[Tests] no-cycle: add passing test cases

tests/files/cycles/ignore/.eslintrc

@@ -0,0 +1,5 @@
+{
+  "rules": {
+    "import/no-cycle": 0
+  }
+}

tests/files/cycles/ignore/index.js

@@ -0,0 +1,2 @@
+import { foo } from "../depth-zero";
+export { foo };

tests/files/cycles/intermediate-ignore.js

@@ -0,0 +1,2 @@
+import foo from "./ignore";
+export { foo };

tests/src/rules/no-cycle.js

@@ -267,5 +267,23 @@ ruleTester.run('no-cycle', rule, {
       parser: parsers.BABEL_OLD,
       errors: [error(`Dependency cycle via ./flow-types-depth-two:4=>./es6/depth-one:1`)],
     }),
+    test({
+      code: 'import { foo } from "./intermediate-ignore"',
+      errors: [
+        {
+          message: 'Dependency cycle via ./ignore:1',
+          line: 1,
+        },
+      ],
+    }),
+    test({
+      code: 'import { foo } from "./ignore"',
+      errors: [
+        {
+          message: 'Dependency cycle detected.',
+          line: 1,
+        },
+      ],
+    }),
   ),
 });