Cover todo app with tests

dependencies/pom.xml

@@ -1158,6 +1158,11 @@
                 <artifactId>logback-classic</artifactId>
                 <version>${version.lib.logback}</version>
             </dependency>
+            <dependency>
+                <groupId>ch.qos.logback</groupId>
+                <artifactId>logback-core</artifactId>
+                <version>${version.lib.logback}</version>
+            </dependency>
             <dependency>
                 <groupId>org.apache.activemq</groupId>
                 <artifactId>activemq-client</artifactId>

examples/todo-app/backend/pom.xml

@@ -38,6 +38,10 @@
     <properties>
         <mainClass>io.helidon.demo.todos.backend.Main</mainClass>
         <version.lib.cassandra>3.10.2</version.lib.cassandra>
+        <version.cassandra.unit>4.3.1.0</version.cassandra.unit>
+        <version.datastax.driver.core>4.9.0</version.datastax.driver.core>
+        <version.datastax.driver.query.builder>4.9.0</version.datastax.driver.query.builder>
+        <version.codahale.metrics.core>3.0.2</version.codahale.metrics.core>
     </properties>
 
     <dependencyManagement>
@@ -85,6 +89,45 @@
             <groupId>com.datastax.cassandra</groupId>
             <artifactId>cassandra-driver-core</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.microprofile.tests</groupId>
+            <artifactId>helidon-microprofile-tests-junit5</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.config</groupId>
+            <artifactId>helidon-config-mp</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.cassandraunit</groupId>
+            <artifactId>cassandra-unit</artifactId>
+            <version>${version.cassandra.unit}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.datastax.oss</groupId>
+            <artifactId>java-driver-core</artifactId>
+            <version>${version.datastax.driver.core}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.datastax.oss</groupId>
+            <artifactId>java-driver-query-builder</artifactId>
+            <version>${version.datastax.driver.query.builder}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.codahale.metrics</groupId>
+            <artifactId>metrics-core</artifactId>
+            <version>${version.codahale.metrics.core}</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>

examples/todo-app/backend/src/test/java/io/helidon/demo/todos/backend/BackendTests.java

