Updated on 2026-08-14

core/featuretoggles/build.gradle.kts

@@ -7,11 +7,16 @@ plugins {
 }
 
 dependencies {
-    implementation(deps.moshi)
-    implementation(deps.moshi.kotlin)
+    implementation(project(":core:datasource"))
+
     implementation(deps.hilt.android)
     kapt(deps.hilt.kapt)
+    implementation(deps.moshi)
+    implementation(deps.moshi.kotlin)
     implementation(deps.timber)
 
-    implementation(project(":core:datasource"))
+    testImplementation(deps.test.coroutine)
+    testImplementation(deps.test.junit)
+    testImplementation(deps.test.mockk)
+    testImplementation(deps.test.truth)
 }

core/featuretoggles/src/main/java/com/tangem/core/featuretoggle/FeatureToggle.kt

@@ -1,12 +0,0 @@
-package com.tangem.core.featuretoggle
-
-/**
- * Feature toggle
- *
-[REDACTED_AUTHOR]
- */
-interface FeatureToggle {
-
-    /** Feature toggle name */
-    val name: String
-}

core/featuretoggles/src/main/kotlin/com/tangem/core/featuretoggle/contract/Version.kt

@@ -1,5 +1,6 @@
 package com.tangem.core.featuretoggle.contract
 
+import androidx.annotation.VisibleForTesting
 import timber.log.Timber
 
 /**
@@ -23,6 +24,11 @@ internal class Version private constructor(value: String) : Comparable<Version>
         fix = versions.getOrNull(index = FIX_VERSION_POSITION)
     }
 
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    constructor(major: Int, minor: Int, fix: Int? = null) : this(
+        value = "$major.$minor${if (fix != null) ".$fix" else ""}",
+    )
+
     override fun compareTo(other: Version): Int {
         var result = major.compareTo(other.major)
         if (result == 0) result = minor.compareTo(other.minor)
@@ -41,6 +47,15 @@ internal class Version private constructor(value: String) : Comparable<Version>
         return getOrNull(index) ?: error("Invalid version")
     }
 
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getMajorVersion() = major
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getMinorVersion() = minor
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getFixVersion() = fix
+
     companion object {
         private const val MAJOR_VERSION_POSITION = 0
         private const val MINOR_VERSION_POSITION = 1
@@ -55,7 +70,7 @@ internal class Version private constructor(value: String) : Comparable<Version>
             return try {
                 Version(value)
             } catch (exception: Exception) {
-                Timber.e(exception, "Version %s is null", value)
+                Timber.e(exception, "Invalid version - %s", value)
                 return null
             }
         }

core/featuretoggles/src/main/kotlin/com/tangem/core/featuretoggle/manager/DevFeatureTogglesManager.kt

@@ -1,7 +1,7 @@
 package com.tangem.core.featuretoggle.manager
 
+import androidx.annotation.VisibleForTesting
 import com.squareup.moshi.JsonAdapter
-import com.tangem.core.featuretoggle.FeatureToggle
 import com.tangem.core.featuretoggle.storage.FeatureTogglesStorage
 import com.tangem.core.featuretoggle.utils.associateToggles
 import com.tangem.core.featuretoggle.version.VersionProvider
@@ -42,7 +42,7 @@ internal class DevFeatureTogglesManager(
             .toMutableMap()
     }
 
-    override fun isFeatureEnabled(toggle: FeatureToggle): Boolean = featureTogglesMap.any { it.key == toggle.name }
+    override fun isFeatureEnabled(name: String): Boolean = featureTogglesMap.any { it.key == name }
 
     override fun getFeatureToggles(): Map<String, Boolean> = featureTogglesMap
 
@@ -51,4 +51,9 @@ internal class DevFeatureTogglesManager(
         featureTogglesMap[name] = isEnabled
         appPreferenceStorage.featureToggles = jsonAdapter.toJson(featureTogglesMap)
     }
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun setFeatureToggles(map: MutableMap<String, Boolean>) {
+        featureTogglesMap = map
+    }
 }

core/featuretoggles/src/main/kotlin/com/tangem/core/featuretoggle/manager/FeatureTogglesManager.kt

