feat(ranking): 반응형 폭 스케일을 추가한다

app/src/test/java/kr/co/vividnext/sodalive/v2/widget/ranking/RankingResponsiveScaleTest.kt

@@ -0,0 +1,25 @@
+package kr.co.vividnext.sodalive.v2.widget.ranking
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class RankingResponsiveScaleTest {
+
+    @Test
+    fun `402dp 이상이면 scale 1을 반환한다`() {
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(402), 0.0001f)
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(430), 0.0001f)
+    }
+
+    @Test
+    fun `402dp 미만이면 device width와 기준 폭 비율을 반환한다`() {
+        assertEquals(360f / 402f, RankingResponsiveScale.fromScreenWidthDp(360), 0.0001f)
+        assertEquals(401f / 402f, RankingResponsiveScale.fromScreenWidthDp(401), 0.0001f)
+    }
+
+    @Test
+    fun `screen width를 확인할 수 없으면 scale 1을 반환한다`() {
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(0), 0.0001f)
+        assertEquals(1f, RankingResponsiveScale.fromScreenWidthDp(-1), 0.0001f)
+    }
+}