Add Konsist test to ensure that tests are named correctly

Author: Rawa

android/test/arch/src/test/kotlin/net/mullvad/mullvadvpn/test/arch/JUnitTest.kt

@@ -2,6 +2,7 @@ package net.mullvad.mullvadvpn.test.arch
 
 import com.lemonappdev.konsist.api.Konsist
 import com.lemonappdev.konsist.api.verify.assertEmpty
+import com.lemonappdev.konsist.api.verify.assertTrue
 import org.junit.jupiter.api.Test
 
 class JUnitTest {
@@ -27,4 +28,38 @@ class JUnitTest {
                 }
             }
             .assertEmpty()
+
+    @Test
+    fun `ensure all non android tests are written with spaces`() =
+        allNonAndroidTests().assertTrue { it.name.contains(' ') }
+
+    @Test
+    fun `ensure all non android tests does start with lower case letter`() =
+        allNonAndroidTests().assertTrue { it.name.first().isLowerCase() }
+
+    @Test
+    fun `ensure all non android tests have 'ensure' or 'should' in function name`() =
+        allNonAndroidTests().assertTrue { it.name.containsEnsureOrShould() }
+
+    private fun String.containsEnsureOrShould(): Boolean {
+        return contains("ensure") || contains("should") || contains("then")
+    }
+
+    private fun allNonAndroidTests() =
+        Konsist.scopeFromTest()
+            .functions()
+            // withAnnotationOf is broken in latest Consist version, so we filter manually
+            // https://github.com/LemonAppDev/konsist/discussions/738
+            .filter { it.annotations.any { it.text == "@Test" } }
+            .filter { it.sourceSetName != "androidTest" }
+            .filter { function ->
+                ignoredTestPackages.none { function.packagee!!.fullyQualifiedName.startsWith(it) }
+            }
+
+    companion object {
+        // The following packages are not following the naming convention since they are android
+        // test that does not support spaces in function names.
+        private val ignoredTestPackages =
+            listOf("net.mullvad.mullvadvpn.test.e2e", "net.mullvad.mullvadvpn.test.mockapi")
+    }
 }