Add tests for offline example (#2465)

Author: christiangoerdes

distribution/examples/offline/apis.yaml

@@ -22,7 +22,7 @@ api:
 ---
 # Deploy an API from OpenAPI
 # API docs: http://localhost:2000/api-docs
-# Try: curl http://localhost:2000/shop
+# Try: curl http://localhost:2000/shop/v2/
 api:
   port: 2000
   specs:

distribution/src/test/java/com/predic8/membrane/examples/withoutinternet/OfflineExampleTest.java

@@ -0,0 +1,66 @@
+package com.predic8.membrane.examples.withoutinternet;
+
+import com.predic8.membrane.examples.util.AbstractSampleMembraneStartStopTestcase;
+import org.junit.jupiter.api.Test;
+
+import static io.restassured.RestAssured.when;
+import static org.hamcrest.Matchers.*;
+
+public class OfflineExampleTest extends AbstractSampleMembraneStartStopTestcase {
+
+    @Override
+    protected String getExampleDirName() {
+        return "/offline";
+    }
+
+    @Test
+    public void toBackend() {
+        // @formatter:off
+        when()
+            .get("http://localhost:2000/foo")
+        .then()
+            .statusCode(200)
+            .body("success", equalTo(true));
+        // @formatter:on
+    }
+
+    @Test
+    public void apiDocs() {
+        // @formatter:off
+        when()
+            .get("http://localhost:2000/api-docs")
+        .then()
+            .statusCode(200)
+            .body("fruit-shop-api-v2-2-0.size()", equalTo(5))
+            .body("fruit-shop-api-v2-2-0.openapi", equalTo("3.0.3"))
+            .body("fruit-shop-api-v2-2-0.title", equalTo("Fruit Shop API"))
+            .body("fruit-shop-api-v2-2-0.version", equalTo("2.2.0"))
+            .body("fruit-shop-api-v2-2-0.openapi_link", equalTo("/api-docs/fruit-shop-api-v2-2-0"))
+            .body("fruit-shop-api-v2-2-0.ui_link", equalTo("/api-docs/ui/fruit-shop-api-v2-2-0"));
+        // @formatter:on
+    }
+
+    @Test
+    public void shopV2_fruits() {
+        // @formatter:off
+        when()
+            .get("http://localhost:2000/shop/v2")
+        .then()
+            .statusCode(200)
+            .body("fruits", contains("apple", "cherry", "pear"))
+            .body("fruits.size()", equalTo(3));
+        // @formatter:on
+    }
+
+    @Test
+    public void admin() {
+        // @formatter:off
+        when()
+            .get("http://localhost:9000")
+        .then()
+            .statusCode(200)
+            .body(containsString("/admin"));
+        // @formatter:on
+    }
+
+}