+      "defaultValue": "LatestVersion",
+      "required": false,
+      "options": {
+          "LatestVersion": "Latest Available version",
+          "OtherVersion": "Specify other version"
+      },
+      "groupName": "advanced",
+      "helpMarkDown": "Choose which version of Pester to use for your tests, the version specified will be downloaded from an available PS Gallery. If no gallery is available then it will fall back to the version shipped with the task, currently 4.10.1"
+    },
+    {
+        "name": "TargetPesterVersion",
+        "aliases": [
+            "preferredPesterVersion"
+        ],
+        "type": "string",
+        "label": "Preferred Pester PowerShell Version",
+        "defaultValue": "",
+        "required": true,
+        "visibleRule": "PesterVersion = OtherVersion",
+        "groupName": "advanced",
+        "helpMarkDown": "Speicify version of Pester to install if not latest. This will download it from whichever PS Gallery has it available. If it's not available then the task will fail."
+    },
     {
       "name": "ScriptBlock",
       "type": "string",