@@ -1,7 +1,5 @@
 package com.tangem.core.featuretoggle.manager
 
-import com.tangem.core.featuretoggle.FeatureToggle
-
 /**
  * Component for getting information about the availability of feature toggles
  *
@@ -12,6 +10,6 @@ interface FeatureTogglesManager {
     /** Initialize manager */
     suspend fun init()
 
-    /** Check feature toggle [toggle] availability */
-    fun isFeatureEnabled(toggle: FeatureToggle): Boolean
+    /** Check feature toggle availability by name [name] */
+    fun isFeatureEnabled(name: String): Boolean
 }

core/featuretoggles/src/main/kotlin/com/tangem/core/featuretoggle/manager/ProdFeatureTogglesManager.kt

@@ -1,6 +1,6 @@
 package com.tangem.core.featuretoggle.manager
 
-import com.tangem.core.featuretoggle.FeatureToggle
+import androidx.annotation.VisibleForTesting
 import com.tangem.core.featuretoggle.storage.FeatureTogglesStorage
 import com.tangem.core.featuretoggle.utils.associateToggles
 import com.tangem.core.featuretoggle.version.VersionProvider
@@ -25,5 +25,13 @@ internal class ProdFeatureTogglesManager(
             .associateToggles(currentVersion = versionProvider.get() ?: "")
     }
 
-    override fun isFeatureEnabled(toggle: FeatureToggle): Boolean = featureToggles.any { it.key == toggle.name }
+    override fun isFeatureEnabled(name: String): Boolean = featureToggles.any { it.key == name }
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getProdFeatureToggles() = featureToggles
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun setProdFeatureToggles(map: Map<String, Boolean>) {
+        featureToggles = map
+    }
 }

core/featuretoggles/src/main/kotlin/com/tangem/core/featuretoggle/storage/LocalFeatureTogglesStorage.kt

@@ -1,5 +1,6 @@
 package com.tangem.core.featuretoggle.storage
 
+import androidx.annotation.VisibleForTesting
 import com.squareup.moshi.JsonAdapter
 import com.tangem.core.featuretoggle.storage.LocalFeatureTogglesStorage.Companion.LOCAL_CONFIG_PATH
 import com.tangem.datasource.asset.AssetReader
@@ -29,6 +30,12 @@ internal class LocalFeatureTogglesStorage(
             .onFailure { Timber.e(LocalFeatureTogglesStorage::class.java.name, "Failed to parse $LOCAL_CONFIG_PATH") }
     }
 
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getConfigPath() = LOCAL_CONFIG_PATH
+
+    @VisibleForTesting(otherwise = VisibleForTesting.NONE)
+    fun getFeatureToggles(): Iterable<FeatureToggle> = featureToggles
+
     private companion object {
         const val LOCAL_CONFIG_PATH: String = "configs/feature_toggles_config"
     }

core/featuretoggles/src/test/kotlin/com/tangem/core/featuretoggle/contract/VersionAvailabilityContractTest.kt

@@ -0,0 +1,70 @@
+package com.tangem.core.featuretoggle.contract
+
+import com.google.common.truth.Truth
+import org.junit.Test
+
+/**
+[REDACTED_AUTHOR]
+ */
+internal class VersionAvailabilityContractTest {
+
+    @Test
+    fun `local version is undefined`() {
+        val currentVersion = "0.0.0"
+        val localVersion = "undefined"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isFalse()
+    }
+
+    @Test
+    fun `invalid current version`() {
+        val currentVersion = ".0.0"
+        val localVersion = "0.0.0"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isFalse()
+    }
+
+    @Test
+    fun `invalid local version`() {
+        val currentVersion = "0.0.0"
+        val localVersion = ".0.0"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isFalse()
+    }
+
+    @Test
+    fun `current version is greater than local version`() {
+        val currentVersion = "1.0.0"
+        val localVersion = "0.0.0"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isTrue()
+    }
+
+    @Test
+    fun `current version is equal to local version`() {
+        val currentVersion = "0.0.1"
+        val localVersion = "0.0.1"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isTrue()
+    }
+
+    @Test
+    fun `current version is less than local version`() {
+        val currentVersion = "0.0.0"
+        val localVersion = "0.1.0"
+
+        val actual = VersionAvailabilityContract.invoke(currentVersion, localVersion)
+
+        Truth.assertThat(actual).isFalse()
+    }
+}

core/featuretoggles/src/test/kotlin/com/tangem/core/featuretoggle/contract/VersionTest.kt

