スペースに変更

Author: Goryudyuma

src/post/renderer.test.ts

@@ -488,9 +488,12 @@ describe("Renderer", () => {
     expect(labels.length).toBe(times.length);
     expect(labels[0]).toBe(firstLabel);
     expect(labels[labels.length - 1]).toBe(lastLabel);
+    const visibleLabelCount: number = labels.filter(
+      (label: string): boolean => label.trim().length > 0,
+    ).length;
+    expect(visibleLabelCount).toBeLessThanOrEqual(MAX_VISIBLE_TIME_LABELS);
     expect(
-      labels.filter((label: string): boolean => label.length > 0).length,
-    ).toBeLessThanOrEqual(MAX_VISIBLE_TIME_LABELS);
-    expect(labels.some((label: string): boolean => label === "")).toBe(true);
+      labels.some((label: string): boolean => label.trim().length === 0),
+    ).toBe(true);
   });
 });

src/post/renderer.ts

@@ -7,6 +7,7 @@ import type {
 } from "./lib";
 
 export const MAX_VISIBLE_TIME_LABELS: number = 12;
+const EMPTY_TIME_LABEL_PLACEHOLDER: string = " ";
 
 const formatTimeLabels = (times: Date[]): string[] => {
   if (times.length === 0) {
@@ -31,7 +32,9 @@ const formatTimeLabels = (times: Date[]): string[] => {
       }
 
       const normalizedIndex: number = index - 1;
-      return normalizedIndex % spacing === 0 ? label : "";
+      return normalizedIndex % spacing === 0
+        ? label
+        : EMPTY_TIME_LABEL_PLACEHOLDER;
     },
   );
 };