Fix build-blockers + add wrapper/icon/tests/CI (blocked on FFmpegKit dep)

.github/workflows/ci.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+jobs:
+  build:
+    name: build / unit tests / lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: "17"
+
+      - name: Set up Gradle
+        uses: gradle/actions/setup-gradle@v4
+
+      - name: Build, test, and lint
+        run: ./gradlew --no-daemon assembleDebug testDebugUnitTest lintDebug

app/build.gradle.kts

@@ -88,4 +88,6 @@ dependencies {
     implementation(libs.kotlinx.coroutines.android)
 
     debugImplementation(libs.androidx.ui.tooling)
+
+    testImplementation("junit:junit:4.13.2")
 }

app/src/main/res/drawable/ic_launcher_background.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <path
+        android:fillColor="#1B1B2F"
+        android:pathData="M0,0h108v108h-108z" />
+</vector>

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="108dp"
+    android:height="108dp"
+    android:viewportWidth="108"
+    android:viewportHeight="108">
+    <group
+        android:scaleX="2.2"
+        android:scaleY="2.2"
+        android:translateX="27.6"
+        android:translateY="27.6">
+        <path
+            android:fillColor="#FFFFFF"
+            android:pathData="M12,3v10.55c-0.59,-0.34 -1.27,-0.55 -2,-0.55C7.79,13 6,14.79 6,17s1.79,4 4,4s4,-1.79 4,-4V7h4V3H12z" />
+    </group>
+</vector>

app/src/main/res/drawable/ic_music_note.xml

@@ -3,8 +3,7 @@
     android:width="24dp"
     android:height="24dp"
     android:viewportWidth="24"
-    android:viewportHeight="24"
-    android:tint="?attr/colorControlNormal">
+    android:viewportHeight="24">
     <path
         android:fillColor="@android:color/white"
         android:pathData="M12,3v10.55c-0.59,-0.34 -1.27,-0.55 -2,-0.55C7.79,13 6,14.79 6,17s1.79,4 4,4s4,-1.79 4,-4V7h4V3H12z" />

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,5 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+    <background android:drawable="@drawable/ic_launcher_background" />
+    <foreground android:drawable="@drawable/ic_launcher_foreground" />
+</adaptive-icon>

app/src/test/java/com/retune432/app/util/AudioConverterTest.kt

@@ -0,0 +1,66 @@
+package com.retune432.app.util
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+/**
+ * Unit tests for the pure (non-Android) logic in [AudioConverter]:
+ * extension parsing, the supported-format check, and the 432/440 pitch ratio.
+ * The Context/Uri/FFmpeg paths are intentionally not exercised here.
+ */
+class AudioConverterTest {
+
+    @Test
+    fun ratio_shifts_a440_down_to_a432() {
+        assertEquals(432.0 / 440.0, AudioConverter.RATIO, 0.0)
+        // ~31.77 cents down: ratio is just under 1.0
+        assertTrue(AudioConverter.RATIO < 1.0)
+        assertEquals(0.98181, AudioConverter.RATIO, 1e-5)
+    }
+
+    @Test
+    fun getExtension_returns_lowercased_suffix() {
+        assertEquals("mp3", AudioConverter.getExtension("song.mp3"))
+        assertEquals("flac", AudioConverter.getExtension("My Track.FLAC"))
+        assertEquals("m4a", AudioConverter.getExtension("a.b.c.M4A"))
+    }
+
+    @Test
+    fun getExtension_handles_no_dot_and_trailing_dot() {
+        assertEquals("", AudioConverter.getExtension("noextension"))
+        assertEquals("", AudioConverter.getExtension("trailing."))
+        assertEquals("", AudioConverter.getExtension(""))
+    }
+
+    @Test
+    fun getExtension_handles_dotfiles() {
+        // ".flac" has no name before the dot, so substringAfterLast yields "flac"
+        assertEquals("flac", AudioConverter.getExtension(".flac"))
+    }
+
+    @Test
+    fun isSupported_accepts_every_declared_format_case_insensitively() {
+        for (ext in AudioConverter.SUPPORTED_EXTENSIONS) {
+            assertTrue(ext, AudioConverter.isSupported("track.$ext"))
+            assertTrue(ext, AudioConverter.isSupported("TRACK.${ext.uppercase()}"))
+        }
+    }
+
+    @Test
+    fun isSupported_rejects_unknown_and_extensionless() {
+        assertFalse(AudioConverter.isSupported("video.mp4"))
+        assertFalse(AudioConverter.isSupported("doc.txt"))
+        assertFalse(AudioConverter.isSupported("README"))
+        assertFalse(AudioConverter.isSupported(""))
+    }
+
+    @Test
+    fun supported_extensions_are_lowercase_and_nonempty() {
+        assertTrue(AudioConverter.SUPPORTED_EXTENSIONS.isNotEmpty())
+        for (ext in AudioConverter.SUPPORTED_EXTENSIONS) {
+            assertEquals(ext, ext.lowercase())
+        }
+    }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-8.9-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists