Add buildSrc including build conventions plugins

Closes gh-1942

buildSrc/src/test/java/io/spring/gradle/convention/TestsConfigurationPluginITest.java

@@ -0,0 +1,31 @@
+package io.spring.gradle.convention;
+
+import io.spring.gradle.TestKit;
+import org.gradle.testkit.runner.BuildResult;
+import org.gradle.testkit.runner.TaskOutcome;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class TestsConfigurationPluginITest {
+
+	private TestKit testKit;
+
+	@BeforeEach
+	void setup(@TempDir Path tempDir) {
+		this.testKit = new TestKit(tempDir.toFile());
+	}
+
+	@Test
+    public void canFindDepencency() throws Exception {
+        BuildResult result = this.testKit.withProjectResource("samples/testsconfiguration")
+				.withArguments("check")
+				.build();
+		assertThat(result.task(":web:check").getOutcome()).isEqualTo(TaskOutcome.SUCCESS);
+	}
+
+}