66 lines
3.6 KiB
TypeScript
66 lines
3.6 KiB
TypeScript
import { isJsonContentType, mediaTypeEssence } from '../../src/shared/mediaType.js';
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describe('mediaTypeEssence', () => {
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it('parses well-formed headers', () => {
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expect(mediaTypeEssence('application/json')).toBe('application/json');
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expect(mediaTypeEssence('text/event-stream; charset=utf-8')).toBe('text/event-stream');
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expect(mediaTypeEssence('Application/JSON; charset=utf-8')).toBe('application/json');
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});
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it('falls back to the pre-parameter segment for malformed parameter sections', () => {
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expect(mediaTypeEssence('application/json;')).toBe('application/json');
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expect(mediaTypeEssence('application/json; charset=')).toBe('application/json');
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expect(mediaTypeEssence('text/plain;')).toBe('text/plain');
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});
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it('returns undefined for missing or empty headers', () => {
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expect(mediaTypeEssence(null)).toBeUndefined();
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expect(mediaTypeEssence(undefined)).toBeUndefined();
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expect(mediaTypeEssence('')).toBeUndefined();
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expect(mediaTypeEssence(' ')).toBeUndefined();
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expect(mediaTypeEssence(';charset=utf-8')).toBeUndefined();
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});
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it('yields no essence for joined duplicate headers, with or without parameters', () => {
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// Headers.get() joins repeated headers with ', '. Without parameters
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// the comma lands in the first segment; with parameters it hides in
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// the tail — both must behave the same.
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expect(mediaTypeEssence('application/json, application/json')).toBe('application/json, application/json');
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expect(mediaTypeEssence('application/json; charset=utf-8, text/plain')).toBeUndefined();
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expect(mediaTypeEssence('application/json; charset=utf-8, application/json')).toBeUndefined();
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});
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});
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describe('isJsonContentType', () => {
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it('accepts application/json with or without parameters', () => {
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expect(isJsonContentType('application/json')).toBe(true);
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expect(isJsonContentType('application/json; charset=utf-8')).toBe(true);
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expect(isJsonContentType('Application/JSON')).toBe(true);
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expect(isJsonContentType(' application/json ; charset=utf-8')).toBe(true);
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});
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it('accepts unambiguous media types with malformed parameter sections', () => {
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expect(isJsonContentType('application/json;')).toBe(true);
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expect(isJsonContentType('application/json; charset=')).toBe(true);
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expect(isJsonContentType('application/json; charset=utf-8; charset=x')).toBe(true);
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});
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it('never matches on substrings: parameters and sibling types are not application/json', () => {
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expect(isJsonContentType('text/plain; a=application/json')).toBe(false);
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expect(isJsonContentType('text/plain;')).toBe(false);
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expect(isJsonContentType('text/plain, application/json')).toBe(false);
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expect(isJsonContentType('application/json, application/json')).toBe(false);
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expect(isJsonContentType('application/json; charset=utf-8, text/plain')).toBe(false);
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expect(isJsonContentType('text/plain; charset=utf-8, application/json')).toBe(false);
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expect(isJsonContentType('application/json-patch+json')).toBe(false);
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expect(isJsonContentType('application/jsonp')).toBe(false);
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});
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it('rejects missing, empty, and non-JSON types', () => {
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expect(isJsonContentType(null)).toBe(false);
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expect(isJsonContentType(undefined)).toBe(false);
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expect(isJsonContentType('')).toBe(false);
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expect(isJsonContentType('text/plain')).toBe(false);
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expect(isJsonContentType('multipart/form-data')).toBe(false);
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});
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});
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