import { DataFactory } from 'n3'; import { BasicRepresentation } from '../../../../src/http/representation/BasicRepresentation'; import type { Representation } from '../../../../src/http/representation/Representation'; import { RepresentationMetadata } from '../../../../src/http/representation/RepresentationMetadata'; import type { RepresentationPreferences } from '../../../../src/http/representation/RepresentationPreferences'; import { DynamicJsonToTemplateConverter } from '../../../../src/storage/conversion/DynamicJsonToTemplateConverter'; import type { RepresentationConverterArgs } from '../../../../src/storage/conversion/RepresentationConverter'; import { NotImplementedHttpError } from '../../../../src/util/errors/NotImplementedHttpError'; import { readableToString } from '../../../../src/util/StreamUtil'; import type { TemplateEngine } from '../../../../src/util/templates/TemplateEngine'; import { CONTENT_TYPE_TERM, SOLID_META } from '../../../../src/util/Vocabularies'; import namedNode = DataFactory.namedNode; describe('A DynamicJsonToTemplateConverter', (): void => { const templateFile = '/path/to/template.html.ejs'; const identifier = { path: 'http://test.com/foo' }; let representation: Representation; let preferences: RepresentationPreferences; let input: RepresentationConverterArgs; let templateEngine: jest.Mocked; let converter: DynamicJsonToTemplateConverter; beforeEach(async(): Promise => { representation = new BasicRepresentation('{ "json": true }', identifier, 'application/json'); // Create dummy template metadata const templateNode = namedNode(templateFile); representation.metadata.add(SOLID_META.terms.template, templateNode); representation.metadata.addQuad(templateNode, CONTENT_TYPE_TERM, 'text/html'); preferences = { type: { 'text/html': 1 }}; input = { identifier, representation, preferences }; templateEngine = { render: jest.fn().mockReturnValue(Promise.resolve('')), }; converter = new DynamicJsonToTemplateConverter(templateEngine); }); it('can only handle JSON data.', async(): Promise => { representation.metadata.contentType = 'text/plain'; await expect(converter.canHandle(input)).rejects.toThrow('Only JSON data is supported'); }); it('can only handle preferences matching the templates found.', async(): Promise => { input.preferences = { type: { 'text/plain': 1 }}; await expect(converter.canHandle(input)).rejects.toThrow('No templates found matching text/plain, only text/html'); }); it('can handle JSON input with templates matching the preferences.', async(): Promise => { await expect(converter.canHandle(input)).resolves.toBeUndefined(); }); it('rejects JSON input if no templates are defined.', async(): Promise => { preferences.type = { 'application/json': 1 }; representation.metadata = new RepresentationMetadata('application/json'); await expect(converter.canHandle(input)).rejects.toThrow(NotImplementedHttpError); }); it('uses the input JSON as parameters for the matching template.', async(): Promise => { const result = await converter.handle(input); await expect(readableToString(result.data)).resolves.toBe(''); expect(result.binary).toBe(true); expect(result.metadata.contentType).toBe('text/html'); expect(templateEngine.render).toHaveBeenCalledTimes(1); expect(templateEngine.render).toHaveBeenLastCalledWith({ json: true }, { templateFile }); }); it('supports missing type preferences.', async(): Promise => { input.preferences = {}; const result = await converter.handle(input); await expect(readableToString(result.data)).resolves.toBe(''); }); it('returns the input representation if JSON is preferred.', async(): Promise => { input.preferences.type = { 'application/json': 1, 'text/html': 0.5 }; await expect(converter.handle(input)).resolves.toBe(input.representation); }); it('still converts if JSON is preferred but there is a JSON template.', async(): Promise => { input.preferences.type = { 'application/json': 1 }; const templateNode = namedNode(templateFile); representation.metadata.add(SOLID_META.terms.template, templateNode); representation.metadata.addQuad(templateNode, CONTENT_TYPE_TERM, 'application/json'); const result = await converter.handle(input); await expect(readableToString(result.data)).resolves.toBe(''); expect(result.metadata.contentType).toBe('application/json'); }); });