Add `isInDebug` variable to simulate debug/release configs for tests (#2566)

* `isInDebug` as `ThreadLocal<Boolean>`

* Use a simple var for `isInDebug` and add a helper method to test release mode, when running the debug test.

* Add some more docs

---------

Co-authored-by: Benoit Marty <benoit@matrix.org>

libraries/androidutils/build.gradle.kts

@@ -20,6 +20,10 @@ plugins {
 
 android {
     namespace = "io.element.android.libraries.androidutils"
+
+    buildFeatures {
+        buildConfig = true
+    }
 }
 
 anvil {

libraries/androidutils/src/main/kotlin/io/element/android/libraries/androidutils/metadata/IsInDebug.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2024 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.libraries.androidutils.metadata
+
+import io.element.android.libraries.androidutils.BuildConfig
+
+/**
+ * true if the app is built in debug mode.
+ * For testing purpose, this can be changed with [withReleaseBehavior].
+ */
+var isInDebug: Boolean = BuildConfig.DEBUG
+    private set
+
+/**
+ * Run the lambda simulating the app is in release mode.
+ *
+ * **IMPORTANT**: this should **ONLY** be used for testing purposes.
+ */
+fun withReleaseBehavior(lambda: () -> Unit) {
+    isInDebug = false
+    lambda()
+    isInDebug = BuildConfig.DEBUG
+}

libraries/matrix/api/build.gradle.kts

@@ -37,6 +37,7 @@ dependencies {
     implementation(projects.appconfig)
     implementation(projects.libraries.di)
     implementation(libs.dagger)
+    implementation(projects.libraries.androidutils)
     implementation(projects.libraries.core)
     implementation(libs.serialization.json)
     api(projects.libraries.sessionStorage.api)

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/EventId.kt

@@ -16,13 +16,13 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import java.io.Serializable
 
 @JvmInline
 value class EventId(val value: String) : Serializable {
     init {
-        if (BuildConfig.DEBUG && !MatrixPatterns.isEventId(value)) {
+        if (isInDebug && !MatrixPatterns.isEventId(value)) {
             error("`$value` is not a valid event id.\nExample event id: `\$Rqnc-F-dvnEYJTyHq_iKxU2bZ1CI92-kuZq3a5lr5Zg`.")
         }
     }

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/MatrixPatterns.kt

@@ -16,7 +16,7 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import timber.log.Timber
 
 /**
@@ -217,7 +217,7 @@ object MatrixPatterns {
      * - "@bob:domain.org:3455".getDomain() will return "domain.org:3455"
      */
     fun String.getServerName(): String {
-        if (BuildConfig.DEBUG && !isUserId(this)) {
+        if (isInDebug && !isUserId(this)) {
             // They are some invalid userId localpart in the wild, but the domain part should be there anyway
             Timber.w("Not a valid user ID: $this")
         }

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/RoomId.kt

@@ -16,13 +16,13 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import java.io.Serializable
 
 @JvmInline
 value class RoomId(val value: String) : Serializable {
     init {
-        if (BuildConfig.DEBUG && !MatrixPatterns.isRoomId(value)) {
+        if (isInDebug && !MatrixPatterns.isRoomId(value)) {
             error("`$value` is not a valid room id.\n Example room id: `!room_id:domain`.")
         }
     }

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/SpaceId.kt

@@ -16,13 +16,13 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import java.io.Serializable
 
 @JvmInline
 value class SpaceId(val value: String) : Serializable {
     init {
-        if (BuildConfig.DEBUG && !MatrixPatterns.isSpaceId(value)) {
+        if (isInDebug && !MatrixPatterns.isSpaceId(value)) {
             error(
                 "`$value` is not a valid space id.\n" +
                     "Space ids are the same as room ids.\n" +

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/ThreadId.kt

@@ -16,13 +16,13 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import java.io.Serializable
 
