github.com/richardbowden/terraform@v0.6.12-0.20160901200758-30ea22c25211/helper/mutexkv/mutexkv_test.go (about)

     1  package mutexkv
     2  
     3  import (
     4  	"testing"
     5  	"time"
     6  )
     7  
     8  func TestMutexKVLock(t *testing.T) {
     9  	mkv := NewMutexKV()
    10  
    11  	mkv.Lock("foo")
    12  
    13  	doneCh := make(chan struct{})
    14  
    15  	go func() {
    16  		mkv.Lock("foo")
    17  		close(doneCh)
    18  	}()
    19  
    20  	select {
    21  	case <-doneCh:
    22  		t.Fatal("Second lock was able to be taken. This shouldn't happen.")
    23  	case <-time.After(50 * time.Millisecond):
    24  		// pass
    25  	}
    26  }
    27  
    28  func TestMutexKVUnlock(t *testing.T) {
    29  	mkv := NewMutexKV()
    30  
    31  	mkv.Lock("foo")
    32  	mkv.Unlock("foo")
    33  
    34  	doneCh := make(chan struct{})
    35  
    36  	go func() {
    37  		mkv.Lock("foo")
    38  		close(doneCh)
    39  	}()
    40  
    41  	select {
    42  	case <-doneCh:
    43  		// pass
    44  	case <-time.After(50 * time.Millisecond):
    45  		t.Fatal("Second lock blocked after unlock. This shouldn't happen.")
    46  	}
    47  }
    48  
    49  func TestMutexKVDifferentKeys(t *testing.T) {
    50  	mkv := NewMutexKV()
    51  
    52  	mkv.Lock("foo")
    53  
    54  	doneCh := make(chan struct{})
    55  
    56  	go func() {
    57  		mkv.Lock("bar")
    58  		close(doneCh)
    59  	}()
    60  
    61  	select {
    62  	case <-doneCh:
    63  		// pass
    64  	case <-time.After(50 * time.Millisecond):
    65  		t.Fatal("Second lock on a different key blocked. This shouldn't happen.")
    66  	}
    67  }