From 3b5c50184dbfd20d552982a8e58a1e6c94dc2190 Mon Sep 17 00:00:00 2001
From: water <672684719@qq.com>
Date: Mon, 10 Aug 2026 09:19:18 +0800
Subject: [PATCH 1/2] test(formatXlm): add edge case coverage for large
 numbers, fractional amounts, and negative values

---
 __tests__/lib/formatXlm.test.ts | 33 ---------------------------------
 1 file changed, 33 deletions(-)

diff --git a/__tests__/lib/formatXlm.test.ts b/__tests__/lib/formatXlm.test.ts
index 07a576e9..e69de29b 100644
--- a/__tests__/lib/formatXlm.test.ts
+++ b/__tests__/lib/formatXlm.test.ts
@@ -1,33 +0,0 @@
-import { formatXlm, XLM_DISPLAY_DECIMALS } from '@/lib/formatXlm';
-
-describe('formatXlm', () => {
-  it('formats whole numbers with the standard decimal precision', () => {
-    expect(formatXlm(1)).toBe('1.00');
-    expect(formatXlm(12)).toBe('12.00');
-  });
-
-  it('rounds long trailing decimals to the configured precision', () => {
-    expect(formatXlm(4.999999)).toBe('5.00');
-    expect(formatXlm(1.006)).toBe('1.01');
-    expect(formatXlm(0.123456789)).toBe('0.12');
-  });
-
-  it('accepts numeric strings', () => {
-    expect(formatXlm('5')).toBe('5.00');
-    expect(formatXlm('7.5')).toBe('7.50');
-  });
-
-  it('falls back to zero for non-finite or unparsable input', () => {
-    expect(formatXlm(NaN)).toBe('0.00');
-    expect(formatXlm('not-a-number')).toBe('0.00');
-  });
-
-  it('handles zero', () => {
-    expect(formatXlm(0)).toBe('0.00');
-  });
-
-  it('uses the exported precision constant', () => {
-    expect(XLM_DISPLAY_DECIMALS).toBe(2);
-    expect(formatXlm(3.14159).split('.')[1]).toHaveLength(XLM_DISPLAY_DECIMALS);
-  });
-});

From 87425d185a5f5d057c6a2b931aa8729c6770858f Mon Sep 17 00:00:00 2001
From: water <672684719@qq.com>
Date: Mon, 10 Aug 2026 09:19:45 +0800
Subject: [PATCH 2/2] test(formatXlm): add edge case coverage for large
 numbers, fractional amounts, and negative values

---
 __tests__/lib/formatXlm.test.ts | 50 +++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/__tests__/lib/formatXlm.test.ts b/__tests__/lib/formatXlm.test.ts
index e69de29b..57c60fae 100644
--- a/__tests__/lib/formatXlm.test.ts
+++ b/__tests__/lib/formatXlm.test.ts
@@ -0,0 +1,50 @@
+import { formatXlm, XLM_DISPLAY_DECIMALS } from '@/lib/formatXlm';
+
+describe('formatXlm', () => {
+  it('formats whole numbers with the standard decimal precision', () => {
+    expect(formatXlm(1)).toBe('1.00');
+    expect(formatXlm(12)).toBe('12.00');
+  });
+
+  it('rounds long trailing decimals to the configured precision', () => {
+    expect(formatXlm(4.999999)).toBe('5.00');
+    expect(formatXlm(1.006)).toBe('1.01');
+    expect(formatXlm(0.123456789)).toBe('0.12');
+  });
+
+  it('accepts numeric strings', () => {
+    expect(formatXlm('5')).toBe('5.00');
+    expect(formatXlm('7.5')).toBe('7.50');
+  });
+
+  it('falls back to zero for non-finite or unparsable input', () => {
+    expect(formatXlm(NaN)).toBe('0.00');
+    expect(formatXlm('not-a-number')).toBe('0.00');
+  });
+
+  it('handles zero', () => {
+    expect(formatXlm(0)).toBe('0.00');
+  });
+
+  it('uses the exported precision constant', () => {
+    expect(XLM_DISPLAY_DECIMALS).toBe(2);
+    expect(formatXlm(3.14159).split('.')[1]).toHaveLength(XLM_DISPLAY_DECIMALS);
+  });
+
+  it('handles very large XLM amounts without scientific notation', () => {
+    expect(formatXlm(1_000_000)).toBe('1000000.00');
+    expect(formatXlm(999999999)).toBe('999999999.00');
+  });
+
+  it('handles extremely small fractional amounts', () => {
+    expect(formatXlm(0.0000001)).toBe('0.00');
+    expect(formatXlm(0.004)).toBe('0.00');
+    expect(formatXlm(0.006)).toBe('0.01');
+  });
+
+  it('formats negative values with a minus sign', () => {
+    expect(formatXlm(-1)).toBe('-1.00');
+    expect(formatXlm(-0.5)).toBe('-0.50');
+    expect(formatXlm('-10')).toBe('-10.00');
+  });
+});
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