@@ -0,0 +1,121 @@
+package com.tangem.core.featuretoggle.contract
+
+import com.google.common.truth.Truth
+import org.junit.Test
+
+/**
+[REDACTED_AUTHOR]
+ */
+internal class VersionTest {
+
+    @Test
+    fun `right versions order`() {
+        val major = 1
+        val minor = 2
+        val fix = 3
+        val versionString = "$major.$minor.$fix"
+
+        val version = Version.create(versionString)
+
+        Truth.assertThat(version?.getMajorVersion()).isEqualTo(major)
+        Truth.assertThat(version?.getMinorVersion()).isEqualTo(minor)
+        Truth.assertThat(version?.getFixVersion()).isEqualTo(fix)
+    }
+
+    @Test
+    fun `major version skipped`() {
+        Truth.assertThat(Version.create(".0.0")).isNull()
+    }
+
+    @Test
+    fun `minor version skipped`() {
+        Truth.assertThat(Version.create("0..0")).isNull()
+    }
+
+    @Test
+    fun `fix version skipped`() {
+        Truth.assertThat(Version.create("0.0.")).isNull()
+    }
+
+    @Test
+    fun `optional fix version`() {
+        val actual = Version.create("0.0")
+        val expected = Version(major = 0, minor = 0)
+
+        Truth.assertThat(actual).isEquivalentAccordingToCompareTo(expected)
+    }
+
+    @Test
+    fun `full form version`() {
+        val actual = Version.create("0.0.0")
+        val expected = Version(major = 0, minor = 0, fix = 0)
+
+        Truth.assertThat(actual).isEquivalentAccordingToCompareTo(expected)
+    }
+
+    @Test
+    fun `compareTo if major version of one is greater than the other`() {
+        val one = Version.create("1.0.0")
+        val other = Version(major = 0, minor = 1, fix = 1)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_GREATER_THAN_OTHER)
+    }
+
+    @Test
+    fun `compareTo if minor version of one is greater than the other`() {
+        val one = Version.create("1.1.0")
+        val other = Version(major = 1, minor = 0, fix = 1)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_GREATER_THAN_OTHER)
+    }
+
+    @Test
+    fun `compareTo if fix version of one is greater than the other`() {
+        val one = Version.create("1.1.1")
+        val other = Version(major = 1, minor = 1, fix = 0)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_GREATER_THAN_OTHER)
+    }
+
+    @Test
+    fun `compareTo if one and other's fix version skipped`() {
+        val one = Version.create("1.1")
+        val other = Version(major = 1, minor = 1)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_EQUAL_TO_OTHER)
+    }
+
+    @Test
+    fun `compareTo if one's fix version skipped`() {
+        val one = Version.create("1.1")
+        val other = Version(major = 1, minor = 1, fix = 0)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_LESS_THAN_OTHER)
+    }
+
+    @Test
+    fun `compareTo if other's fix version skipped`() {
+        val one = Version.create("1.1.0")
+        val other = Version(major = 1, minor = 1)
+
+        val actual = one?.compareTo(other)
+
+        Truth.assertThat(actual).isEqualTo(ONE_IS_GREATER_THAN_OTHER)
+    }
+
+    private companion object {
+        const val ONE_IS_GREATER_THAN_OTHER = 1
+        const val ONE_IS_EQUAL_TO_OTHER = 0
+        const val ONE_IS_LESS_THAN_OTHER = -1
+    }
+}

core/featuretoggles/src/test/kotlin/com/tangem/core/featuretoggle/manager/DevFeatureTogglesManagerTest.kt

