use https://github.com/nunocoracao/blowfish.git

themes/blowfish/assets/lib/mermaid/tests/MockedD3.d.ts

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+/**
+ * This is a mocked/stubbed version of the d3 Selection type. Each of the main functions are all
+ * mocked (via vi.fn()) so you can track if they have been called, etc.
+ *
+ * Note that node() returns a HTML Element with tag 'svg'. It is an empty element (no innerHTML, no children, etc).
+ * This potentially allows testing of mermaidAPI render().
+ */
+export declare class MockedD3 {
+    attribs: Map<string, string>;
+    id: string | undefined;
+    _children: MockedD3[];
+    _containingHTMLdoc: Document;
+    constructor(givenId?: string);
+    /** Helpful utility during development/debugging. This is not a real d3 function */
+    listChildren(): string;
+    select: import("@vitest/spy").Mock<any, any>;
+    selectAll: import("@vitest/spy").Mock<any, any>;
+    append: import("@vitest/spy").Mock<any, any>;
+    insert: (type: string, beforeSelector?: string, id?: string) => MockedD3;
+    attr(attrName: string): undefined | string;
+    attr(attrName: string, attrValue: string): MockedD3;
+    lower(attrValue?: string): this;
+    style(attrValue?: string): this;
+    text(attrValue?: string): this;
+    node: import("@vitest/spy").Mock<any, any>;
+    nodes: import("@vitest/spy").Mock<any, any>;
+    getBBox: () => {
+        x: string | number | undefined;
+        y: string | number | undefined;
+        width: string | number | undefined;
+        height: string | number | undefined;
+    };
+    insertBefore: import("@vitest/spy").Mock<any, any>;
+    curveBasis: import("@vitest/spy").Mock<any, any>;
+    curveBasisClosed: import("@vitest/spy").Mock<any, any>;
+    curveBasisOpen: import("@vitest/spy").Mock<any, any>;
+    curveLinear: import("@vitest/spy").Mock<any, any>;
+    curveLinearClosed: import("@vitest/spy").Mock<any, any>;
+    curveMonotoneX: import("@vitest/spy").Mock<any, any>;
+    curveMonotoneY: import("@vitest/spy").Mock<any, any>;
+    curveNatural: import("@vitest/spy").Mock<any, any>;
+    curveStep: import("@vitest/spy").Mock<any, any>;
+    curveStepAfter: import("@vitest/spy").Mock<any, any>;
+    curveStepBefore: import("@vitest/spy").Mock<any, any>;
+}

themes/blowfish/assets/lib/mermaid/tests/setup.d.ts

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+export {};

themes/blowfish/assets/lib/mermaid/tests/util.d.ts

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+export declare const convert: (template: TemplateStringsArray, ...params: unknown[]) => {
+    [k: string]: unknown;
+}[];