test: highlight failing print scenario

test/binary/print.test.ts

@@ -0,0 +1,27 @@
+import type { Puzzle, SquareMarkup } from '../../src';
+import { printBinaryFile } from '../../src/binary/print';
+
+const MINIMAL_PUZZLE: Puzzle = {
+  height: 4,
+  width: 4,
+  solution: 'ABCDEFGHIJKLMNOP',
+  clues: ['1A', '1D', '2D', '3D', '4D', '5A', '6A', '7A'],
+  isScrambled: false,
+  misc: {
+    scrambledChecksum: undefined,
+  },
+};
+
+describe('printBinaryFile', () => {
+  it('prints a simple puzzle', () => {
+    expect(() => printBinaryFile(MINIMAL_PUZZLE)).not.toThrow();
+  });
+
+  it('prints a puzzle with a sparse markupGrid', () => {
+    const markupGrid: SquareMarkup[] = [];
+    markupGrid.length = MINIMAL_PUZZLE.solution.length;
+    markupGrid[4] = { unknown_08: true };
+
+    expect(() => printBinaryFile({ ...MINIMAL_PUZZLE, markupGrid })).not.toThrow();
+  });
+});