@@ -0,0 +1,242 @@
+package com.tangem.core.featuretoggle.manager
+
+import android.annotation.SuppressLint
+import com.google.common.truth.Truth
+import com.squareup.moshi.JsonAdapter
+import com.tangem.core.featuretoggle.storage.FeatureToggle
+import com.tangem.core.featuretoggle.storage.FeatureTogglesStorage
+import com.tangem.core.featuretoggle.utils.associateToggles
+import com.tangem.core.featuretoggle.version.VersionProvider
+import com.tangem.datasource.local.AppPreferenceStorage
+import io.mockk.Runs
+import io.mockk.coEvery
+import io.mockk.coVerifyOrder
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.verifyAll
+import io.mockk.verifyOrder
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+
+/**
+[REDACTED_AUTHOR]
+ */
+@OptIn(ExperimentalCoroutinesApi::class)
+@SuppressLint("CheckResult")
+internal class DevFeatureTogglesManagerTest {
+
+    private val localFeatureTogglesStorage = mockk<FeatureTogglesStorage>()
+    private val appPreferenceStorage = mockk<AppPreferenceStorage>(relaxed = true)
+    private val jsonAdapter = mockk<JsonAdapter<Map<String, Boolean>>>()
+    private val versionProvider = mockk<VersionProvider>()
+    private val manager = DevFeatureTogglesManager(
+        localFeatureTogglesStorage = localFeatureTogglesStorage,
+        appPreferenceStorage = appPreferenceStorage,
+        jsonAdapter = jsonAdapter,
+        versionProvider = versionProvider,
+    )
+
+    @Test
+    fun `successfully initialize storage if shared prefs kept feature toggles`() = runTest {
+        val currentVersion = "1.0.0"
+
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        coEvery { appPreferenceStorage.featureToggles } returns savedFeatureToggles
+        coEvery { jsonAdapter.fromJson(savedFeatureToggles) } returns savedFeatureTogglesMap
+        coEvery { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        coEvery { versionProvider.get() } returns currentVersion
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            jsonAdapter.fromJson(savedFeatureToggles)
+            versionProvider.get()
+        }
+
+        val expected = localFeatureToggles
+            .associateToggles(currentVersion)
+            .mapValues { resultToggle ->
+                savedFeatureTogglesMap[resultToggle.key] ?: resultToggle.value
+            }
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `successfully initialize storage if shared prefs kept empty list`() = runTest {
+        val currentVersion = "1.0.0"
+        val sharedPrefFeatureToggles = "[]"
+
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        coEvery { appPreferenceStorage.featureToggles } returns sharedPrefFeatureToggles
+        coEvery { jsonAdapter.fromJson(sharedPrefFeatureToggles) } returns savedFeatureTogglesMap
+        coEvery { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        coEvery { versionProvider.get() } returns currentVersion
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            jsonAdapter.fromJson(sharedPrefFeatureToggles)
+            versionProvider.get()
+        }
+
+        val expected = localFeatureToggles
+            .associateToggles(currentVersion)
+            .mapValues { resultToggle ->
+                savedFeatureTogglesMap[resultToggle.key] ?: resultToggle.value
+            }
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `successfully initialize storage if shared prefs didn't keep feature toggles`() = runTest {
+        val currentVersion = "1.0.0"
+
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        coEvery { appPreferenceStorage.featureToggles } returns ""
+        coEvery { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        coEvery { versionProvider.get() } returns currentVersion
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            versionProvider.get()
+        }
+        verifyAll(inverse = true) { jsonAdapter.fromJson(any<String>()) }
