mermaid/packages/mermaid/src/diagram.spec.ts

102 lines
3.5 KiB
TypeScript

import { describe, test, expect } from 'vitest';
import { Diagram } from './Diagram.js';
import { addDetector } from './diagram-api/detectType.js';
import { addDiagrams } from './diagram-api/diagram-orchestration.js';
import type { DiagramLoader } from './diagram-api/types.js';
addDiagrams();
const getDummyDiagram = (id: string, title?: string): Awaited<ReturnType<DiagramLoader>> => {
return {
id,
diagram: {
db: {
getDiagramTitle: () => title ?? id,
},
parser: {
parse: () => {
// no-op
},
},
renderer: {
draw: () => {
// no-op
},
},
styles: {},
},
};
};
describe('diagram detection', () => {
test('should detect inbuilt diagrams', async () => {
const graph = (await Diagram.fromText('graph TD; A-->B')) as Diagram;
expect(graph).toBeInstanceOf(Diagram);
expect(graph.type).toBe('flowchart-v2');
const sequence = (await Diagram.fromText(
'sequenceDiagram; Alice->>+John: Hello John, how are you?'
)) as Diagram;
expect(sequence).toBeInstanceOf(Diagram);
expect(sequence.type).toBe('sequence');
});
test('should detect external diagrams', async () => {
addDetector(
'loki',
(str) => str.startsWith('loki'),
() => Promise.resolve(getDummyDiagram('loki'))
);
const diagram = await Diagram.fromText('loki TD; A-->B');
expect(diagram).toBeInstanceOf(Diagram);
expect(diagram.type).toBe('loki');
});
test('should allow external diagrams to override internal ones with same ID', async () => {
const title = 'overridden';
addDetector(
'flowchart-elk',
(str) => str.startsWith('flowchart-elk'),
() => Promise.resolve(getDummyDiagram('flowchart-elk', title))
);
const diagram = await Diagram.fromText('flowchart-elk TD; A-->B');
expect(diagram).toBeInstanceOf(Diagram);
expect(diagram.db.getDiagramTitle?.()).toBe(title);
});
test('should throw the right error for incorrect diagram', async () => {
await expect(Diagram.fromText('graph TD; A-->')).rejects.toThrowErrorMatchingInlineSnapshot(`
[Error: Parse error on line 2:
graph TD; A-->
--------------^
Expecting 'AMP', 'COLON', 'PIPE', 'TESTSTR', 'DOWN', 'DEFAULT', 'NUM', 'COMMA', 'NODE_STRING', 'BRKT', 'MINUS', 'MULT', 'UNICODE_TEXT', got 'EOF']
`);
await expect(Diagram.fromText('sequenceDiagram; A-->B')).rejects
.toThrowErrorMatchingInlineSnapshot(`
[Error: Parse error on line 1:
...quenceDiagram; A-->B
-----------------------^
Expecting 'TXT', got 'NEWLINE']
`);
});
test('should throw the right error for unregistered diagrams', async () => {
await expect(Diagram.fromText('thor TD; A-->B')).rejects.toThrowErrorMatchingInlineSnapshot(
`[UnknownDiagramError: No diagram type detected matching given configuration for text: thor TD; A-->B]`
);
});
test('should consider entity codes when present in diagram defination', async () => {
const diagram = await Diagram.fromText(`sequenceDiagram
A->>B: I #9829; you!
B->>A: I #9829; you #infin; times more!`);
// @ts-ignore: we need to add types for sequenceDb which will be done in separate PR
const messages = diagram.db?.getMessages?.();
if (!messages) {
throw new Error('Messages not found!');
}
expect(messages[0].message).toBe('I fl°°9829¶ß you!');
expect(messages[1].message).toBe('I fl°°9829¶ß you fl°infin¶ß times more!');
});
});