refactor: Convert flowDB to TS

packages/mermaid/src/diagrams/flowchart/flowDb.spec.js → packages/mermaid/src/diagrams/flowchart/flowDb.spec.ts

@@ -1,14 +1,15 @@
 import flowDb from './flowDb.js';
+import type { FlowSubGraph } from './types.js';
 
 describe('flow db subgraphs', () => {
-  let subgraphs;
+  let subgraphs: FlowSubGraph[];
   beforeEach(() => {
     subgraphs = [
       { nodes: ['a', 'b', 'c', 'e'] },
       { nodes: ['f', 'g', 'h'] },
       { nodes: ['i', 'j'] },
       { nodes: ['k'] },
-    ];
+    ] as FlowSubGraph[];
   });
   describe('exist', () => {
     it('should return true when the is exists in a subgraph', () => {
@@ -25,17 +26,17 @@ describe('flow db subgraphs', () => {
 
   describe('makeUniq', () => {
     it('should remove ids from sungraph that already exists in another subgraph even if it gets empty', () => {
-      const subgraph = flowDb.makeUniq({ nodes: ['i', 'j'] }, subgraphs);
+      const subgraph = flowDb.makeUniq({ nodes: ['i', 'j'] } as FlowSubGraph, subgraphs);
 
       expect(subgraph.nodes).toEqual([]);
     });
     it('should remove ids from sungraph that already exists in another subgraph', () => {
-      const subgraph = flowDb.makeUniq({ nodes: ['i', 'j', 'o'] }, subgraphs);
+      const subgraph = flowDb.makeUniq({ nodes: ['i', 'j', 'o'] } as FlowSubGraph, subgraphs);
 
       expect(subgraph.nodes).toEqual(['o']);
     });
     it('should not remove ids from subgraph if they are unique', () => {
-      const subgraph = flowDb.makeUniq({ nodes: ['q', 'r', 's'] }, subgraphs);
+      const subgraph = flowDb.makeUniq({ nodes: ['q', 'r', 's'] } as FlowSubGraph, subgraphs);
 
       expect(subgraph.nodes).toEqual(['q', 'r', 's']);
     });