fix: use default context for both tags if not specified

Author: bahmutov

README.md

@@ -150,7 +150,7 @@ By default this plugin tests static site _after build_. But maybe you want to ru
     wait-on-timeout = '30' # seconds
 ```
 
-Parameters you can place into `preBuild` inputs: `start`, `wait-on`, `wait-on-timeout`, `spec`, `record`, `group`, and `tag`.
+Parameters you can place into `preBuild` inputs: `start`, `wait-on`, `wait-on-timeout`, `spec`, `record`, `group`, and `tag`. If there is `preBuild` and `postBuild` testing with different tags, the first one wins :)
 
 ## Debugging
 

src/index.js

@@ -177,6 +177,7 @@ module.exports = function cypressPlugin (pluginConfig) {
       let tag
       if (record) {
         group = preBuildInputs.group || 'preBuild'
+
         if (preBuildInputs.tag) {
           tag = preBuildInputs.tag
         } else {
@@ -213,8 +214,11 @@ module.exports = function cypressPlugin (pluginConfig) {
       let tag
       if (record) {
         group = pluginConfig.group || 'postBuild'
+
         if (pluginConfig.tag) {
           tag = pluginConfig.tag
+        } else {
+          tag = process.env.CONTEXT
         }
       }