86d6a63d0f
- Reject corrupt compressed Kiwi chunks instead of accepting raw garbage\n- Tolerate legacy source metadata without editedFields in renderer fallbacks\n- Align font, derived glyph, shared style, renderer mock, and ownership tests with current contracts\n- Restore clean quick and heavy unit quality gates
106 lines
3.2 KiB
TypeScript
106 lines
3.2 KiB
TypeScript
import { describe, expect, test } from 'bun:test'
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import { clipBoundsToPolygon, clipPolygon, type Vector } from '@open-pencil/scene-graph'
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describe('clipPolygon', () => {
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test('returns the subject unchanged when the clip has fewer than 3 corners', () => {
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const subject: Vector[] = [
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{ x: 0, y: 0 },
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{ x: 10, y: 0 },
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{ x: 10, y: 10 },
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{ x: 0, y: 10 }
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]
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expect(clipPolygon(subject, [])).toBe(subject)
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expect(
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clipPolygon(subject, [
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{ x: 0, y: 0 },
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{ x: 1, y: 1 }
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])
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).toBe(subject)
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})
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test('returns null when the subject is fully outside the clip', () => {
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const subject: Vector[] = [
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{ x: 100, y: 100 },
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{ x: 110, y: 100 },
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{ x: 110, y: 110 },
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{ x: 100, y: 110 }
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]
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const clip: Vector[] = [
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{ x: 0, y: 0 },
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{ x: 10, y: 0 },
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{ x: 10, y: 10 },
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{ x: 0, y: 10 }
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]
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expect(clipPolygon(subject, clip)).toBeNull()
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})
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test('preserves the clipped polygon across a chain so a later clip excludes corners the inner clip removed', () => {
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// Subject: the full [0,100]² square.
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const subject: Vector[] = [
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{ x: 0, y: 0 },
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{ x: 100, y: 0 },
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{ x: 100, y: 100 },
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{ x: 0, y: 100 }
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]
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// Inner clip D1: the diamond inscribed in the square (corners at the edge
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// midpoints). It removes the four square corners, including (0,0).
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const d1: Vector[] = [
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{ x: 50, y: 0 },
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{ x: 100, y: 50 },
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{ x: 50, y: 100 },
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{ x: 0, y: 50 }
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]
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// Outer clip D2: a small square [0,30]² covering the (0,0) corner that D1
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// already removed. If the chain collapsed D1's result to its AABB ([0,100]²,
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// which re-adds the corner) before applying D2, the corner would survive.
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// Preserving the polygon keeps it excluded: the only surviving region is the
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// triangle where the diamond's x+y=50 edge meets [0,30]², i.e. AABB
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// [20,30]×[20,30].
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const d2: Vector[] = [
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{ x: 0, y: 0 },
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{ x: 30, y: 0 },
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{ x: 30, y: 30 },
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{ x: 0, y: 30 }
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]
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const afterD1 = clipPolygon(subject, d1)
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expect(afterD1).not.toBeNull()
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const clipped = afterD1 ? clipPolygon(afterD1, d2) : null
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expect(clipped).not.toBeNull()
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expect(clipped?.length).toBeGreaterThanOrEqual(3)
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let minX = Infinity
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let minY = Infinity
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let maxX = -Infinity
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let maxY = -Infinity
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for (const p of clipped ?? []) {
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if (p.x < minX) minX = p.x
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if (p.y < minY) minY = p.y
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if (p.x > maxX) maxX = p.x
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if (p.y > maxY) maxY = p.y
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}
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// The corner (0,0) must stay excluded: the result does not reach below 20.
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expect(minX).toBeGreaterThanOrEqual(20)
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expect(minY).toBeGreaterThanOrEqual(20)
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expect(maxX).toBeLessThanOrEqual(30)
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expect(maxY).toBeLessThanOrEqual(30)
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})
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test('clipBoundsToPolygon agrees with clipPolygon for a single axis-aligned clip', () => {
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const bounds = { minX: 0, minY: 0, maxX: 100, maxY: 100 }
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const clip: Vector[] = [
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{ x: 25, y: 25 },
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{ x: 75, y: 25 },
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{ x: 75, y: 75 },
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{ x: 25, y: 75 }
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]
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const aabb = clipBoundsToPolygon(bounds, clip)
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expect(aabb).toEqual({ minX: 25, minY: 25, maxX: 75, maxY: 75 })
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})
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})
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