+
+        val expected = localFeatureToggles
+            .associateToggles(currentVersion)
+            .mapValues(Map.Entry<String, Boolean>::value)
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `successfully initialize storage if versionProvider returns null`() = runTest {
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        coEvery { appPreferenceStorage.featureToggles } returns savedFeatureToggles
+        coEvery { jsonAdapter.fromJson(savedFeatureToggles) } returns savedFeatureTogglesMap
+        coEvery { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        coEvery { versionProvider.get() } returns null
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            jsonAdapter.fromJson(savedFeatureToggles)
+            versionProvider.get()
+        }
+
+        val expected = localFeatureToggles
+            .associateToggles(currentVersion = "")
+            .mapValues { resultToggle ->
+                savedFeatureTogglesMap[resultToggle.key] ?: resultToggle.value
+            }
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `get feature availability if feature toggle exists`() {
+        val featureToggles = mutableMapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to true,
+        )
+        manager.setFeatureToggles(featureToggles)
+
+        val actual = manager.isFeatureEnabled(name = "INACTIVE_TEST_FEATURE_ENABLED")
+
+        Truth.assertThat(actual).isTrue()
+    }
+
+    @Test
+    fun `get feature availability if feature toggle doesn't exists`() {
+        val featureToggles = mutableMapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to true,
+        )
+        manager.setFeatureToggles(featureToggles)
+
+        val actual = manager.isFeatureEnabled(name = "")
+
+        Truth.assertThat(actual).isFalse()
+    }
+
+    @Test
+    fun getFeatureToggles() {
+        val expected = mutableMapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to false,
+        )
+
+        manager.setFeatureToggles(expected)
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `change toggle that contains in map`() {
+        val changeableToggleName = "INACTIVE_TEST_FEATURE_ENABLED"
+        val resultMap = mutableMapOf(
+            changeableToggleName to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to false,
+        )
+
+        manager.setFeatureToggles(resultMap)
+        coEvery { jsonAdapter.toJson(resultMap) } returns ""
+
+        manager.changeToggle(changeableToggleName, true)
+
+        resultMap[changeableToggleName] = true
+        verifyOrder { jsonAdapter.toJson(resultMap) }
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(resultMap)
+    }
+
+    @Test
+    fun `change toggle that doesn't contains in map`() {
+        val resultMap = mutableMapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to false,
+        )
+
+        manager.setFeatureToggles(resultMap)
+
+        manager.changeToggle("FEATURE_TOGGLE", true)
+
+        verifyAll(inverse = true) { jsonAdapter.toJson(any()) }
+
+        Truth.assertThat(manager.getFeatureToggles()).containsExactlyEntriesIn(resultMap)
+    }
+
+    private companion object {
+
+        val savedFeatureToggles = """
+            [
+                {
+                    "name": "INACTIVE_TEST_FEATURE_ENABLED",
+                    "version": "undefined"
+                },
+                {
+                    "name": "ACTIVE2_TEST_FEATURE_ENABLED",
+                    "version": "1.0.0"
+                }
+            ]
+        """.trimIndent()
+
+        val savedFeatureTogglesMap = mapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to false,
+        )
+
+        val localFeatureToggles = listOf(
+            FeatureToggle(name = "INACTIVE_TEST_FEATURE_ENABLED", version = "undefined"),
+            FeatureToggle(name = "ACTIVE2_TEST_FEATURE_ENABLED", version = "1.0.0"),
+        )
+    }
+}

