Add test that creates database on Android

mailbox-android/build.gradle

@@ -78,8 +78,11 @@ dependencies {
 
     testImplementation 'junit:junit:4.13.2'
 
+    androidTestImplementation "org.jetbrains.kotlin:kotlin-test:$kotlin_version"
     androidTestImplementation 'androidx.test.ext:junit:1.1.3'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
+    androidTestImplementation 'androidx.test:runner:1.1.0'
+    androidTestImplementation 'androidx.test:rules:1.1.0'
 }
 
 def torBinariesDir = 'src/main/res/raw'

mailbox-android/src/androidTest/java/org/briarproject/mailbox/core/DatabaseCreationTest.kt

+package org.briarproject.mailbox.core
+
+import kotlinx.coroutines.runBlocking
+import org.junit.Test
+import org.sqlite.mc.SQLiteMCConfig
+import java.nio.file.Files
+import java.nio.file.Path
+import java.sql.Connection
+import java.sql.DriverManager
+import kotlin.test.assertEquals
+import kotlin.test.assertTrue
+
+class DatabaseCreationTest {
+
+    @Test
+    fun createDatabase(): Unit = runBlocking {
+        val file: Path = Files.createTempFile("test", ".sqlite")
+        println(file)
+        val connection: Connection = DriverManager.getConnection("jdbc:sqlite:$file",
+            SQLiteMCConfig().withKey("very-secret").toProperties())
+
+        val stmt = connection.createStatement()
+        stmt.executeUpdate("CREATE TABLE students (id integer, name string)")
+        stmt.executeUpdate("INSERT INTO students values (1, 'alice')")
+        stmt.executeUpdate("INSERT INTO students values (2, 'bob')")
+
+        val prep = connection.prepareStatement("SELECT * FROM students")
+        val results = prep.executeQuery()
+        for (i in 0..1) {
+            val available = results.next()
+            assertTrue(available)
+
+            val id = results.getInt(1)
+            val name = results.getString(2)
+            when (i) {
+                0 -> {
+                    assertEquals(1, id)
+                    assertEquals("alice", name)
+                }
+                1 -> {
+                    assertEquals(2, id)
+                    assertEquals("bob", name)
+                }
+            }
+        }
+
+        Files.delete(file)
+    }
+
+}
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