Grcov report - unit

1

//! Type for values in the [0.0, 1.0] range.

2

3

use cssparser::Parser;

4

5

use crate::error::*;

6

use crate::length::*;

7

use crate::parsers::Parse;

8

use crate::util;

9

10

29994125

#[derive(Debug, Default, Copy, Clone, PartialEq, PartialOrd)]

11

1016

pub struct UnitInterval(pub f64);

12

13

impl UnitInterval {

14

3926

    pub fn clamp(val: f64) -> UnitInterval {

15

3926

        UnitInterval(util::clamp(val, 0.0, 1.0))

16

3926

17

18

19

impl Parse for UnitInterval {

20

3772

    fn parse<'i>(parser: &mut Parser<'i, '_>) -> Result<UnitInterval, ParseError<'i>> {

21

3772

        let loc = parser.current_source_location();

22

3772

        let l: Length<Both> = Parse::parse(parser)?;

23

3767

        match l.unit {

24

3767

            LengthUnit::Px | LengthUnit::Percent => Ok(UnitInterval::clamp(l.length)),

25

            _ => Err(loc.new_custom_error(ValueErrorKind::value_error(

26

                "<unit-interval> must be in default or percent units",

27

            ))),

28

29

3772

30

31

32

impl From<UnitInterval> for u8 {

33

3

    fn from(val: UnitInterval) -> u8 {

34

3

        let UnitInterval(x) = val;

35

3

        (x * 255.0 + 0.5).floor() as u8

36

3

37

38

39

#[cfg(test)]

40

mod tests {

41

    use super::*;

42

43

    #[test]

44

2

    fn clamps() {

45

1

        assert_eq!(UnitInterval::clamp(-1.0), UnitInterval(0.0));

46

1

        assert_eq!(UnitInterval::clamp(0.0), UnitInterval(0.0));

47

1

        assert_eq!(UnitInterval::clamp(0.5), UnitInterval(0.5));

48

1

        assert_eq!(UnitInterval::clamp(1.0), UnitInterval(1.0));

49

1

        assert_eq!(UnitInterval::clamp(2.0), UnitInterval(1.0));

50

2

51

52

    #[test]

53

2

    fn parses_percentages() {

54

1

        assert_eq!(UnitInterval::parse_str("-100%").unwrap(), UnitInterval(0.0));

55

1

        assert_eq!(UnitInterval::parse_str("0%").unwrap(), UnitInterval(0.0));

56

1

        assert_eq!(UnitInterval::parse_str("50%").unwrap(), UnitInterval(0.5));

57

1

        assert_eq!(UnitInterval::parse_str("100%").unwrap(), UnitInterval(1.0));

58

1

        assert_eq!(

59

1

            UnitInterval::parse_str("100.1%").unwrap(),

60

            UnitInterval(1.0)

61

);

62

1

        assert_eq!(UnitInterval::parse_str("200%").unwrap(), UnitInterval(1.0));

63

2

64

65

    #[test]

66

2

    fn parses_number() {

67

1

        assert_eq!(UnitInterval::parse_str("0").unwrap(), UnitInterval(0.0));

68

1

        assert_eq!(UnitInterval::parse_str("1").unwrap(), UnitInterval(1.0));

69

1

        assert_eq!(UnitInterval::parse_str("0.5").unwrap(), UnitInterval(0.5));

70

2

71

72

    #[test]

73

2

    fn parses_out_of_range_number() {

74

1

        assert_eq!(UnitInterval::parse_str("-10").unwrap(), UnitInterval(0.0));

75

1

        assert_eq!(UnitInterval::parse_str("10").unwrap(), UnitInterval(1.0));

76

2

77

78

    #[test]

79

2

    fn errors_on_invalid_input() {

80

1

        assert!(UnitInterval::parse_str("").is_err());

81

1

        assert!(UnitInterval::parse_str("foo").is_err());

82

1

        assert!(UnitInterval::parse_str("-x").is_err());

83

1

        assert!(UnitInterval::parse_str("0.0foo").is_err());

84

1

        assert!(UnitInterval::parse_str("0.0%%").is_err());

85

1

        assert!(UnitInterval::parse_str("%").is_err());

86

2

87

88

    #[test]

89

2

    fn convert() {

90

1

        assert_eq!(u8::from(UnitInterval(0.0)), 0);

91

1

        assert_eq!(u8::from(UnitInterval(0.5)), 128);

92

1

        assert_eq!(u8::from(UnitInterval(1.0)), 255);

93

2

94