diff --git a/feature/calculator/build.gradle.kts b/feature/calculator/build.gradle.kts
index bf1e84b9..32c84c63 100644
--- a/feature/calculator/build.gradle.kts
+++ b/feature/calculator/build.gradle.kts
@@ -25,10 +25,14 @@ plugins {
 
 android {
     namespace = "com.sadellie.unitto.feature.calculator"
+    testOptions.unitTests.isIncludeAndroidResources = true
 }
 
 dependencies {
     testImplementation(libs.junit)
+    testImplementation(libs.org.robolectric)
+    androidTestImplementation(libs.androidx.compose.ui.test.junit4)
+    debugImplementation(libs.androidx.compose.ui.test.manifest)
 
     implementation(project(":data:common"))
     implementation(project(":data:userprefs"))
diff --git a/feature/calculator/src/androidTest/java/com/sadellie/unitto/feature/calculator/CalculatorScreenTest.kt b/feature/calculator/src/androidTest/java/com/sadellie/unitto/feature/calculator/CalculatorScreenTest.kt
new file mode 100644
index 00000000..9f1d1be0
--- /dev/null
+++ b/feature/calculator/src/androidTest/java/com/sadellie/unitto/feature/calculator/CalculatorScreenTest.kt
@@ -0,0 +1,101 @@
+/*
+ * Unitto is a unit converter for Android
+ * Copyright (c) 2023 Elshan Agaev
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.sadellie.unitto.feature.calculator
+
+import androidx.activity.ComponentActivity
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithTag
+import androidx.compose.ui.test.onNodeWithText
+import androidx.compose.ui.test.performClick
+import androidx.compose.ui.test.performTouchInput
+import androidx.compose.ui.test.swipeDown
+import com.sadellie.unitto.core.base.R
+import org.junit.Rule
+import org.junit.Test
+
+class CalculatorScreenTest {
+    @get:Rule
+    val composeTestRule = createAndroidComposeRule<ComponentActivity>()
+
+    @Test
+    fun loading_showLoadingKeyboard(): Unit = with(composeTestRule) {
+        setContent {
+            CalculatorScreen(
+                uiState = CalculatorUIState.Loading,
+                navigateToMenu = {},
+                navigateToSettings = {},
+                addTokens = {},
+                clearInput = {},
+                deleteTokens = {},
+                onCursorChange = {},
+                toggleCalculatorMode = {},
+                evaluate = {},
+                clearHistory = {}
+            )
+        }
+
+        onNodeWithTag("loading").assertExists()
+    }
+
+    @Test
+    fun ready_showRealKeyboard(): Unit = with(composeTestRule) {
+        setContent {
+            CalculatorScreen(
+                uiState = CalculatorUIState.Ready(),
+                navigateToMenu = {},
+                navigateToSettings = {},
+                addTokens = {},
+                clearInput = {},
+                deleteTokens = {},
+                onCursorChange = {},
+                toggleCalculatorMode = {},
+                evaluate = {},
+                clearHistory = {}
+            )
+        }
+
+        onNodeWithTag("loading").assertDoesNotExist()
+        onNodeWithTag("ready").assertExists()
+    }
+
+    @Test
+    fun ready_swipeForHistory(): Unit = with(composeTestRule) {
+        setContent {
+            CalculatorScreen(
+                uiState = CalculatorUIState.Ready(),
+                navigateToMenu = {},
+                navigateToSettings = {},
+                addTokens = {},
+                clearInput = {},
+                deleteTokens = {},
+                onCursorChange = {},
+                toggleCalculatorMode = {},
+                evaluate = {},
+                clearHistory = {}
+            )
+        }
+
+        onNodeWithTag("inputBox")
+            .performTouchInput { swipeDown() }
+        onNodeWithTag("historyButton")
+            .performClick()
+        onNodeWithText(composeTestRule.activity.getString(R.string.calculator_clear_history_support))
+            .assertExists()
+    }
+}
diff --git a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
index 5f6bb70b..d50325d7 100644
--- a/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
+++ b/feature/calculator/src/main/java/com/sadellie/unitto/feature/calculator/CalculatorScreen.kt
@@ -58,6 +58,8 @@ import androidx.compose.ui.platform.LocalConfiguration
 import androidx.compose.ui.platform.LocalDensity
 import androidx.compose.ui.platform.LocalFocusManager
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.semantics.semantics
+import androidx.compose.ui.semantics.testTag
 import androidx.compose.ui.text.TextRange
 import androidx.compose.ui.text.input.TextFieldValue
 import androidx.compose.ui.tooling.preview.Preview
@@ -84,30 +86,57 @@ internal fun CalculatorRoute(
     navigateToSettings: () -> Unit,
     viewModel: CalculatorViewModel = hiltViewModel()
 ) {
-    val uiState = viewModel.uiState.collectAsStateWithLifecycle().value
+    val uiState = viewModel.uiState.collectAsStateWithLifecycle()
 
