Add integration tests for widget endpoints

src/test/kotlin/web/WidgetResourceTest.kt

@@ -0,0 +1,130 @@
+package web
+
+import common.ServerTest
+import io.restassured.RestAssured.*
+import io.restassured.http.ContentType
+import model.NewWidget
+import model.Widget
+import org.assertj.core.api.Assertions.assertThat
+import org.junit.jupiter.api.Nested
+import org.junit.jupiter.api.Test
+
+class WidgetResourceTest: ServerTest() {
+
+    @Test
+    fun testCreateWidget() {
+        // when
+        val newWidget = NewWidget(null, "widget1", 12)
+        val created = addWidget(newWidget)
+
+        val retrieved = get("/widget/{id}", created.id)
+                .then()
+                .extract().to<Widget>()
+
+        // then
+        assertThat(created.name).isEqualTo(newWidget.name)
+        assertThat(created.quantity).isEqualTo(newWidget.quantity)
+
+        assertThat(created).isEqualTo(retrieved)
+    }
+
+    @Test
+    fun testGetWidgets() {
+        // when
+        val widget1 = NewWidget(null, "widget1", 10)
+        val widget2 = NewWidget(null, "widget2", 5)
+        addWidget(widget1)
+        addWidget(widget2)
+
+        val widgets = get("/widget")
+                .then()
+                .statusCode(200)
+                .extract().to<List<Widget>>()
+
+        assertThat(widgets).hasSize(2)
+        assertThat(widgets).extracting("name").containsExactlyInAnyOrder(widget1.name, widget2.name)
+        assertThat(widgets).extracting("quantity").containsExactlyInAnyOrder(widget1.quantity, widget2.quantity)
+    }
+
+    @Test
+    fun testUpdateWidget() {
+        // when
+        val widget1 = NewWidget(null, "widget1", 10)
+        val saved = addWidget(widget1)
+
+        // then
+        val update = NewWidget(saved.id, "updated", 46)
+        val updated = given()
+                .contentType(ContentType.JSON)
+                .body(update)
+                .When()
+                .put("/widget")
+                .then()
+                .statusCode(200)
+                .extract().to<Widget>()
+
+        assertThat(updated).isNotNull
+        assertThat(updated.id).isEqualTo(update.id)
+        assertThat(updated.name).isEqualTo(update.name)
+        assertThat(updated.quantity).isEqualTo(update.quantity)
+    }
+
+    @Test
+    fun testDeleteWidget() {
+        // when
+        val newWidget = NewWidget(null, "widget1", 12)
+        val created = addWidget(newWidget)
+
+        // then
+        delete("/widget/{id}", created.id)
+                .then()
+                .statusCode(200)
+
+        get("/widget/{id}", created.id)
+                .then()
+                .statusCode(404)
+    }
+
+    @Nested
+    inner class ErrorCases {
+
+        @Test
+        fun testUpdateInvalidWidget() {
+            val updatedWidget = NewWidget(-1, "invalid", -1)
+            given()
+                    .contentType(ContentType.JSON)
+                    .body(updatedWidget)
+                    .When()
+                    .put("/widget")
+                    .then()
+                    .statusCode(404)
+        }
+
+        @Test
+        fun testDeleteInvalidWidget() {
+            delete("/widget/{id}", "-1")
+                    .then()
+                    .statusCode(404)
+        }
+
+        @Test
+        fun testGetInvalidWidget() {
+            get("/widget/{id}", "-1")
+                    .then()
+                    .statusCode(404)
+        }
+
+    }
+
+    private fun addWidget(widget: NewWidget): Widget {
+        return given()
+                .contentType(ContentType.JSON)
+                .body(widget)
+                .When()
+                .post("/widget")
+                .then()
+                .statusCode(201)
+                .extract().to()
+    }
+
+}