clean up ensureLoggedIn (just have user pass URL), update readme

README.md

@@ -27,7 +27,7 @@ npx k6-script-from-har createTimeEntryWorkflow.har tests/createTimeEntryWorkflow
 
 run the test
 ``` sh
-npx k6 run tests/createTimeEntryWorkflow.js
+k6 run tests/createTimeEntryWorkflow.js
 ```
 
 # Har file creation
@@ -43,5 +43,15 @@ Playwright
 
 
 # Advanced usage
-`testTemplate.js` and `testCommon.js` are used by the script.   
-These files can be modified for your specific purposes e.g. hardcoded auth information, etc.
+`testCommon.js` will fetch an Authorization Bearer token, and attach the header automatically on all `httpRequest` if the environment variable `AT_AUTH_URL`  is set.  
+note: to set an environment variable in a command prompt wrap the command with double quotes if the value includes & characters.  
+e.g. `set "AT_AUTH_URL=https://your.auth.url/oauth2/v2.0/token?username=myUserName&password=myPassword&etc_etc_etc"`
+
+the following variables are also available
+* `AT_VU_COUNT` - defaults to 15
+* `AT_ITERATIONS` - defaults to AT_VU_COUNT * 3
+*  k6 reference details [here](https://grafana.com/docs/k6/latest/using-k6/k6-options/how-to/#where-to-set-options)
+by default the testTemplate defines options to run a constant number of VUs a given number of iterations. More executor details (here)[https://grafana.com/docs/k6/latest/using-k6/scenarios/executors/]
+
+`testTemplate.js` and `testCommon.js` are used by the script.  
+These files can be modified for your specific purposes e.g. hardcoded auth information, set the default iterations, etc.

src/testCommon.js

@@ -21,10 +21,10 @@ export function httpRequest(method, url, body, params = {}) {
     check(res, checks);
 }
 
-export function _ensureLoggedIn(username, password, url) {
+export function _ensureLoggedIn(url) {
     if (state.access_token) return;
 
-    const res = http.post(url.replace('${username}', username).replace('${password}', password));
+    const res = http.post(url);
     if (!(res.status >= 200 && res.status < 400)){
         console.error(res.status_text);
         throw 'could not log in';
@@ -35,9 +35,6 @@ export function _ensureLoggedIn(username, password, url) {
 }
 
 export function commonSetup() {
-    if (!__ENV.AT_USERNAME) console.warn('environment variable `AT_USERNAME` not specified');
-	if (!__ENV.AT_PASSWORD) console.warn('environment variable `AT_PASSWORD` not specified');
-	if (!__ENV.AT_AUTH_URL) console.warn('environment variable `AT_AUTH_URL` not specified');
-    if (!__ENV.AT_USERNAME || !__ENV.AT_PASSWORD || !__ENV.AT_AUTH_URL) return;
-	_ensureLoggedIn(__ENV.AT_USERNAME, __ENV.AT_PASSWORD, __ENV.AT_AUTH_URL);
+	if (!__ENV.AT_AUTH_URL) { console.warn('environment variable `AT_AUTH_URL` not specified'); return; }
+	_ensureLoggedIn(__ENV.AT_AUTH_URL);
 }