61 lines
1.9 KiB
TypeScript
61 lines
1.9 KiB
TypeScript
import {
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getNikonPictureControlFromMakerNote,
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} from '@/platforms/nikon/simulation';
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describe('Nikon', () => {
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describe('parsing', () => {
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it('extracts Picture Control Name from PictureControlData (0x0023)', () => {
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// Construct a mock Nikon MakerNote
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// Header: "Nikon\x00\x02\x00\x00\x00" (10 bytes)
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const header = Buffer.from('Nikon\x00\x02\x00\x00\x00', 'ascii');
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// TIFF Header at offset 10
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// II (Little Endian)
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const tiffHeader = Buffer.from(
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[0x49, 0x49, 0x2A, 0x00, 0x08, 0x00, 0x00, 0x00],
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);
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// IFD at offset 10 + 8 = 18
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// Count: 1 tag
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const ifdCount = Buffer.from([0x01, 0x00]);
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// Tag: PictureControlData (0x0023)
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// Type: Undefined (7)
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// Count: 108
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// Value/Offset: Offset to data
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const tagId = Buffer.from([0x23, 0x00]);
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const tagType = Buffer.from([0x07, 0x00]);
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const tagCount = Buffer.from([0x6C, 0x00, 0x00, 0x00]); // 108
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const tagOffset = Buffer.from([0x16, 0x00, 0x00, 0x00]); // 22
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const tag = Buffer.concat([tagId, tagType, tagCount, tagOffset]);
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// Data: 108 bytes
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// 0-3: Version
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// 4-7: Version
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// 8-27: Name (20 bytes)
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const data = Buffer.alloc(108);
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data.write('0310', 0);
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data.write('0310', 4);
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data.write('standard\0\0\0', 8); // Name at offset 8
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const makerNote = Buffer.concat([
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header,
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tiffHeader,
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ifdCount,
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tag,
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data,
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]);
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const pictureControl = getNikonPictureControlFromMakerNote(makerNote);
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expect(pictureControl).toBe('standard');
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});
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it('returns undefined for invalid header', () => {
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const makerNote = Buffer.from('Canon\x00\x02\x00\x00\x00', 'ascii');
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const pictureControl = getNikonPictureControlFromMakerNote(makerNote);
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expect(pictureControl).toBeUndefined();
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});
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});
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});
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