From a755af2fcb2c203b6cba40ab8d3f5719f8a45fd2 Mon Sep 17 00:00:00 2001
From: Minji Kang <aldalddl2007@gmail.com>
Date: Mon, 13 Oct 2025 10:44:08 +0900
Subject: [PATCH] =?UTF-8?q?test:=20=EC=8B=A0=EA=B7=9C=EC=83=81=EC=9E=A5(<2?=
 =?UTF-8?q?4h)=20=EA=B7=9C=EC=B9=99=20=EB=B0=98=EC=98=81=ED=95=B4=20ChartV?=
 =?UTF-8?q?iewModel=20=EC=B6=95/=EC=8A=A4=ED=81=AC=EB=A1=A4=20=ED=85=8C?=
 =?UTF-8?q?=EC=8A=A4=ED=8A=B8=20=EC=88=98=EC=A0=95?=
MIME-Version: 1.0
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---
 .../iCoTests/ChartViewModel_Axis_Tests.swift  | 47 +++++++++++++++----
 1 file changed, 39 insertions(+), 8 deletions(-)

diff --git a/AIProject/iCoTests/ChartViewModel_Axis_Tests.swift b/AIProject/iCoTests/ChartViewModel_Axis_Tests.swift
index 6ec6b186..be23b60d 100644
--- a/AIProject/iCoTests/ChartViewModel_Axis_Tests.swift
+++ b/AIProject/iCoTests/ChartViewModel_Axis_Tests.swift
@@ -9,10 +9,11 @@ import XCTest
 @testable import iCo
 
 /// 차트 X축 도메인/초기 스크롤 시각 계산을 검증하는 테스트
-/// - 핵심: 상한은 "마지막 데이터 +5분"과 정확히 일치해야 하며,
-///       하한은 내부에서 Date()를 사용하는 특성상 (호출 시각 t0~t1) 사이의 -24h 범위여야 함.
 @MainActor
 final class ChartViewModel_Axis_Tests: XCTestCase {
+    /// 24h 미만(span < 24h)일 때:
+    /// - xAxisDomain == first...last
+    /// - scrollToTime == last
     func test_xAxisDomain_and_scrollToTime() {
         let base = Date()
         let last = base.addingTimeInterval(600) // +10분
@@ -20,7 +21,35 @@ final class ChartViewModel_Axis_Tests: XCTestCase {
                      makePrice(last, 110, 111) ]
 
         let vm = ChartViewModel(coin: .init(id: "KRW-SOL", koreanName: "솔라나"))
-
+        
+        let domain = vm.xAxisDomain(for: data)
+        
+        XCTAssertEqual(domain.lowerBound.timeIntervalSince1970,
+                       base.timeIntervalSince1970,
+                       accuracy: 1)
+        XCTAssertEqual(domain.upperBound.timeIntervalSince1970,
+                       last.timeIntervalSince1970,
+                       accuracy: 1)
+        XCTAssertEqual(vm.scrollToTime(for: data).timeIntervalSince1970,
+                       last.timeIntervalSince1970,
+                       accuracy: 1)
+    }
+    
+    /// 24h 이상(span ≥ 24h)일 때:
+    /// - xAxisDomain.lowerBound ≈ (now - 24h)
+    /// - xAxisDomain.upperBound == (last + 5m)
+    /// - scrollToTime == (last + 5m)
+    func test_xAxisDomain_and_scrollToTime_whenSpanIs24hOrMore() {
+        let base = Date()
+        // first = base, last = base + 24h + 10m  ⇒ span ≥ 24h
+        let last = base.addingTimeInterval(24*60*60 + 10*60)
+        let data = [
+            makePrice(base, 100, 100),
+            makePrice(last, 110, 111)
+        ]
+        
+        let vm = ChartViewModel(coin: .init(id: "KRW-SOL", koreanName: "솔라나"))
+        
         // 호출 전후 now 경계 캡처
         let t0 = Date()
         let domain = vm.xAxisDomain(for: data)
@@ -31,12 +60,14 @@ final class ChartViewModel_Axis_Tests: XCTestCase {
         let expectedUpper    = last.addingTimeInterval(60 * 5)
 
         XCTAssert(domain.lowerBound >= expectedLowerMin && domain.lowerBound <= expectedLowerMax,
-                  "lowerBound이 호출 시각 기준 24h 윈도우와 일치해야 함")
-        XCTAssertEqual(domain.upperBound.timeIntervalSince1970, expectedUpper.timeIntervalSince1970, accuracy: 1)
-
-        // 초기 스크롤 지점은 마지막 데이터 +5분
+                  "lowerBound는 호출 시각(now) 기준 -24h 범위여야 함")
+        XCTAssertEqual(domain.upperBound.timeIntervalSince1970,
+                       expectedUpper.timeIntervalSince1970,
+                       accuracy: 1,
+                       "upperBound는 last+5m 이어야 함")
         XCTAssertEqual(vm.scrollToTime(for: data).timeIntervalSince1970,
                        expectedUpper.timeIntervalSince1970,
-                       accuracy: 1)
+                       accuracy: 1,
+                       "scrollToTime은 24h 이상일 때 last+5m이어야 함")
     }
 }