Add test

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalAddressBookTest.kt

@@ -12,20 +12,24 @@ import android.content.Context
 import android.provider.ContactsContract
 import androidx.test.platform.app.InstrumentationRegistry
 import androidx.test.rule.GrantPermissionRule
+import at.bitfire.davdroid.db.Collection
 import at.bitfire.vcard4android.Contact
 import at.bitfire.vcard4android.GroupMethod
 import at.bitfire.vcard4android.LabeledProperty
 import dagger.hilt.android.qualifiers.ApplicationContext
 import dagger.hilt.android.testing.HiltAndroidRule
 import dagger.hilt.android.testing.HiltAndroidTest
 import ezvcard.property.Telephone
+import io.mockk.every
+import io.mockk.mockk
 import java.util.LinkedList
 import javax.inject.Inject
 import org.junit.After
 import org.junit.AfterClass
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
 import org.junit.Assert.assertNotNull
+import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.BeforeClass
 import org.junit.ClassRule
@@ -123,6 +127,21 @@ class LocalAddressBookTest {
         assertEquals("Test Group", group.displayName)
     }
 
+    /**
+     * Tests the calculation of read only state is correct
+     */
+    @Test
+    fun test_shouldBeReadOnly() {
+        val collectionReadOnly = mockk<Collection> { every { readOnly() } returns true }
+        assertTrue(LocalAddressBook.shouldBeReadOnly(collectionReadOnly, null))
+        assertTrue(LocalAddressBook.shouldBeReadOnly(collectionReadOnly, false))
+        assertTrue(LocalAddressBook.shouldBeReadOnly(collectionReadOnly, true))
+
+        val collectionNotReadOnly = mockk<Collection> { every { readOnly() } returns false }
+        assertFalse(LocalAddressBook.shouldBeReadOnly(collectionNotReadOnly, null))
+        assertFalse(LocalAddressBook.shouldBeReadOnly(collectionNotReadOnly, false))
+        assertTrue(LocalAddressBook.shouldBeReadOnly(collectionNotReadOnly, true))
+    }
 
 
     companion object {