Fix problem with fingerprint test

observIQ · May 21, 2021 · e85de66 · e85de66
1 parent e68195e
commit e85de66
Showing 1 changed file with 9 additions and 2 deletions.
diff --git a/operator/builtin/input/file/fingerprint_test.go b/operator/builtin/input/file/fingerprint_test.go
@@ -254,16 +254,23 @@ func TestFingerprintStartsWith_FromFile(t *testing.T) {
 	partialFile, err := ioutil.TempFile(tempDir, "")
 	require.NoError(t, err)
 
+	// Write the first byte before comparing, since empty files will never match
+	_, err = partialFile.Write(content[:1])
+	require.NoError(t, err)
+	content = content[1:]
+
 	// Write one byte at a time and validate that updated
 	// full fingerprint still starts with partial
 	for i := range content {
 		_, err = partialFile.Write(content[i:i])
 		require.NoError(t, err)
 
-		pff, err := operator.NewFingerprint(fullFile)
+		pff, err := operator.NewFingerprint(partialFile)
 		require.NoError(t, err)
 
-		require.True(t, fff.StartsWith(pff))
+		match := fff.StartsWith(pff)
+
+		require.True(t, match)
 	}
 }