test(nested): Add failing false positive.

package.json

@@ -65,7 +65,7 @@
     "test": "yarn run lint && yarn run test:build && yarn run test:mocha && yarn run test:tslint-v5 && yarn run test:tslint-v6 && yarn run test:tslint-v6-compat",
     "test:build": "yarn run test:clean && tsc -p tsconfig.json",
     "test:clean": "rimraf build",
-    "test:debug": "tslint --test ./test/v6/fixtures/no-ignored-subscription/**/tslint.json",
+    "test:debug": "tslint --test ./test/v6/fixtures/no-nested-subscribe/prototype/tslint.json",
     "test:issues": "yarn run test:clean && tsc -p tsconfig.json && tslint --test ./test/v6/fixtures/issues/**/tslint.json",
     "test:mocha": "mocha build/**/*-spec.js",
     "test:tslint-v5": "yarn --cwd ./test/v5 install && yarn --cwd ./test/v5 upgrade && tslint --test ./test/v5/fixtures/**/tslint.json",

test/v6/fixtures/no-nested-subscribe/prototype/fixture.ts.lint

@@ -0,0 +1,6 @@
+import { Observable } from "rxjs";
+
+const observableSubscribe = Observable.prototype.subscribe;
+expect(Observable.prototype.subscribe).to.equal(observableSubscribe);
+
+[no-nested-subscribe]: Nested subscribe calls are forbidden

test/v6/fixtures/no-nested-subscribe/prototype/tsconfig.json

@@ -0,0 +1,13 @@
+{
+  "compilerOptions": {
+    "baseUrl": ".",
+    "lib": ["es2015"],
+    "noEmit": true,
+    "paths": {
+      "rxjs": ["../../node_modules/rxjs"]
+    },
+    "skipLibCheck": true,
+    "target": "es5"
+  },
+  "include": ["fixture.ts"]
+}

test/v6/fixtures/no-nested-subscribe/prototype/tslint.json

@@ -0,0 +1,8 @@
+{
+  "defaultSeverity": "error",
+  "jsRules": {},
+  "rules": {
+    "rxjs-no-nested-subscribe": { "severity": "error" }
+  },
+  "rulesDirectory": "../../../../../build/rules"
+}