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module demo.ShapesTest

# Run with `golo --test demos/shapes` — every *_test.golo in the directory —
# or pick this one file. The assertions come from the embedded testing module.
import gololang.Testing

struct Point = { x, y }

augment Point {
  function describe = |this| -> "(" + this: x() + ", " + this: y() + ")"
}

function main = |args| {
  let p = Point(1, 2)
  assertEqual(p: describe(), "(1, 2)", "a point describes itself")
  assertEqual(p: x() + p: y(), 3, "fields add up")
  assertTrue(p: x() < p: y(), "x comes before y")
}