Add date formatter tests

.github/workflows/testing.yml

@@ -0,0 +1,43 @@
+# SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+# SPDX-License-Identifier: MIT
+
+name: Android Tests
+
+on:
+  pull_request:
+  push:
+    branches: [ main, stable-* ]
+
+permissions:
+  contents: read
+
+jobs:
+  validation:
+    name: Validate Gradle Wrapper
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+          check-latest: true
+          cache: 'gradle'
+      - name: Validate Gradle Wrapper
+        uses: gradle/actions/wrapper-validation@ed408507eac070d1f99cc633dbcf757c94c7933a # v4.4.3
+
+  test:
+    name: Unit tests
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+      - uses: actions/setup-java@dded0888837ed1f317902acf8a20df0ad188d165 # v5.0.0
+        with:
+          distribution: 'temurin'
+          java-version: '17'
+          check-latest: true
+          cache: 'gradle'
+      - name: Unit tests
+        run: bash ./gradlew test --stacktrace --no-configuration-cache

build.gradle

@@ -9,6 +9,12 @@ buildscript {
     ext {
         daggerVersion = "2.57.1"
         kotlinVersion = "2.2.20"
+        jUnitVersion = "4.13.2"
+        androidXTestVersion = "1.3.0"
+        androidXEspressoTestVersion = "3.7.0"
+        mockkVersion = "1.14.5"
+        mockitoVersion = "5.20.0"
+        mockitoKotlinVersion = "6.0.0"
     }
 }
 

core/build.gradle

@@ -21,6 +21,12 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    testOptions {
+        unitTests {
+            includeAndroidResources = true
+        }
+    }
+
     compileOptions {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
@@ -41,9 +47,15 @@ dependencies {
     implementation 'androidx.core:core-ktx:1.16.0'
     implementation 'androidx.appcompat:appcompat:1.7.1'
     implementation 'com.google.android.material:material:1.13.0'
-    testImplementation 'junit:junit:4.13.2'
-    androidTestImplementation 'androidx.test.ext:junit:1.3.0'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.7.0'
+
+    testImplementation "junit:junit:$jUnitVersion"
+    testImplementation 'androidx.test:core:1.7.0'
+    testImplementation 'org.robolectric:robolectric:4.16'
+    testImplementation "org.mockito:mockito-core:$mockitoVersion"
+    testImplementation "org.mockito.kotlin:mockito-kotlin:$mockitoKotlinVersion"
+    testImplementation "io.mockk:mockk:$mockkVersion"
+    androidTestImplementation "androidx.test.ext:junit:$androidXTestVersion"
+    androidTestImplementation "androidx.test.espresso:espresso-core:$androidXEspressoTestVersion"
 }
 
 afterEvaluate {

core/src/main/java/com/nextcloud/android/common/core/utils/DateFormatter.kt

@@ -1,9 +1,10 @@
-/**
+/*
  * Nextcloud Android Common Library
  *
  * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: MIT
  */
+
 package com.nextcloud.android.common.core.utils
 
 import android.content.Context

core/src/test/java/com/nextcloud/android/common/core/utils/DateFormatterTest.kt

@@ -0,0 +1,98 @@
+/*
+ * Nextcloud Android Common Library
+ *
+ * SPDX-FileCopyrightText: 2025 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: MIT
+ */
+
+package com.nextcloud.android.common.core.utils
+
+import android.content.Context
+import android.os.Build
+import androidx.test.core.app.ApplicationProvider
+import com.nextcloud.android.common.core.R
+import org.junit.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+import java.text.SimpleDateFormat
+import java.util.Calendar
+import java.util.Locale
+
+/**
+ * DateFormatter tests checking the different formats relative/absolute date formatting.
+ */
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [Build.VERSION_CODES.Q])
+class DateFormatterTest {
+    private lateinit var dateFormatter: DateFormatter
+    private lateinit var context: Context
+
+    @Before
+    fun setUp() {
+        context = ApplicationProvider.getApplicationContext()
+        // Force a specific locale to make tests independent of the test environment's locale
+        val config = context.resources.configuration
+        config.setLocale(Locale.US)
+        val localizedContext = context.createConfigurationContext(config)
+        dateFormatter = DateFormatter(localizedContext)
+    }
+
+    @Test
+    fun `Test 'now' formatting`() {
+        val calendar = Calendar.getInstance()
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        val expected = context.getString(R.string.date_formatting_now)
+        assertEquals(expected, formattedDate)
+    }
+
+    @Test
+    fun `Test relative minutes formatting`() {
+        val calendar = Calendar.getInstance()
+        calendar.add(Calendar.MINUTE, -5)
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        val expected = context.getString(R.string.date_formatting_relative_minutes, 5)
+        assertEquals(expected, formattedDate)
+    }
+
+    @Test
+    fun `Test relative hours formatting`() {
+        val calendar = Calendar.getInstance()
+        calendar.add(Calendar.HOUR, -3)
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        val expected = context.resources.getQuantityString(R.plurals.date_formatting_relative_hours, 3, 3)
+        assertEquals(expected, formattedDate)
+    }
+
+    @Test
+    fun `Test day of the week formatting`() {
+        val calendar = Calendar.getInstance()
+        calendar.add(Calendar.DAY_OF_YEAR, -4)
+        val sdf = SimpleDateFormat("EEE", Locale.US)
+        val expected = sdf.format(calendar.time)
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        assertEquals(expected, formattedDate)
+    }
+
+    @Test
+    fun `Test month and day formatting`() {
+        val calendar = Calendar.getInstance()
+        calendar.add(Calendar.DAY_OF_YEAR, -100)
+        val sdf = SimpleDateFormat("MMM d", Locale.US)
+        val expected = sdf.format(calendar.time)
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        assertEquals(expected, formattedDate)
+    }
+
+    @Test
+    fun `Test full date formatting`() {
+        val calendar = Calendar.getInstance()
+        calendar.add(Calendar.YEAR, -2)
+        val sdf = SimpleDateFormat("MMM d, yyyy", Locale.US)
+        val expected = sdf.format(calendar.time)
+        val formattedDate = dateFormatter.getConditionallyRelativeFormattedTimeSpan(calendar)
+        assertEquals(expected, formattedDate)
+    }
+}