deepdata: core product code (backend, frontend, runtime, deepflow module)

deepflow/web/tests/markdown-katex.test.ts

@@ -0,0 +1,36 @@
+import katex from "katex";
+
+import { katexOptions } from "../src/core/markdown/katex";
+
+function render(expression: string) {
+  return katex.renderToString(expression, {
+    ...katexOptions,
+    displayMode: true,
+  });
+}
+
+describe("markdown physics katex support", () => {
+  it("renders vector calculus operators", () => {
+    expect(() => {
+      render("\\curl{\\vect{B}} = \\mu_0 \\vect{J} + \\mu_0 \\varepsilon_0 \\pdv{\\vect{E}}{t}");
+    }).not.toThrow();
+  });
+
+  it("renders quantum mechanics bra-ket notation", () => {
+    const html = render("\\braket{\\psi}{\\phi}");
+    expect(html.includes("⟨") && html.includes("⟩")).toBeTruthy();
+  });
+
+  it("renders vector magnitude formula with subscripts and square root", () => {
+    const html = render("(F_1) (F_2), (F=\\sqrt{F_1^2+F_2^2})");
+    expect(html.includes("F")).toBeTruthy();
+    expect(html.includes("₁") || html.includes("sub")).toBeTruthy(); // subscript check
+    expect(html.includes("√") || html.includes("sqrt")).toBeTruthy(); // square root check
+  });
+
+  it("renders chemical equations via mhchem", () => {
+    expect(() => {
+      render("\\ce{H2O ->[\\Delta] H+ + OH-}");
+    }).not.toThrow();
+  });
+});