feat: add typescript support (#95)

⚠️ does not filter specs if they have `interface` or `type` keyword, so those tests will be skipped

* adding TypeScript and a TS spec

* feat: add typescript spec file support

* try to confirm filtering ts specs

Author: bahmutov

.github/workflows/ci.yml

@@ -372,6 +372,13 @@ jobs:
             --env grepUntagged=true \
             --expect-exactly expects/describe-tags-spec-untagged.json
 
+      - name: filter TypeScript spec 🧪
+        run: |
+          npx cypress-expect \
+            --config testFiles="**/ts-spec.ts" \
+            --env grep=loads,grepOmitFiltered=true,grepFilterSpecs=true \
+            --expect-exactly expects/ts-spec.json
+
   release:
     needs: [tests1, tests2, tests3]
     runs-on: ubuntu-20.04

cypress/integration/ts-spec.ts

@@ -0,0 +1,18 @@
+describe('TypeScript spec', () => {
+  it('works', () => {
+    type Person = {
+      name: string
+    }
+
+    const person: Person = {
+      name: 'Joe',
+    }
+
+    cy.wrap(person).should('have.property', 'name', 'Joe')
+  })
+
+  it('loads', () => {
+    const n: number = 1
+    cy.wrap(n).should('eq', 1)
+  })
+})

cypress/tsconfig.json

@@ -0,0 +1,8 @@
+{
+  "compilerOptions": {
+    "types": ["cypress"]
+  },
+  "files": [
+    "./integration/**/*.ts"
+  ],
+}

expects/ts-spec.json

@@ -0,0 +1,5 @@
+{
+  "TypeScript spec": {
+    "loads": "passing"
+  }
+}

package-lock.json

@@ -20,15 +20,16 @@
     "cypress-each": "^1.5.0",
     "cypress-expect": "2.5.0",
     "prettier": "2.3.1",
-    "semantic-release": "17.4.3"
+    "semantic-release": "17.4.3",
+    "typescript": "^4.5.4"
   },
   "repository": {
     "type": "git",
     "url": "https://github.com/bahmutov/cypress-grep.git"
   },
   "dependencies": {
     "debug": "4.3.1",
-    "find-test-names": "^1.2.1",
+    "find-test-names": "^1.3.0",
     "globby": "^11.0.4"
   }
 }

package.json

@@ -82,6 +82,8 @@ function cypressGrepPlugin(config) {
             return shouldRun
           })
         } catch (err) {
+          debug(err.message)
+          debug(err.stack)
           console.error('Could not determine test names in file: %s', specFile)
           console.error('Will run it to let the grep filter the tests')
           return true