+    CalculatorScreen(
+        uiState = uiState.value,
+        navigateToMenu = navigateToMenu,
+        navigateToSettings = navigateToSettings,
+        addTokens = viewModel::addTokens,
+        clearInput = viewModel::clearInput,
+        deleteTokens = viewModel::deleteTokens,
+        onCursorChange = viewModel::onCursorChange,
+        toggleCalculatorMode = viewModel::toggleCalculatorMode,
+        evaluate = viewModel::evaluate,
+        clearHistory = viewModel::clearHistory
+    )
+}
+
+@Composable
+internal fun CalculatorScreen(
+    uiState: CalculatorUIState,
+    navigateToMenu: () -> Unit,
+    navigateToSettings: () -> Unit,
+    addTokens: (String) -> Unit,
+    clearInput: () -> Unit,
+    deleteTokens: () -> Unit,
+    onCursorChange: (TextRange) -> Unit,
+    toggleCalculatorMode: () -> Unit,
+    evaluate: () -> Unit,
+    clearHistory: () -> Unit
+) {
     when (uiState) {
         is CalculatorUIState.Loading -> Loading(
             navigateToMenu = navigateToMenu,
             navigateToSettings = navigateToSettings,
         )
-        is CalculatorUIState.Ready -> CalculatorScreen(
+        is CalculatorUIState.Ready -> Ready(
             uiState = uiState,
             navigateToMenu = navigateToMenu,
             navigateToSettings = navigateToSettings,
-            addSymbol = viewModel::addTokens,
-            clearSymbols = viewModel::clearInput,
-            deleteSymbol = viewModel::deleteTokens,
-            onCursorChange = viewModel::onCursorChange,
-            toggleAngleMode = viewModel::toggleCalculatorMode,
-            evaluate = viewModel::evaluate,
-            clearHistory = viewModel::clearHistory
+            addSymbol = addTokens,
+            clearSymbols = clearInput,
+            deleteSymbol = deleteTokens,
+            onCursorChange = onCursorChange,
+            toggleAngleMode = toggleCalculatorMode,
+            evaluate = evaluate,
+            clearHistory = clearHistory
         )
     }
 }
 
 @Composable
-private fun CalculatorScreen(
+private fun Ready(
     uiState: CalculatorUIState.Ready,
     navigateToMenu: () -> Unit,
     navigateToSettings: () -> Unit,
@@ -137,7 +166,8 @@ private fun CalculatorScreen(
                                 Icons.Default.Delete,
                                 stringResource(R.string.calculator_clear_history_title)
                             )
-                        }
+                        },
+                        modifier = Modifier.semantics { testTag = "historyButton" }
                     )
                 } else {
                     SettingsButton(navigateToSettings)
@@ -202,7 +232,8 @@ private fun CalculatorScreen(
 
             // Input
             Column(
-                Modifier
+                modifier = Modifier
+                    .semantics { testTag = "inputBox" }
                     .offset(y = dragDp)
                     .height(textBoxHeight)
                     .background(
@@ -286,6 +317,7 @@ private fun CalculatorScreen(
             // Keyboard
             CalculatorKeyboard(
                 modifier = Modifier
+                    .semantics { testTag = "ready" }
                     .offset(y = dragDp + textBoxHeight)
                     .height(keyboardHeight)
                     .fillMaxWidth()
@@ -337,7 +369,7 @@ private fun CalculatorScreen(
 }
 
 @Composable
-private fun Loading(
+internal fun Loading(
     navigateToMenu: () -> Unit,
     navigateToSettings: () -> Unit,
 ) {
@@ -401,6 +433,7 @@ private fun Loading(
             // Keyboard
             CalculatorKeyboardLoading(
                 modifier = Modifier
+                    .semantics { testTag = "loading" }
                     .offset(y = maxHeight * 0.25f)
                     .height(maxHeight * 0.75f)
                     .fillMaxWidth()
@@ -446,11 +479,11 @@ private fun PreviewCalculatorScreen() {
         ),
         navigateToMenu = {},
         navigateToSettings = {},
-        addSymbol = {},
-        clearSymbols = {},
-        deleteSymbol = {},
+        addTokens = {},
+        clearInput = {},
+        deleteTokens = {},
         onCursorChange = {},
-        toggleAngleMode = {},
+        toggleCalculatorMode = {},
         evaluate = {},
         clearHistory = {}
     )