github.com/askholme/packer@v0.7.2-0.20140924152349-70d9566a6852/packer/cache_test.go (about)

     1  package packer
     2  
     3  import (
     4  	"io/ioutil"
     5  	"os"
     6  	"strings"
     7  	"testing"
     8  )
     9  
    10  type TestCache struct{}
    11  
    12  func (TestCache) Lock(string) string {
    13  	return ""
    14  }
    15  
    16  func (TestCache) Unlock(string) {}
    17  
    18  func (TestCache) RLock(string) (string, bool) {
    19  	return "", false
    20  }
    21  
    22  func (TestCache) RUnlock(string) {}
    23  
    24  func TestFileCache_Implements(t *testing.T) {
    25  	var raw interface{}
    26  	raw = &FileCache{}
    27  	if _, ok := raw.(Cache); !ok {
    28  		t.Fatal("FileCache must be a Cache")
    29  	}
    30  }
    31  
    32  func TestFileCache(t *testing.T) {
    33  	cacheDir, err := ioutil.TempDir("", "packer")
    34  	if err != nil {
    35  		t.Fatalf("error creating temporary dir: %s", err)
    36  	}
    37  	defer os.RemoveAll(cacheDir)
    38  
    39  	cache := &FileCache{CacheDir: cacheDir}
    40  
    41  	// Test path with no extension (GH-716)
    42  	path := cache.Lock("/foo.bar/baz")
    43  	defer cache.Unlock("/foo.bar/baz")
    44  	if strings.Contains(path, ".bar") {
    45  		t.Fatalf("bad: %s", path)
    46  	}
    47  
    48  	// Test paths with a ?
    49  	path = cache.Lock("foo.ext?foo=bar.foo")
    50  	defer cache.Unlock("foo.ext?foo=bar.foo")
    51  	if !strings.HasSuffix(path, ".ext") {
    52  		t.Fatalf("bad extension with question mark: %s", path)
    53  	}
    54  
    55  	// Test normal paths
    56  	path = cache.Lock("foo.iso")
    57  	if !strings.HasSuffix(path, ".iso") {
    58  		t.Fatalf("path doesn't end with suffix '%s': '%s'", ".iso", path)
    59  	}
    60  
    61  	err = ioutil.WriteFile(path, []byte("data"), 0666)
    62  	if err != nil {
    63  		t.Fatalf("error writing: %s", err)
    64  	}
    65  
    66  	cache.Unlock("foo.iso")
    67  
    68  	path, ok := cache.RLock("foo.iso")
    69  	if !ok {
    70  		t.Fatal("cache says key doesn't exist")
    71  	}
    72  	defer cache.RUnlock("foo.iso")
    73  
    74  	data, err := ioutil.ReadFile(path)
    75  	if err != nil {
    76  		t.Fatalf("error reading file: %s", err)
    77  	}
    78  
    79  	if string(data) != "data" {
    80  		t.Fatalf("unknown data: %s", data)
    81  	}
    82  }