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Diffstat (limited to 'common/para/para_test.go')
-rw-r--r-- | common/para/para_test.go | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/common/para/para_test.go b/common/para/para_test.go new file mode 100644 index 000000000..9b268b0c0 --- /dev/null +++ b/common/para/para_test.go @@ -0,0 +1,90 @@ +// Copyright 2019 The Hugo Authors. All rights reserved. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package para + +import ( + "context" + "runtime" + + "sort" + "sync" + "sync/atomic" + "testing" + "time" + + qt "github.com/frankban/quicktest" +) + +func TestPara(t *testing.T) { + if runtime.NumCPU() < 4 { + t.Skipf("skip para test, CPU count is %d", runtime.NumCPU()) + } + + c := qt.New(t) + + c.Run("Order", func(c *qt.C) { + n := 500 + ints := make([]int, n) + for i := 0; i < n; i++ { + ints[i] = i + } + + p := New(4) + r, _ := p.Start(context.Background()) + + var result []int + var mu sync.Mutex + for i := 0; i < n; i++ { + i := i + r.Run(func() error { + mu.Lock() + defer mu.Unlock() + result = append(result, i) + return nil + }) + } + + c.Assert(r.Wait(), qt.IsNil) + c.Assert(result, qt.HasLen, len(ints)) + c.Assert(sort.IntsAreSorted(result), qt.Equals, false, qt.Commentf("Para does not seem to be parallel")) + sort.Ints(result) + c.Assert(result, qt.DeepEquals, ints) + + }) + + c.Run("Time", func(c *qt.C) { + const n = 100 + + p := New(5) + r, _ := p.Start(context.Background()) + + start := time.Now() + + var counter int64 + + for i := 0; i < n; i++ { + r.Run(func() error { + atomic.AddInt64(&counter, 1) + time.Sleep(1 * time.Millisecond) + return nil + }) + } + + c.Assert(r.Wait(), qt.IsNil) + c.Assert(counter, qt.Equals, int64(n)) + c.Assert(time.Since(start) < n/2*time.Millisecond, qt.Equals, true) + + }) + +} |