Run update steps only if they have not been run before

scm-webapp/src/test/java/sonia/scm/update/UpdateEngineTest.java

@@ -0,0 +1,97 @@
+package sonia.scm.update;
+
+import org.junit.jupiter.api.Test;
+import sonia.scm.migration.UpdateStep;
+import sonia.scm.store.ConfigurationEntryStoreFactory;
+import sonia.scm.store.InMemoryConfigurationEntryStore;
+import sonia.scm.store.InMemoryConfigurationEntryStoreFactory;
+import sonia.scm.version.Version;
+
+import java.util.ArrayList;
+import java.util.LinkedHashSet;
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static sonia.scm.version.Version.parse;
+
+class UpdateEngineTest {
+
+  ConfigurationEntryStoreFactory storeFactory = new InMemoryConfigurationEntryStoreFactory(new InMemoryConfigurationEntryStore());
+
+  List<String> processedUpdates = new ArrayList<>();
+
+  @Test
+  void shouldProcessStepsInCorrectOrder() {
+    LinkedHashSet<UpdateStep> updateSteps = new LinkedHashSet<>();
+
+    updateSteps.add(new FixedVersionUpdateStep("test", "1.1.1"));
+    updateSteps.add(new FixedVersionUpdateStep("test", "1.2.0"));
+    updateSteps.add(new FixedVersionUpdateStep("test", "1.1.0"));
+
+    UpdateEngine updateEngine = new UpdateEngine(updateSteps, storeFactory);
+    updateEngine.update();
+
+    assertThat(processedUpdates)
+      .containsExactly("1.1.0", "1.1.1", "1.2.0");
+  }
+
+  @Test
+  void shouldRunStepsOnlyOnce() {
+    LinkedHashSet<UpdateStep> updateSteps = new LinkedHashSet<>();
+
+    updateSteps.add(new FixedVersionUpdateStep("test", "1.1.1"));
+
+    UpdateEngine updateEngine = new UpdateEngine(updateSteps, storeFactory);
+    updateEngine.update();
+
+    processedUpdates.clear();
+
+    updateEngine.update();
+
+    assertThat(processedUpdates).isEmpty();
+  }
+
+  @Test
+  void shouldRunStepsForDifferentTypesIndependently() {
+    LinkedHashSet<UpdateStep> updateSteps = new LinkedHashSet<>();
+
+    updateSteps.add(new FixedVersionUpdateStep("test", "1.1.1"));
+
+    UpdateEngine updateEngine = new UpdateEngine(updateSteps, storeFactory);
+    updateEngine.update();
+
+    processedUpdates.clear();
+
+    updateSteps.add(new FixedVersionUpdateStep("other", "1.1.1"));
+
+    updateEngine = new UpdateEngine(updateSteps, storeFactory);
+    updateEngine.update();
+
+    assertThat(processedUpdates).containsExactly("1.1.1");
+  }
+
+  class FixedVersionUpdateStep implements UpdateStep {
+    private final String type;
+    private final String version;
+
+    FixedVersionUpdateStep(String type, String version) {
+      this.type = type;
+      this.version = version;
+    }
+
+    @Override
+    public Version getTargetVersion() {
+      return parse(version);
+    }
+
+    @Override
+    public String affectedDataType() {
+      return type;
+    }
+
+    @Override
+    public void doUpdate() {
+      processedUpdates.add(version);
+    }
+  }
+}