add a test to make sure string format placeholders are the correct sy…

…ntax

app/src/test/kotlin/org/cru/godtools/ui/languages/I18nStringsTest.kt

@@ -0,0 +1,28 @@
+package org.cru.godtools.ui.languages
+
+import android.app.Application
+import android.content.Context
+import androidx.test.core.app.ApplicationProvider
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import kotlin.test.Test
+import org.cru.godtools.R
+import org.junit.runner.RunWith
+import org.robolectric.annotation.Config
+
+@RunWith(AndroidJUnit4::class)
+@Config(application = Application::class)
+class I18nStringsTest {
+    private val context: Context get() = ApplicationProvider.getApplicationContext()
+    private val resources get() = context.resources
+
+    @Test
+    @Config(qualifiers = "ar")
+    fun `Languages - Arabic - Valid format placeholders`() {
+        // plurals
+        repeat(200) {
+            resources.getQuantityString(R.plurals.dashboard_tools_section_filter_available_tools, it, it)
+            resources.getQuantityString(R.plurals.language_settings_downloadable_languages_available_tools, it, it)
+            resources.getQuantityString(R.plurals.language_settings_section_app_language_available, it, it)
+        }
+    }
+}