core/featuretoggles/src/test/kotlin/com/tangem/core/featuretoggle/manager/ProdFeatureTogglesManagerTest.kt

@@ -0,0 +1,142 @@
+package com.tangem.core.featuretoggle.manager
+
+import android.content.pm.PackageManager
+import com.google.common.truth.Truth
+import com.tangem.core.featuretoggle.storage.FeatureToggle
+import com.tangem.core.featuretoggle.storage.FeatureTogglesStorage
+import com.tangem.core.featuretoggle.utils.associateToggles
+import com.tangem.core.featuretoggle.version.VersionProvider
+import io.mockk.Runs
+import io.mockk.coEvery
+import io.mockk.coVerifyOrder
+import io.mockk.every
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.verifyAll
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+
+/**
+[REDACTED_AUTHOR]
+ */
+@OptIn(ExperimentalCoroutinesApi::class)
+internal class ProdFeatureTogglesManagerTest {
+
+    private val localFeatureTogglesStorage = mockk<FeatureTogglesStorage>()
+    private val versionProvider = mockk<VersionProvider>()
+    private val manager = ProdFeatureTogglesManager(localFeatureTogglesStorage, versionProvider)
+
+    @Test
+    fun `successfully initialize storage`() = runTest {
+        val currentVersion = "1.0.0"
+
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        every { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        every { versionProvider.get() } returns currentVersion
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            versionProvider.get()
+        }
+
+        val expected = localFeatureToggles.associateToggles(currentVersion)
+        Truth.assertThat(manager.getProdFeatureToggles()).containsExactlyEntriesIn(expected)
+    }
+
+    @Test
+    fun `successfully initialize storage if versionProvider returns null`() = runTest {
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        every { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        every { versionProvider.get() } returns null
+
+        manager.init()
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            versionProvider.get()
+        }
+
+        Truth.assertThat(manager.getProdFeatureToggles()).containsExactlyEntriesIn(disabledFeatureToggles)
+    }
+
+    @Test
+    fun `failure initialize storage if localFeatureTogglesStorage throws exception`() = runTest {
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        every { localFeatureTogglesStorage.featureToggles } throws IllegalStateException(
+            "Property featureToggles should be initialized before get.",
+        )
+
+        runCatching { manager.init() }
+            .onSuccess { throw IllegalStateException("localFeatureToggles shouldn't be initialized") }
+            .onFailure {
+                Truth
+                    .assertThat(it)
+                    .hasMessageThat()
+                    .contains("Property featureToggles should be initialized before get.")
+
+                Truth.assertThat(it).isInstanceOf(IllegalStateException::class.java)
+            }
+
+        coVerifyOrder { localFeatureTogglesStorage.init() }
+        verifyAll(inverse = true) { versionProvider.get() }
+    }
+
+    @Test
+    fun `failure initialize storage if versionProvider throws exception`() = runTest {
+        coEvery { localFeatureTogglesStorage.init() } just Runs
+        every { localFeatureTogglesStorage.featureToggles } returns localFeatureToggles
+        every { versionProvider.get() } throws PackageManager.NameNotFoundException()
+
+        runCatching { manager.init() }
+            .onSuccess { throw IllegalStateException("versionProvider should throws exception") }
+            .onFailure {
+                Truth.assertThat(it).isInstanceOf(PackageManager.NameNotFoundException::class.java)
+            }
+
+        coVerifyOrder {
+            localFeatureTogglesStorage.init()
+            versionProvider.get()
+        }
+    }
+
+    @Test
+    fun `get feature availability if feature toggle exists`() {
+        val featureToggles = mapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to true,
+        )
+        manager.setProdFeatureToggles(featureToggles)
+
+        val actual = manager.isFeatureEnabled(name = "INACTIVE_TEST_FEATURE_ENABLED")
+
+        Truth.assertThat(actual).isTrue()
+    }
+
+    @Test
+    fun `get feature availability if feature toggle doesn't exists`() {
+        val featureToggles = mapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to true,
+        )
+        manager.setProdFeatureToggles(featureToggles)
+
+        val actual = manager.isFeatureEnabled(name = "")
+
+        Truth.assertThat(actual).isFalse()
+    }
+
+    private companion object {
+        val localFeatureToggles = listOf(
+            FeatureToggle(name = "INACTIVE_TEST_FEATURE_ENABLED", version = "undefined"),
+            FeatureToggle(name = "ACTIVE2_TEST_FEATURE_ENABLED", version = "1.0.0"),
+        )
+
+        val disabledFeatureToggles = mapOf(
+            "INACTIVE_TEST_FEATURE_ENABLED" to false,
+            "ACTIVE2_TEST_FEATURE_ENABLED" to false,
+        )
+    }
+}

core/featuretoggles/src/test/kotlin/com/tangem/core/featuretoggle/storage/LocalFeatureTogglesStorageTest.kt

