// Test creation and conversion functions.
// Ref: false

---
// Compare both ways.
#test(rgb(0%, 30%, 70%), rgb("004db3"))

// Alpha channel.
#test(rgb(255, 0, 0, 50%), rgb("ff000080"))

// Test color modification methods.
#test(rgb(25, 35, 45).lighten(10%), rgb(48, 57, 66))
#test(rgb(40, 30, 20).darken(10%), rgb(36, 27, 18))
#test(rgb("#133337").negate(), rgb(236, 204, 200))
#test(white.lighten(100%), white)

---
// Test gray color conversion.
// Ref: true
#stack(dir: ltr, rect(fill: luma(0)), rect(fill: luma(80%)))

---
// Error for values that are out of range.
// Error: 11-14 must be between 0 and 255
#test(rgb(-30, 15, 50))

---
// Error: 6-11 string contains non-hexadecimal letters
#rgb("lol")

---
// Error: 5-7 missing argument: red component
#rgb()

---
// Error: 5-11 missing argument: blue component
#rgb(0, 1)

---
// Error: 21-26 expected integer or ratio, found boolean
#rgb(10%, 20%, 30%, false)

---
// Ref: true
#let envelope = symbol(
  "🖂",
  ("stamped", "🖃"),
  ("stamped.pen", "🖆"),
  ("lightning", "🖄"),
  ("fly", "🖅"),
)

#envelope
#envelope.stamped
#envelope.pen
#envelope.stamped.pen
#envelope.lightning
#envelope.fly

---
// Test conversion to string.
#test(str(123), "123")
#test(str(50.14), "50.14")
#test(str(10 / 3).len() > 10, true)

---
// Error: 6-8 expected integer, float, label, or string, found content
#str([])

---
#assert(range(2, 5) == (2, 3, 4))