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Reset hash state between runs.

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This commit is contained in:
Tim Hockin 2015-03-23 21:25:51 -07:00
parent c35593a717
commit 9ed6c95e8e
2 changed files with 7 additions and 0 deletions
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1
pkg/util/hash.go
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@ -26,6 +26,7 @@ import (
// which follows pointers and prints actual values of the nested objects
// ensuring the hash does not change when a pointer changes.
func DeepHashObject(hasher hash.Hash, objectToWrite interface{}) {
hasher.Reset()
printer := spew.ConfigState{Indent: " ", SortKeys: true}
printer.Fprintf(hasher, "%#v", objectToWrite)
}

6
pkg/util/hash_test.go
View File

@ -49,12 +49,18 @@ func TestDeepObjectPointer(t *testing.T) {
// Act
DeepHashObject(hasher1, myUni1)
hash1 := hasher1.Sum32()
DeepHashObject(hasher1, myUni1)
hash1a := hasher1.Sum32()
DeepHashObject(hasher2, myUni2)
hash2 := hasher2.Sum32()
DeepHashObject(hasher3, myUni3)
hash3 := hasher3.Sum32()
// Assert
if hash1 != hash1a {
t.Errorf("repeated hash of the same object produced different results: %d vs %d", hash1, hash1a)
}
if hash1 == hash2 {
t.Errorf("hash1 (%d) and hash2(%d) must be different because they have different values for wheel size", hash1, hash2)
}