fs: fix parsing of times and durations of the form "YYYY-MM-DD HH:MM:SS"

Before this fix, the parsing code gave an error like this

    parsing "2022-08-02 07:00:00" as fs.Time failed: expected newline

This was due to the Scan call failing to read all the data.

This patch fixes that, and redoes the tests

fs/parseduration.go

@@ -126,7 +126,7 @@ func parseDurationFromNow(age string, getNow func() time.Time) (d time.Duration,
 
 // ParseDuration parses a duration string. Accept ms|s|m|h|d|w|M|y suffixes. Defaults to second if not provided
 func ParseDuration(age string) (time.Duration, error) {
-	return parseDurationFromNow(age, time.Now)
+	return parseDurationFromNow(age, timeNowFunc)
 }
 
 // ReadableString parses d into a human-readable duration.
@@ -216,7 +216,7 @@ func (d *Duration) UnmarshalJSON(in []byte) error {
 
 // Scan implements the fmt.Scanner interface
 func (d *Duration) Scan(s fmt.ScanState, ch rune) error {
-	token, err := s.Token(true, nil)
+	token, err := s.Token(true, func(rune) bool { return true })
 	if err != nil {
 		return err
 	}

fs/parseduration_test.go

@@ -145,11 +145,28 @@ func TestDurationReadableString(t *testing.T) {
 }
 
 func TestDurationScan(t *testing.T) {
-	var v Duration
-	n, err := fmt.Sscan(" 17m ", &v)
+	now := time.Date(2020, 9, 5, 8, 15, 5, 250, time.UTC)
+	oldTimeNowFunc := timeNowFunc
+	timeNowFunc = func() time.Time { return now }
+	defer func() { timeNowFunc = oldTimeNowFunc }()
+
+	for _, test := range []struct {
+		in   string
+		want Duration
+	}{
+		{"17m", Duration(17 * time.Minute)},
+		{"-12h", Duration(-12 * time.Hour)},
+		{"0", Duration(0)},
+		{"off", DurationOff},
+		{"2022-03-26T17:48:19Z", Duration(now.Sub(time.Date(2022, 03, 26, 17, 48, 19, 0, time.UTC)))},
+		{"2022-03-26 17:48:19", Duration(now.Sub(time.Date(2022, 03, 26, 17, 48, 19, 0, time.Local)))},
+	} {
+		var got Duration
+		n, err := fmt.Sscan(test.in, &got)
 		require.NoError(t, err)
 		assert.Equal(t, 1, n)
-	assert.Equal(t, Duration(17*60*time.Second), v)
+		assert.Equal(t, test.want, got)
+	}
 }
 
 func TestParseUnmarshalJSON(t *testing.T) {

fs/parsetime.go

@@ -83,7 +83,7 @@ func (t *Time) UnmarshalJSON(in []byte) error {
 
 // Scan implements the fmt.Scanner interface
 func (t *Time) Scan(s fmt.ScanState, ch rune) error {
-	token, err := s.Token(true, nil)
+	token, err := s.Token(true, func(rune) bool { return true })
 	if err != nil {
 		return err
 	}

fs/parsetime_test.go

@@ -93,15 +93,23 @@ func TestTimeScan(t *testing.T) {
 	timeNowFunc = func() time.Time { return now }
 	defer func() { timeNowFunc = oldTimeNowFunc }()
 
-	var v1, v2, v3, v4, v5 Time
-	n, err := fmt.Sscan(" 17m -12h 0 off 2022-03-26T17:48:19Z ", &v1, &v2, &v3, &v4, &v5)
+	for _, test := range []struct {
+		in   string
+		want Time
+	}{
+		{"17m", Time(now.Add(-17 * time.Minute))},
+		{"-12h", Time(now.Add(12 * time.Hour))},
+		{"0", Time(now)},
+		{"off", Time(time.Time{})},
+		{"2022-03-26T17:48:19Z", Time(time.Date(2022, 03, 26, 17, 48, 19, 0, time.UTC))},
+		{"2022-03-26 17:48:19", Time(time.Date(2022, 03, 26, 17, 48, 19, 0, time.Local))},
+	} {
+		var got Time
+		n, err := fmt.Sscan(test.in, &got)
 		require.NoError(t, err)
-	assert.Equal(t, 5, n)
-	assert.Equal(t, Time(now.Add(-17*time.Minute)), v1)
-	assert.Equal(t, Time(now.Add(12*time.Hour)), v2)
-	assert.Equal(t, Time(now), v3)
-	assert.Equal(t, Time(time.Time{}), v4)
-	assert.Equal(t, Time(time.Date(2022, 03, 26, 17, 48, 19, 0, time.UTC)), v5)
+		assert.Equal(t, 1, n)
+		assert.Equal(t, test.want, got)
+	}
 }
 
 func TestParseTimeUnmarshalJSON(t *testing.T) {