Add additional test cases

src/test/kotlin/build/buf/gradle/ConfigurationTest.kt

@@ -28,6 +28,16 @@ class ConfigurationTest : AbstractBufIntegrationTest() {
         assertFailure()
     }
 
+    @Test
+    fun `project cannot use buf yaml workspaces and the protobuf gradle plugin first`() {
+        assertFailure()
+    }
+
+    @Test
+    fun `project cannot use buf yaml workspaces and the protobuf gradle plugin second`() {
+        assertFailure()
+    }
+
     @Test
     fun `project can use both buf-yaml and the protobuf-gradle-plugin, protobuf applied first`() {
         gradleRunner().withArguments(":tasks").build()

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_first/buf.work.yaml

@@ -0,0 +1,3 @@
+version: v1
+directories:
+  - workspace

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_first/buf.yaml

@@ -0,0 +1,3 @@
+version: v2
+modules:
+  - path: workspace

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_first/build.gradle

@@ -0,0 +1,9 @@
+plugins {
+  id 'java'
+  id 'build.buf'
+  id 'com.google.protobuf' version "$protobufGradleVersion"
+}
+
+repositories {
+  mavenCentral()
+}

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_second/buf.work.yaml

@@ -0,0 +1,3 @@
+version: v1
+directories:
+  - workspace

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_second/buf.yaml

@@ -0,0 +1,3 @@
+version: v2
+modules:
+  - path: workspace

src/test/resources/ConfigurationTest/project_cannot_use_buf_yaml_workspaces_and_the_protobuf_gradle_plugin_second/build.gradle

@@ -0,0 +1,9 @@
+plugins {
+  id 'java'
+  id 'com.google.protobuf' version "$protobufGradleVersion"
+  id 'build.buf'
+}
+
+repositories {
+  mavenCentral()
+}