fix: getDefaultLineHeight should return default font family line height for unknown font (#6399)

* fix(getDefaultLineHeight): make getDefaultLineHeight always has a default value

* test: add getDefaultLineHeight test case when using unknown font

* test: add getDefaultLineHeight test case when using unknown font

* Revert "test: add getDefaultLineHeight test case when using unknown font"

This reverts commit d41da5493b6edab9e599a13a23c387d38345bf03.

* test: add getDefaultLineHeight test case when using unknown font

* newline

* newline

* tweaks

* trigger action

* trigger action

* fix

---------

Co-authored-by: Aakansha Doshi <aakansha1216@gmail.com>

src/element/textElement.test.ts

@@ -332,6 +332,12 @@ describe("Test getDefaultLineHeight", () => {
     //@ts-ignore
     expect(getDefaultLineHeight()).toBe(1.25);
   });
+
+  it("should return line height using default font family for unknown font", () => {
+    const UNKNOWN_FONT = 5;
+    expect(getDefaultLineHeight(UNKNOWN_FONT)).toBe(1.25);
+  });
+
   it("should return correct line height", () => {
     expect(getDefaultLineHeight(FONT_FAMILY.Cascadia)).toBe(1.2);
   });

src/element/textElement.ts

@@ -887,7 +887,7 @@ const DEFAULT_LINE_HEIGHT = {
 };
 
 export const getDefaultLineHeight = (fontFamily: FontFamilyValues) => {
-  if (fontFamily) {
+  if (fontFamily in DEFAULT_LINE_HEIGHT) {
     return DEFAULT_LINE_HEIGHT[fontFamily];
   }
   return DEFAULT_LINE_HEIGHT[DEFAULT_FONT_FAMILY];