@@ -0,0 +1,107 @@
+package com.tangem.core.featuretoggle.storage
+
+import android.annotation.SuppressLint
+import com.google.common.truth.Truth
+import com.squareup.moshi.JsonAdapter
+import com.tangem.datasource.asset.AssetReader
+import io.mockk.coEvery
+import io.mockk.mockk
+import io.mockk.verifyAll
+import io.mockk.verifyOrder
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import java.io.IOException
+
+/**
+[REDACTED_AUTHOR]
+ */
+@OptIn(ExperimentalCoroutinesApi::class)
+@SuppressLint("CheckResult")
+internal class LocalFeatureTogglesStorageTest {
+
+    private val assetReader = mockk<AssetReader>()
+    private val jsonAdapter = mockk<JsonAdapter<List<FeatureToggle>>>()
+    private val storage = LocalFeatureTogglesStorage(assetReader, jsonAdapter)
+
+    @Test
+    fun `successfully initialize storage`() = runTest {
+        coEvery { assetReader.readJson(storage.getConfigPath()) } returns json
+        coEvery { jsonAdapter.fromJson(json) } returns featureToggles
+
+        storage.init()
+
+        verifyOrder {
+            assetReader.readJson(storage.getConfigPath())
+            jsonAdapter.fromJson(json)
+        }
+
+        Truth.assertThat(storage.getFeatureToggles()).containsExactlyElementsIn(featureToggles)
+    }
+
+    @Test
+    fun `failure initialize storage if assetReader throws exception`() = runTest {
+        coEvery { assetReader.readJson(storage.getConfigPath()) } returns json
+        coEvery { jsonAdapter.fromJson(json) } throws IOException()
+
+        storage.init()
+
+        verifyOrder {
+            assetReader.readJson(storage.getConfigPath())
+            jsonAdapter.fromJson(json)
+        }
+
+        runCatching { storage.getFeatureToggles() }
+            .onSuccess { throw IllegalStateException("featureToggles shouldn't be initialized") }
+            .onFailure {
+                Truth
+                    .assertThat(it)
+                    .hasMessageThat()
+                    .contains("Property featureToggles should be initialized before get.")
+
+                Truth.assertThat(it).isInstanceOf(IllegalStateException::class.java)
+            }
+    }
+
+    @Test
+    fun `failure initialize storage if jsonAdapter throws exception`() = runTest {
+        coEvery { assetReader.readJson(storage.getConfigPath()) } throws IOException()
+
+        storage.init()
+
+        verifyOrder { assetReader.readJson(storage.getConfigPath()) }
+        verifyAll(inverse = true) { jsonAdapter.fromJson(any<String>()) }
+
+        runCatching { storage.getFeatureToggles() }
+            .onSuccess { throw IllegalStateException("featureToggles shouldn't be initialized") }
+            .onFailure {
+                Truth
+                    .assertThat(it)
+                    .hasMessageThat()
+                    .contains("Property featureToggles should be initialized before get.")
+
+                Truth.assertThat(it).isInstanceOf(IllegalStateException::class.java)
+            }
+    }
+
+    private companion object {
+
+        val json = """
+            [
+                {
+                    "name": "INACTIVE_TEST_FEATURE_ENABLED",
+                    "version": "undefined"
+                },
+                {
+                    "name": "ACTIVE2_TEST_FEATURE_ENABLED",
+                    "version": "1.0.0"
+                }
+            ]
+        """.trimIndent()
+
+        val featureToggles = listOf(
+            FeatureToggle(name = "INACTIVE_TEST_FEATURE_ENABLED", version = "undefined"),
+            FeatureToggle(name = "ACTIVE2_TEST_FEATURE_ENABLED", version = "1.0.0"),
+        )
+    }
+}

gradle/dependencies.toml

@@ -82,8 +82,9 @@ detekt = "1.21.0"
 # region Testing
 espresso = "3.4.0"
 junit = "4.13.2"
-truth = "1.1.3"
 junitAndroidExt = "1.1.3"
+mockk = "1.13.4"
+truth = "1.1.3"
 # endregion Testing
 
 [plugins]
@@ -153,10 +154,12 @@ detekt-formatting = { module = "io.gitlab.arturbosch.detekt:detekt-formatting",
 # ndregion Detekt
 
 # region Test
+test-coroutine = { module = "org.jetbrains.kotlinx:kotlinx-coroutines-test", version.ref = "coroutine" }
 test-espresso = { module = "androidx.test.espresso:espresso-core", version.ref = "espresso" }
 test-junit = { module = "junit:junit", version.ref = "junit" }
 test-junit-android = { module = "androidx.test.ext:junit", version.ref = "junitAndroidExt" }
 test-truth = { module = "com.google.truth:truth", version.ref = "truth" }
+test-mockk = { module = "io.mockk:mockk", version.ref = "mockk" }
 # endregion Test
 
 # region Other