Polish "Create a settings.gradle file for Gradle projects"

Closes gh-643

initializr-generator/src/main/resources/templates/starter-settings.gradle

@@ -1 +1 @@
-rootProject.name = '{{artifactId}}'
+rootProject.name = '{{artifactId}}'

initializr-generator/src/test/java/io/spring/initializr/generator/ProjectGeneratorTests.java

@@ -70,6 +70,18 @@ public class ProjectGeneratorTests extends AbstractProjectGeneratorTests {
 		verifyProjectSuccessfulEventFor(request);
 	}
 
+	@Test
+	public void defaultProjectWithGradle() {
+		ProjectRequest request = createProjectRequest("web");
+		request.setType("gradle-build");
+		ProjectAssert gradleProject = generateProject(request).isGradleProject();
+		gradleProject.gradleBuildAssert()
+				.contains("compile('org.springframework.boot:spring-boot-starter-web')")
+				.contains("testCompile('org.springframework.boot:spring-boot-starter-test')");
+		gradleProject.gradleSettingsAssert().hasProjectName("demo");
+		verifyProjectSuccessfulEventFor(request);
+	}
+
 	@Test
 	public void noDependencyAddsRootStarter() {
 		ProjectRequest request = createProjectRequest();
@@ -230,6 +242,16 @@ public class ProjectGeneratorTests extends AbstractProjectGeneratorTests {
 				.contains("package org.acme.foo145;");
 	}
 
+	@Test
+	public void gradleProjectWithCustomArtifactId() {
+		ProjectRequest request = createProjectRequest();
+		request.setType("gradle-build");
+		request.setArtifactId("my-application");
+		generateProject(request).isGradleProject().gradleSettingsAssert()
+				.hasProjectName("my-application");
+		verifyProjectSuccessfulEventFor(request);
+	}
+
 	@Test
 	public void springBoot11UseEnableAutoConfigurationJava() {
 		ProjectRequest request = createProjectRequest("web");

initializr-generator/src/test/java/io/spring/initializr/test/generator/GradleSettingsAssert.java

@@ -0,0 +1,43 @@
+/*
+ * Copyright 2012-2018 the original author or authors.
+ *
+ * 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.spring.initializr.test.generator;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Very simple assertions for the gradle settings.
+ *
+ * @author Stephane Nicoll
+ */
+public class GradleSettingsAssert {
+
+	private final String content;
+
+	public GradleSettingsAssert(String content) {
+		this.content = content;
+	}
+
+	public GradleSettingsAssert hasProjectName(String name) {
+		return contains(String.format("rootProject.name = '%s'", name));
+	}
+
+	public GradleSettingsAssert contains(String expression) {
+		assertThat(this.content).contains(expression);
+		return this;
+	}
+
+}

initializr-generator/src/test/java/io/spring/initializr/test/generator/ProjectAssert.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2017 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -104,6 +104,19 @@ public class ProjectAssert {
 		}
 	}
 
+	/**
+	 * Return a {@link GradleSettingsAssert} for this project.
+	 */
+	public GradleSettingsAssert gradleSettingsAssert() {
+		try {
+			return new GradleSettingsAssert(StreamUtils.copyToString(
+					new FileInputStream(file("settings.gradle")), Charset.forName("UTF-8")));
+		}
+		catch (IOException e) {
+			throw new IllegalArgumentException("Cannot resolve settings.gradle", e);
+		}
+	}
+
 	/**
 	 * Return a {@link SourceCodeAssert} for the specified source code.
 	 */