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index.test.ts
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509 lines (487 loc) · 29.7 KB
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import { describe, expect, it } from 'vitest'
import { calculateChildPosition, type Dimension, type Offset } from './index.ts'
const viewportRect: Dimension = { width: 80, height: 20 }
const buttonRect: Offset & Dimension = {
top: 10,
left: 38,
width: 4,
height: 2,
}
const moveTo = (left: number, top: number) => (rect) => ({ ...rect, top, left })
const moveBy = (dx: number, dy: number) => (rect) => ({
...rect,
top: rect.top + dy,
left: rect.left + dx,
})
describe('strategies', () => {
const testStrategy = (strategyName, expectedResult) => {
const menuRect = { width: 12, height: 6 }
it(`${strategyName}`, () => {
const args: Parameters<typeof calculateChildPosition> = [
strategyName,
buttonRect,
menuRect,
viewportRect,
{ gap: 1 },
]
assertVisual(args, expectedResult)
})
}
testStrategy(
'bottom left',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------------------------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------------------------------------------------
`
)
testStrategy(
'bottom center',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------------------------------------------------
----------------------------------############----------------------------------
----------------------------------############----------------------------------
----------------------------------############----------------------------------
----------------------------------############----------------------------------
----------------------------------############----------------------------------
----------------------------------############----------------------------------
--------------------------------------------------------------------------------
`
)
testStrategy(
'bottom right',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------------------------------------------------
------------------------------############--------------------------------------
------------------------------############--------------------------------------
------------------------------############--------------------------------------
------------------------------############--------------------------------------
------------------------------############--------------------------------------
------------------------------############--------------------------------------
--------------------------------------------------------------------------------
`
)
testStrategy(
'left top',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-------------------------############-@@@@--------------------------------------
-------------------------############-@@@@--------------------------------------
-------------------------############-------------------------------------------
-------------------------############-------------------------------------------
-------------------------############-------------------------------------------
-------------------------############-------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
testStrategy(
'right bottom',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
--------------------------------------@@@@-############-------------------------
--------------------------------------@@@@-############-------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
testStrategy(
'right center',
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
--------------------------------------@@@@-############-------------------------
--------------------------------------@@@@-############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
describe('primary axis', () => {
const menuRect = { width: 12, height: 10 }
it('bounces to the other direction on overflow', () => {
assertVisual(
['bottom left', moveBy(0, 5)(buttonRect), menuRect, viewportRect, { gap: 1 }],
// Despite the "bottom left" strategy,
// there is not enough space at the bottom.
// Therefore, the menu gets bounced to the top.
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------------------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('tries to keep menu fully on-screen', () => {
assertVisual(
['bottom left', buttonRect, menuRect, viewportRect, { gap: 1 }],
// Even though gap 1 is requested, but it would push the menu above the viewport.
`
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------############------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('tries switching axis to minimize overlapping', () => {
const largerMenuRect = { width: 12, height: 12 }
assertVisual(
['bottom left', buttonRect, largerMenuRect, viewportRect, { gap: 1 }],
// Even though gap 1 is requested, but it would push the menu above the viewport.
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
--------------------------------------@@@@-############-------------------------
--------------------------------------@@@@-############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
-------------------------------------------############-------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
})
describe('secondary axis', () => {
const menuRect = { width: 40, height: 5 }
it('works normally when there’s no overflowing', () => {
assertVisual(
['bottom', buttonRect, menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------------------------@@@@--------------------------------------
--------------------########################################--------------------
--------------------########################################--------------------
--------------------########################################--------------------
--------------------########################################--------------------
--------------------########################################--------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('aligns the right edge, when there is not enough space to the right', () => {
assertVisual(
['bottom', moveBy(30, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------@@@@--------
--------------------------------------------------------------------@@@@--------
--------------------------------########################################--------
--------------------------------########################################--------
--------------------------------########################################--------
--------------------------------########################################--------
--------------------------------########################################--------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('aligns the left edge, when there is not enough space to the left', () => {
assertVisual(
['bottom', moveBy(-30, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------@@@@--------------------------------------------------------------------
--------@@@@--------------------------------------------------------------------
--------########################################--------------------------------
--------########################################--------------------------------
--------########################################--------------------------------
--------########################################--------------------------------
--------########################################--------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('center-aligns if there is not enough space when right-aligned', () => {
assertVisual(
['bottom right', moveBy(-16, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
----------------------@@@@------------------------------------------------------
----------------------@@@@------------------------------------------------------
----########################################------------------------------------
----########################################------------------------------------
----########################################------------------------------------
----########################################------------------------------------
----########################################------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('center-aligns if there is not enough space when left-aligned', () => {
assertVisual(
['bottom left', moveBy(16, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
------------------------------------------------------@@@@----------------------
------------------------------------------------------@@@@----------------------
------------------------------------########################################----
------------------------------------########################################----
------------------------------------########################################----
------------------------------------########################################----
------------------------------------########################################----
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('left-aligns if there is not enough space when right-aligned and center-aligning would still cause an overflow', () => {
assertVisual(
['bottom right', moveBy(-24, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------@@@@--------------------------------------------------------------
--------------@@@@--------------------------------------------------------------
--------------########################################--------------------------
--------------########################################--------------------------
--------------########################################--------------------------
--------------########################################--------------------------
--------------########################################--------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
it('right-aligns if there is not enough space when left-aligned and center-aligning would still cause an overflow', () => {
assertVisual(
['bottom left', moveBy(24, 0)(buttonRect), menuRect, viewportRect],
`
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------@@@@--------------
--------------------------------------------------------------@@@@--------------
--------------------------########################################--------------
--------------------------########################################--------------
--------------------------########################################--------------
--------------------------########################################--------------
--------------------------########################################--------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
--------------------------------------------------------------------------------
`
)
})
})
function assertVisual(
args: Parameters<typeof calculateChildPosition>,
expectedResult: string
): void {
const [, parentRect, childDimension, viewportDimension, ,] = args
const childPosition = calculateChildPosition(...args)
let output = '\n'
for (let i = 0; i < viewportDimension.height; i++) {
for (let j = 0; j < viewportDimension.width; j++) {
const inParent =
parentRect.top <= i &&
i < parentRect.top + parentRect.height &&
parentRect.left <= j &&
j < parentRect.left + parentRect.width
const inChild =
childPosition.top <= i &&
i < childPosition.top + childDimension.height &&
childPosition.left <= j &&
j < childPosition.left + childDimension.width
output += inParent ? '@' : inChild ? '#' : '-'
}
output += '\n'
}
expect(output).toBe(expectedResult)
}