runner test for --only

test/fixtures/only.js

@@ -0,0 +1,25 @@
+var test = require('../..').test
+
+test('root test without {only: true}', function (t) {
+  t.pass('test will not run without --only')
+  t.end()
+})
+
+test('root test with {only: true}', {only: true}, function (t) {
+  t.pass('test will log an error when run without --only')
+  t.end()
+})
+
+test('group', function (group) {
+  group.test('subtest without {only: true}', function (t) {
+    t.pass('subtest will not run without --only')
+    t.end()
+  })
+
+  group.test('subtest with {only: true}', {only: true}, function (t) {
+    t.pass('test will log an error when run without --only')
+    t.end()
+  })
+
+  group.end()
+})

test/runner-only.js

@@ -0,0 +1,43 @@
+var t = require('../')
+var execFile = require('child_process').execFile
+var node = process.execPath
+var run = require.resolve('../bin/run.js')
+
+t.test('--only flag', function (t) {
+  var file = require.resolve('./fixtures/only.js')
+  var args = [
+    run,
+    '--only',
+    file
+  ]
+
+  execFile(node, args, function (err, stdout, stderr) {
+    if (err) {
+      throw err
+    }
+
+    t.equal(stderr, '')
+
+    t.match(stdout, /^ok 1 - .*[\\\/]only.js/m)
+    t.end()
+  })
+})
+
+t.test('{only: true} without --only flag', function (t) {
+  var file = require.resolve('./fixtures/only.js')
+  var args = [
+    run,
+    file
+  ]
+
+  execFile(node, args, function (err, stdout, stderr) {
+    if (err) {
+      throw err
+    }
+
+    t.equal(stderr.trim(), '# Warning: "only" has {only: true} set but all tests are run')
+
+    t.match(stdout, /^ok 1 - .*[\\\/]only.js/m)
+    t.end()
+  })
+})