feat(widget): 공통 탭바와 타이틀바 컴포넌트를 추가한다

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

@@ -0,0 +1,48 @@
+package kr.co.vividnext.sodalive.v2.widget
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertThrows
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class CapsuleTabSelectionStateTest {
+
+    @Test
+    fun `create keeps one selected tab with one or more menus`() {
+        val state = CapsuleTabSelectionState.create(listOf("추천", "랭킹", "팔로잉"), selectedIndex = 2)
+
+        assertEquals(listOf("추천", "랭킹", "팔로잉"), state.menus)
+        assertEquals(2, state.selectedIndex)
+        assertFalse(state.isSelected(0))
+        assertFalse(state.isSelected(1))
+        assertTrue(state.isSelected(2))
+    }
+
+    @Test
+    fun `create rejects empty menus`() {
+        assertThrows(IllegalArgumentException::class.java) {
+            CapsuleTabSelectionState.create(emptyList())
+        }
+    }
+
+    @Test
+    fun `create normalizes out of range selected index to first menu`() {
+        val state = CapsuleTabSelectionState.create(listOf("추천", "랭킹"), selectedIndex = 5)
+
+        assertEquals(0, state.selectedIndex)
+        assertTrue(state.isSelected(0))
+        assertFalse(state.isSelected(1))
+    }
+
+    @Test
+    fun `select changes selected tab`() {
+        val state = CapsuleTabSelectionState.create(listOf("추천", "랭킹", "팔로잉"))
+            .select(1)
+
+        assertEquals(1, state.selectedIndex)
+        assertFalse(state.isSelected(0))
+        assertTrue(state.isSelected(1))
+        assertFalse(state.isSelected(2))
+    }
+}

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

@@ -0,0 +1,51 @@
+package kr.co.vividnext.sodalive.v2.widget
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertThrows
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class TextTabSelectionStateTest {
+
+    @Test
+    fun `create keeps one selected tab within one to three menus`() {
+        val state = TextTabSelectionState.create(listOf("홈", "랭킹", "마이"), selectedIndex = 1)
+
+        assertEquals(listOf("홈", "랭킹", "마이"), state.menus)
+        assertEquals(1, state.selectedIndex)
+        assertFalse(state.isSelected(0))
+        assertTrue(state.isSelected(1))
+        assertFalse(state.isSelected(2))
+    }
+
+    @Test
+    fun `create rejects empty or more than three menus`() {
+        assertThrows(IllegalArgumentException::class.java) {
+            TextTabSelectionState.create(emptyList())
+        }
+        assertThrows(IllegalArgumentException::class.java) {
+            TextTabSelectionState.create(listOf("1", "2", "3", "4"))
+        }
+    }
+
+    @Test
+    fun `create normalizes out of range selected index to first menu`() {
+        val state = TextTabSelectionState.create(listOf("홈", "랭킹"), selectedIndex = 3)
+
+        assertEquals(0, state.selectedIndex)
+        assertTrue(state.isSelected(0))
+        assertFalse(state.isSelected(1))
+    }
+
+    @Test
+    fun `select changes selected tab and keeps only one selected`() {
+        val state = TextTabSelectionState.create(listOf("홈", "랭킹", "마이"))
+            .select(2)
+
+        assertEquals(2, state.selectedIndex)
+        assertFalse(state.isSelected(0))
+        assertFalse(state.isSelected(1))
+        assertTrue(state.isSelected(2))
+    }
+}