tests: Add tests for wrapText util (#4495)

src/element/textElement.ts

@@ -1,4 +1,4 @@
-import { getFontString, arrayToMap } from "../utils";
+import { getFontString, arrayToMap, isTestEnv } from "../utils";
 import {
   ExcalidrawBindableElement,
   ExcalidrawElement,
@@ -200,6 +200,12 @@ const getTextWidth = (text: string, font: FontString) => {
   canvas2dContext.font = font;
 
   const metrics = canvas2dContext.measureText(text);
+  // since in test env the canvas measureText algo
+  // doesn't measure text and instead just returns number of
+  // characters hence we assume that each letteris 10px
+  if (isTestEnv()) {
+    return metrics.width * 10;
+  }
 
   return metrics.width;
 };