add tests for negative grep

Author: bahmutov

.github/workflows/ci.yml

@@ -73,6 +73,12 @@ jobs:
             --env grep=hello \
             --expect ./expects/hello.json
 
+      - name: Run tests without "hello" 🧪
+        run: |
+          npx cypress-expect run \
+            --env grep=-hello \
+            --expect-exactly ./expects/no-hello.json
+
       # check space character
       - name: Run tests with "works 2" 🧪
         run: |

expects/no-hello.json

@@ -0,0 +1,7 @@
+{
+  "hello world": "pending",
+  "works": "passed",
+  "works 2 @tag1": "passed",
+  "works 2 @tag1 @tag2": "passed",
+  "works @tag2": "passed"
+}