Fix NewForHLC for unpadded strings

Author: josephschorr

internal/datastore/revisions/hlcrevision.go

@@ -50,13 +50,14 @@ func parseHLCRevisionString(revisionStr string) (datastore.Revision, error) {
 		return datastore.NoRevision, fmt.Errorf("invalid revision string: %q", revisionStr)
 	}
 
-	logicalclock, err := strconv.ParseInt(pieces[1], 10, 32)
-	if err != nil {
-		return datastore.NoRevision, fmt.Errorf("invalid revision string: %q", revisionStr)
+	if len(pieces[1]) > logicalClockLength {
+		return datastore.NoRevision, spiceerrors.MustBugf("invalid revision string due to unexpected logical clock size (%d): %q", len(pieces[1]), revisionStr)
 	}
 
-	if len(pieces[1]) != logicalClockLength {
-		return datastore.NoRevision, spiceerrors.MustBugf("invalid revision string due to unexpected logical clock size (%d): %q", len(pieces[1]), revisionStr)
+	paddedLogicalClockStr := pieces[1] + strings.Repeat("0", logicalClockLength-len(pieces[1]))
+	logicalclock, err := strconv.ParseInt(paddedLogicalClockStr, 10, 32)
+	if err != nil {
+		return datastore.NoRevision, fmt.Errorf("invalid revision string: %q", revisionStr)
 	}
 
 	return HLCRevision{timestamp, uint32(logicalclock) + logicalClockOffset}, nil

internal/datastore/revisions/hlcrevision_test.go

@@ -17,6 +17,8 @@ func TestNewForHLC(t *testing.T) {
 		"-1",
 		"1.0000000023",
 		"1703283409994227985.0000000004",
+		"1703283409994227985.0000000040",
+		"1703283409994227985.0010000000",
 	}
 
 	for _, tc := range tcs {
@@ -41,6 +43,7 @@ func TestTimestampNanoSec(t *testing.T) {
 		"1.0000000023":                   1,
 		"9223372036854775807.0000000002": 9223372036854775807,
 		"1703283409994227985.0000000004": 1703283409994227985,
+		"1703283409994227985.0000000040": 1703283409994227985,
 	}
 
 	for tc, nano := range tcs {
@@ -63,6 +66,11 @@ func TestInexactFloat64(t *testing.T) {
 		"1.0000000023":                   1.0000000023,
 		"9223372036854775807.0000000002": 9223372036854775807.0000000002,
 		"1703283409994227985.0000000004": 1703283409994227985.0000000004,
+		"1703283409994227985.0000000040": 1703283409994227985.000000004,
+		"1703283409994227985.000000004":  1703283409994227985.000000004,
+		"1703283409994227985.0010":       1703283409994227985.001,
+		"1703283409994227985.0010000000": 1703283409994227985.001,
+		"1703283409994227985.001":        1703283409994227985.001,
 	}
 
 	for tc, floatValue := range tcs {
@@ -117,6 +125,15 @@ func TestHLCKeyEquals(t *testing.T) {
 		{
 			"1703283409994227985.0000000005", "1703283409994227985.0000000005", true,
 		},
+		{
+			"1703283409994227985.0000000050", "1703283409994227985.0000000050", true,
+		},
+		{
+			"1703283409994227985.0000000050", "1703283409994227985.0000000005", false,
+		},
+		{
+			"1703283409994227985.000000005", "1703283409994227985.0000000050", true,
+		},
 	}
 
 	for _, tc := range tcs {