Bug 1884891 - Display only private in tab strip when switched to private tab

app/src/main/java/org/mozilla/fenix/browser/tabstrip/TabStripState.kt

@@ -5,6 +5,7 @@
 package org.mozilla.fenix.browser.tabstrip
 
 import mozilla.components.browser.state.selector.getNormalOrPrivateTabs
+import mozilla.components.browser.state.selector.selectedTab
 import mozilla.components.browser.state.state.BrowserState
 
 /**
@@ -41,23 +42,22 @@ data class TabStripItem(
  * Converts [BrowserState] to [TabStripState] that contains the information needed to render the
  * tabs strip.
  *
- * @param isSelectDisabled When true, the tabs will show as selected.
+ * @param isSelectDisabled When true, the tabs will show as unselected.
  * @param isPrivateMode Whether or not the browser is in private mode.
  */
 internal fun BrowserState.toTabStripState(
     isSelectDisabled: Boolean,
     isPrivateMode: Boolean,
-): TabStripState {
-    return TabStripState(
-        tabs = getNormalOrPrivateTabs(isPrivateMode)
-            .map {
-                TabStripItem(
-                    id = it.id,
-                    title = it.content.title.ifBlank { it.content.url },
-                    url = it.content.url,
-                    isPrivate = it.content.private,
-                    isSelected = !isSelectDisabled && it.id == selectedTabId,
-                )
-            },
-    )
-}
+): TabStripState = TabStripState(
+    tabs = getNormalOrPrivateTabs(
+        private = isPrivateMode || (!isSelectDisabled && selectedTab?.content?.private == true),
+    ).map {
+        TabStripItem(
+            id = it.id,
+            title = it.content.title.ifBlank { it.content.url },
+            url = it.content.url,
+            isPrivate = it.content.private,
+            isSelected = !isSelectDisabled && it.id == selectedTabId,
+        )
+    },
+)

app/src/test/java/org/mozilla/fenix/browser/tabstrip/TabStripStateTest.kt

@@ -156,6 +156,55 @@ class TabStripStateTest {
         assertEquals(expected, actual)
     }
 
+    @Test
+    fun `WHEN isSelectDisabled is false and selected tab is private THEN tabs strip state tabs should have private tabs including the selected tab`() {
+        val browserState = BrowserState(
+            tabs = listOf(
+                createTab(
+                    url = "https://example.com",
+                    title = "Example 1",
+                    private = false,
+                    id = "1",
+                ),
+                createTab(
+                    url = "https://example2.com",
+                    title = "Example 2",
+                    private = true,
+                    id = "2",
+                ),
+                createTab(
+                    url = "https://example3.com",
+                    title = "Example 3",
+                    private = true,
+                    id = "3",
+                ),
+            ),
+            selectedTabId = "2",
+        )
+        val actual = browserState.toTabStripState(isSelectDisabled = false, isPrivateMode = false)
+
+        val expected = TabStripState(
+            tabs = listOf(
+                TabStripItem(
+                    id = "2",
+                    title = "Example 2",
+                    url = "https://example2.com",
+                    isSelected = true,
+                    isPrivate = true,
+                ),
+                TabStripItem(
+                    id = "3",
+                    title = "Example 3",
+                    url = "https://example3.com",
+                    isSelected = false,
+                    isPrivate = true,
+                ),
+            ),
+        )
+
+        assertEquals(expected, actual)
+    }
+
     @Test
     fun `WHEN isSelectDisabled is true THEN tabs strip state tabs should not have a selected tab`() {
         val browserState = BrowserState(