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QrCode.test.md

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kind test
component QrCode
version 1

QrCode Tests

renders a QR code for a URL

data: "https://github.com"
(output is a multi-line block of █ ▀ ▄ and space characters)

output contains only block characters and spaces

data: "hello"
(every character in the output is one of: █ ▀ ▄ or space)

output has consistent line width

data: "test"
(all lines have equal character width)

Half-block encoding tests

These verify the cell-rendering logic that maps two vertical QR modules to a single terminal character.

both dark modules produce full block

top: true
bottom: true
expect: "█"

top dark, bottom light produces upper half block

top: true
bottom: false
expect: "▀"

top light, bottom dark produces lower half block

top: false
bottom: true
expect: "▄"

both light modules produce space

top: false
bottom: false
expect: " "

Placeholder bounds tests

These verify the center placeholder region calculation.

placeholder is centered in the QR grid

size: 25
margin: 1
expect:
  colStart: centered within size
  rowStart: centered within size
  width: ≤ 10
  height: ≤ 8
  rowStart_parity: matches margin parity

placeholder respects maximum dimensions

size: 40
margin: 1
expect:
  width: 10
  height: 8

small QR sizes shrink the placeholder

size: 6
margin: 1
expect:
  width: 6
  height: 6

rowStart aligns to margin parity for text-row boundaries

size: 25
margin: 1
expect:
  rowStart_parity: odd

size: 25
margin: 2
expect:
  rowStart_parity: even

Quiet zone tests

output includes 1-module quiet zone margin

data: "test"
(first row and first column of each line contain quiet zone spacing)

Error correction tests

uses High error correction level

data: "https://github.com"
(QR is generated with error correction level H, tolerating ~30% obscured modules)