const summarize = require('../../summarize');

describe('summarize', () => {
    it('should export handlers', () => {
        expect(summarize.handlers).toBeDefined();
        expect(typeof summarize.handlers).toBe('object');
    });

    it('should export a newDoclet handler', () => {
        expect(summarize.handlers.newDoclet).toBeDefined();
        expect(typeof summarize.handlers.newDoclet).toBe('function');
    });

    describe('newDoclet handler', () => {
        const handler = summarize.handlers.newDoclet;

        it('should not blow up if the doclet is missing', () => {
            function noDoclet() {
                return handler({});
            }

            expect(noDoclet).not.toThrow();
        });

        it('should not change the summary if it is already defined', () => {
            const doclet = {
                summary: 'This is a summary.',
                description: 'Descriptions are good.'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).not.toBe(doclet.description);
        });

        it('should not do anything if the description is missing', () => {
            const doclet = {};

            handler({ doclet: doclet });

            expect(doclet.summary).not.toBeDefined();
        });

        it('should use the first sentence as the summary', () => {
            const doclet = {
                description: 'This sentence is the summary. This sentence is not.'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This sentence is the summary.');
        });

        it('should not add an extra period if there is only one sentence in the description', () => {
            const doclet = {
                description: 'This description has only one sentence.'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This description has only one sentence.');
        });

        it('should use the entire description, plus a period, as the summary if the description ' +
            'does not contain a period', () => {
            const doclet = {
                description: 'This is a description'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This is a description.');
        });

        it('should use the entire description as the summary if the description contains only ' +
            'one sentence', () => {
            const doclet = {
                description: 'This is a description.'
            };

            handler({ doclet: doclet });

            expect(doclet.description).toBe('This is a description.');
        });

        it('should work when an HTML tag immediately follows the first sentence', () => {
            const doclet = {
                description: 'This sentence is the summary.<small>This sentence is small.</small>'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This sentence is the summary.');
        });

        it('should generate valid HTML if a tag is opened, but not closed, in the summary', () => {
            const doclet = {
                description: 'This description has <em>a tag. The tag straddles</em> sentences.'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This description has <em>a tag.</em>');
        });

        it('should not include a <p> tag in the summary', () => {
            const doclet = {
                description: '<p>This description contains HTML.</p><p>And plenty of it!</p>'
            };

            handler({ doclet: doclet });

            expect(doclet.summary).toBe('This description contains HTML.');
        });
    });
});