52 lines
956 B
Go
52 lines
956 B
Go
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package packer
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import (
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"io/ioutil"
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"os"
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"testing"
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)
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func TestFileCache_Implements(t *testing.T) {
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var raw interface{}
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raw = &FileCache{}
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if _, ok := raw.(Cache); !ok {
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t.Fatal("FileCache must be a Cache")
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}
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}
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func TestFileCache(t *testing.T) {
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cacheDir, err := ioutil.TempDir("", "packer")
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if err != nil {
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t.Fatalf("error creating temporary dir: %s", err)
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}
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defer os.RemoveAll(cacheDir)
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cache := &FileCache{CacheDir: cacheDir}
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path, err := cache.Lock("foo")
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if err != nil {
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t.Fatalf("error locking: %s", err)
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}
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err = ioutil.WriteFile(path, []byte("data"), 0666)
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if err != nil {
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t.Fatalf("error writing: %s", err)
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}
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cache.Unlock("foo")
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path, ok := cache.RLock("foo")
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if !ok {
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t.Fatal("cache says key doesn't exist")
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}
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defer cache.RUnlock("foo")
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data, err := ioutil.ReadFile(path)
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if err != nil {
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t.Fatalf("error reading file: %s", err)
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}
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if string(data) != "data" {
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t.Fatalf("unknown data: %s", data)
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}
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}
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