Move tests and create a command to run all tests

src/test/kotlin/steps/KtorServerContext.kt

@@ -0,0 +1,51 @@
+package steps
+
+import io.ktor.application.*
+import io.ktor.server.testing.*
+import java.util.concurrent.TimeUnit
+import kotlin.test.fail
+
+class KtorServerContext(useByDefault: Boolean = true, val module: Application.() -> Unit) {
+
+    init { if (useByDefault) setDefault() }
+
+    companion object {
+        lateinit var defaultServer: KtorServerContext
+    }
+
+    private val engine = TestApplicationEngine(createTestEnvironment())
+
+    private data class RequestSetup(val setup: TestApplicationRequest.() -> Unit, val keepSetup: Boolean = true)
+    private val preRequestSetup = mutableListOf<RequestSetup>()
+
+    var call: TestApplicationCall? = null
+
+    fun addPreRequestSetup(keepSetup: Boolean = true, hook: TestApplicationRequest.() -> Unit) {
+        preRequestSetup.add(RequestSetup(hook, keepSetup))
+    }
+
+    fun handleRequest(setup: TestApplicationRequest.() -> Unit) =
+        try {
+            call = engine.handleRequest {
+                preRequestSetup.forEach { it.setup(this) }
+                setup(this)
+            }
+        } catch (e: Throwable) {
+            fail("Request fail, $e")
+        } finally {
+            preRequestSetup.removeAll { !it.keepSetup }
+        }
+
+    fun setDefault() {
+        defaultServer = this
+    }
+
+    fun start() {
+        engine.start()
+        module(engine.application)
+    }
+
+    fun stop() {
+        engine.stop(0L, 0L, TimeUnit.MILLISECONDS)
+    }
+}