 @JvmInline
 value class ThreadId(val value: String) : Serializable {
     init {
-        if (BuildConfig.DEBUG && !MatrixPatterns.isThreadId(value)) {
+        if (isInDebug && !MatrixPatterns.isThreadId(value)) {
             error(
                 "`$value` is not a valid thread id.\n" +
                     "Thread ids are the same as event ids.\n" +

libraries/matrix/api/src/main/kotlin/io/element/android/libraries/matrix/api/core/UserId.kt

@@ -16,7 +16,7 @@
 
 package io.element.android.libraries.matrix.api.core
 
-import io.element.android.libraries.matrix.api.BuildConfig
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import java.io.Serializable
 
 /**
@@ -27,7 +27,7 @@ import java.io.Serializable
 @JvmInline
 value class UserId(val value: String) : Serializable {
     init {
-        if (BuildConfig.DEBUG && !MatrixPatterns.isUserId(value)) {
+        if (isInDebug && !MatrixPatterns.isUserId(value)) {
             error("`$value` is not a valid user id.\nExample user id: `@name:domain`.")
         }
     }

libraries/matrix/api/src/test/kotlin/io/element/android/libraries/matrix/api/permalink/PermalinkBuilderTest.kt

@@ -17,10 +17,10 @@
 package io.element.android.libraries.matrix.api.permalink
 
 import com.google.common.truth.Truth.assertThat
+import io.element.android.libraries.androidutils.metadata.withReleaseBehavior
 import io.element.android.libraries.matrix.api.core.RoomId
 import io.element.android.libraries.matrix.api.core.UserId
 import io.element.android.tests.testutils.assertThrowsInDebug
-import io.element.android.tests.testutils.isInDebug
 import org.junit.Test
 
 class PermalinkBuilderTest {
@@ -40,7 +40,7 @@ class PermalinkBuilderTest {
 
     @Test
     fun `building a permalink for an invalid user id returns failure when not verifying the id`() {
-        if (!isInDebug()) {
+        withReleaseBehavior {
             val userId = UserId("some invalid user id")
             assertThat(PermalinkBuilder.permalinkForUser(userId).isFailure).isTrue()
         }
@@ -48,7 +48,7 @@ class PermalinkBuilderTest {
 
     @Test
     fun `building a permalink for an invalid room id returns failure when not verifying the id`() {
-        if (!isInDebug()) {
+        withReleaseBehavior {
             val roomId = RoomId("some invalid room id")
             assertThat(PermalinkBuilder.permalinkForRoomId(roomId).isFailure).isTrue()
         }

tests/testutils/build.gradle.kts

@@ -30,6 +30,7 @@ dependencies {
     implementation(libs.test.junit)
     implementation(libs.test.truth)
     implementation(libs.coroutines.test)
+    implementation(projects.libraries.androidutils)
     implementation(projects.libraries.architecture)
     implementation(projects.libraries.core)
     implementation(projects.libraries.uiStrings)

tests/testutils/src/main/kotlin/io/element/android/tests/testutils/AssertThrowInDebug.kt

@@ -16,13 +16,14 @@
 
 package io.element.android.tests.testutils
 
+import io.element.android.libraries.androidutils.metadata.isInDebug
 import org.junit.Assert.assertThrows
 
 /**
  * Assert that the lambda throws only on debug mode.
  */
 fun assertThrowsInDebug(lambda: () -> Any?) {
-    if (BuildConfig.DEBUG) {
+    if (isInDebug) {
         assertThrows(IllegalStateException::class.java) {
             lambda()
         }

tests/testutils/src/main/kotlin/io/element/android/tests/testutils/IsInDebug.kt

@@ -1,22 +0,0 @@
-/*
- * Copyright (c) 2023 New Vector Ltd
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package io.element.android.tests.testutils
-
-/**
- * Returns true if the app is in debug mode.
- */
-fun isInDebug() = BuildConfig.DEBUG