@@ -0,0 +1,157 @@
+/*
+ * Copyright (c) 2021 Oracle and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.helidon.demo.todos.backend;
+
+import java.io.IOException;
+import java.util.Base64;
+import java.util.Properties;
+
+import javax.inject.Inject;
+import javax.json.Json;
+import javax.json.JsonArray;
+import javax.json.JsonObject;
+import javax.ws.rs.client.Entity;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.MediaType;
+
+import io.helidon.common.http.Http;
+import io.helidon.config.mp.MpConfigSources;
+import io.helidon.config.yaml.mp.YamlMpConfigSource;
+import io.helidon.microprofile.tests.junit5.Configuration;
+import io.helidon.microprofile.tests.junit5.HelidonTest;
+
+import com.datastax.driver.core.Cluster;
+import com.datastax.driver.core.Session;
+import org.cassandraunit.utils.EmbeddedCassandraServerHelper;
+import org.eclipse.microprofile.config.spi.ConfigProviderResolver;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+@HelidonTest
+@Configuration(useExisting = true)
+class BackendTests {
+
+    private final static String CASSANDRA_HOST = "127.0.0.1";
+
+    @Inject
+    private WebTarget webTarget;
+
+    @BeforeAll
+    static void init() throws IOException {
+        Properties cassandraProperties = initCassandra();
+
+        ClassLoader cl = Thread.currentThread().getContextClassLoader();
+        ConfigProviderResolver configResolver = ConfigProviderResolver.instance();
+
+        org.eclipse.microprofile.config.Config mpConfig = configResolver.getBuilder()
+                .withSources(YamlMpConfigSource.create(cl.getResource("test-application.yaml")),
+                             MpConfigSources.create(cassandraProperties))
+                .build();
+
+        configResolver.registerConfig(mpConfig, null);
+    }
+
+    @AfterAll
+    static void stopServer() {
+        EmbeddedCassandraServerHelper.cleanEmbeddedCassandra();
+    }
+
+    private static Properties initCassandra() throws IOException {
+        EmbeddedCassandraServerHelper.startEmbeddedCassandra(EmbeddedCassandraServerHelper.CASSANDRA_RNDPORT_YML_FILE,
+                                                             20000L);
+        Properties prop = new Properties();
+        prop.put("cassandra.port", String.valueOf(EmbeddedCassandraServerHelper.getNativeTransportPort()));
+        prop.put("cassandra.servers.host.host", CASSANDRA_HOST);
+
+        Cluster cluster = Cluster.builder()
+                .withoutMetrics()
+                .addContactPoint(CASSANDRA_HOST)
+                .withPort(EmbeddedCassandraServerHelper.getNativeTransportPort())
+                .build();
+
+        Session session = cluster.connect();
+        session.execute("CREATE KEYSPACE backend WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor' : 1};");
+        session.execute(
+                "CREATE TABLE backend.backend (id ascii, user ascii, message ascii, completed Boolean, created timestamp, "
+                        + "PRIMARY KEY (id));");
+        session.execute("select * from backend.backend;");
+
+        session.close();
+        cluster.close();
+
+        return prop;
+    }
+
+    @Test
+    void testTodoScenario() {
+        String basicAuth = "Basic " + Base64.getEncoder().encodeToString("john:password".getBytes());
+        JsonObject todo = Json.createObjectBuilder()
+                .add("title", "todo title")
+                .build();
+
+        // Add a new todo
+        JsonObject returnedTodo = webTarget
+                .path("/api/backend")
+                .request(MediaType.APPLICATION_JSON_TYPE)
+                .header(Http.Header.AUTHORIZATION, basicAuth)
+                .post(Entity.json(todo), JsonObject.class);
+
+        assertEquals("john", returnedTodo.getString("user"));
+        assertEquals(todo.getString("title"), returnedTodo.getString("title"));
+
+        // Get the todo created earlier
+        JsonObject fromServer = webTarget.path("/api/backend/" + returnedTodo.getString("id"))
+                .request(MediaType.APPLICATION_JSON_TYPE)
+                .header(Http.Header.AUTHORIZATION, basicAuth)
+                .get(JsonObject.class);
+
+        assertEquals(returnedTodo, fromServer);
+
+        // Update the todo created earlier
+        JsonObject updatedTodo = Json.createObjectBuilder()
+                .add("title", "updated title")
+                .add("completed", false)
+                .build();
+
+        fromServer = webTarget.path("/api/backend/" + returnedTodo.getString("id"))
+                .request(MediaType.APPLICATION_JSON_TYPE)
+                .header(Http.Header.AUTHORIZATION, basicAuth)
+                .put(Entity.json(updatedTodo), JsonObject.class);
+
+        assertEquals(updatedTodo.getString("title"), fromServer.getString("title"));
+
+        // Delete the todo created earlier
+        fromServer = webTarget.path("/api/backend/" + returnedTodo.getString("id"))
+                .request(MediaType.APPLICATION_JSON_TYPE)
+                .header(Http.Header.AUTHORIZATION, basicAuth)
+                .delete(JsonObject.class);
+
+        assertEquals(returnedTodo.getString("id"), fromServer.getString("id"));
+
+        // Get list of todos
+        JsonArray jsonValues = webTarget.path("/api/backend")
+                .request(MediaType.APPLICATION_JSON_TYPE)
+                .header(Http.Header.AUTHORIZATION, basicAuth)
+                .get(JsonArray.class);
+
+        assertEquals(0, jsonValues.size(), "There should be no todos on server");
+    }
+
+}

examples/todo-app/backend/src/test/resources/test-application.yaml

@@ -0,0 +1,40 @@
+#
+# Copyright (c) 2021 Oracle and/or its affiliates.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# increase importance
+config_ordinal: 500
+
+# we use custom config and Helidon JUnit integration, must allow initializer
+mp:
+  initializer:
+    allow: true
+    no-warn: true
+
+server:
+  port: 0
+  host: localhost
+
+tracing:
+  service: "todo:back"
+  enabled: false
+
+security:
+  providers:
+    - http-basic-auth:
+        realm: "helidon"
+        users:
+          - login: "john"
+            password: "password"

examples/todo-app/frontend/pom.xml

@@ -121,6 +121,21 @@
             <groupId>org.glassfish.jersey.core</groupId>
             <artifactId>jersey-common</artifactId>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.webserver</groupId>
+            <artifactId>helidon-webserver-jersey</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>io.helidon.webclient</groupId>
+            <artifactId>helidon-webclient</artifactId>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>