Add math limit component (#2510)

src/file/paragraph/math/n-ary/math-limit-upper.spec.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it } from "vitest";
+
+import { Formatter } from "@export/formatter";
+
+import { MathRun } from "../math-run";
+import { MathLimitUpper } from "./math-limit-upper";
+
+describe("MathLimitUpper", () => {
+    describe("#constructor()", () => {
+        it("should create a MathLimitUpper with correct root key", () => {
+            const mathLimitUpper = new MathLimitUpper({
+                children: [new MathRun("x")],
+                limit: [new MathRun("-")],
+            });
+
+            const tree = new Formatter().format(mathLimitUpper);
+            expect(tree).to.deep.equal({
+                "m:limUpp": [
+                    {
+                        "m:e": [
+                            {
+                                "m:r": [
+                                    {
+                                        "m:t": ["x"],
+                                    },
+                                ],
+                            },
+                        ],
+                    },
+                    {
+                        "m:lim": [
+                            {
+                                "m:r": [
+                                    {
+                                        "m:t": ["-"],
+                                    },
+                                ],
+                            },
+                        ],
+                    },
+                ],
+            });
+        });
+    });
+});