Add tests for double-star behavior

Author: ScottFreeCode

Diff for: test/integration/fixtures/glob/nested/glob.spec.js

@@ -0,0 +1,7 @@
+'use strict';
+
+describe('globbing test', function () {
+  it('should find this test', function () {
+    // see test/integration/glob.spec.js for details
+  });
+});

Diff for: test/integration/glob.spec.js

@@ -47,6 +47,27 @@ describe('globbing', function () {
         expect(results.stderr).to.contain('Could not find any test files matching pattern');
       }, done);
     });
+
+    describe('double-starred', function () {
+      it('should find the tests on multiple levels', function (done) {
+        testGlob.shouldSucceed('"./**/*.js"', function (results) {
+          expect(results.stdout).to.contain('["end",{"suites":2,"tests":2,"passes":2,"pending":0,"failures":0,');
+        }, done);
+      });
+
+      it('should not find a non-matching pattern', function (done) {
+        testGlob.shouldFail('"./**/*-none.js"', function (results) {
+          expect(results.stderr).to.contain('Could not find any test files matching pattern');
+        }, done);
+      });
+
+      it('should handle both matching and non-matching patterns in the same command', function (done) {
+        testGlob.shouldSucceed('"./**/*.js" "./**/*-none.js"', function (results) {
+          expect(results.stdout).to.contain('["end",{"suites":2,"tests":2,"passes":2,"pending":0,"failures":0,');
+          expect(results.stderr).to.contain('Could not find any test files matching pattern');
+        }, done);
+      });
+    });
   });
 });