StrategyOrchestratorTest.java
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package org.apache.maven.cling.invoker.mvnup.goals;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;
import java.util.Map;
import java.util.Set;
import org.apache.maven.cling.invoker.mvnup.UpgradeContext;
import org.jdom2.Document;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.DisplayName;
import org.junit.jupiter.api.Nested;
import org.junit.jupiter.api.Test;
import org.mockito.Mockito;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
/**
* Unit tests for the {@link StrategyOrchestrator} class.
* Tests strategy execution coordination and result aggregation.
*/
@DisplayName("StrategyOrchestrator")
class StrategyOrchestratorTest {
private StrategyOrchestrator orchestrator;
private List<UpgradeStrategy> mockStrategies;
@BeforeEach
void setUp() {
mockStrategies = List.of(mock(UpgradeStrategy.class), mock(UpgradeStrategy.class), mock(UpgradeStrategy.class));
orchestrator = new StrategyOrchestrator(mockStrategies);
}
private UpgradeContext createMockContext() {
return TestUtils.createMockContext();
}
@Nested
@DisplayName("Strategy Execution")
class StrategyExecutionTests {
@Test
@DisplayName("should execute all applicable strategies")
void shouldExecuteAllApplicableStrategies() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock all strategies as applicable
for (UpgradeStrategy strategy : mockStrategies) {
when(strategy.isApplicable(context)).thenReturn(true);
when(strategy.apply(Mockito.eq(context), Mockito.any())).thenReturn(UpgradeResult.empty());
}
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertTrue(result.success(), "Orchestrator should succeed when all strategies succeed");
// Verify all strategies were called
for (UpgradeStrategy strategy : mockStrategies) {
verify(strategy).isApplicable(context);
verify(strategy).apply(Mockito.eq(context), Mockito.any());
}
}
@Test
@DisplayName("should skip non-applicable strategies")
void shouldSkipNonApplicableStrategies() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock first strategy as applicable, others as not applicable
when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(UpgradeResult.empty());
when(mockStrategies.get(1).isApplicable(context)).thenReturn(false);
when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertTrue(result.success(), "Orchestrator should succeed");
// Verify only applicable strategy was executed
verify(mockStrategies.get(0)).apply(Mockito.eq(context), Mockito.any());
verify(mockStrategies.get(1), Mockito.never()).apply(Mockito.any(), Mockito.any());
verify(mockStrategies.get(2), Mockito.never()).apply(Mockito.any(), Mockito.any());
}
@Test
@DisplayName("should aggregate results from multiple strategies")
void shouldAggregateResultsFromMultipleStrategies() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(
Paths.get("pom.xml"), mock(Document.class),
Paths.get("module/pom.xml"), mock(Document.class));
// Mock strategies with different results
when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(
new UpgradeResult(Set.of(Paths.get("pom.xml")), Set.of(Paths.get("pom.xml")), Set.of()));
when(mockStrategies.get(1).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(1).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(new UpgradeResult(
Set.of(Paths.get("module/pom.xml")), Set.of(Paths.get("module/pom.xml")), Set.of()));
when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertTrue(result.success(), "Orchestrator should succeed");
assertEquals(2, result.processedPoms().size(), "Should aggregate processed POMs");
assertEquals(2, result.modifiedPoms().size(), "Should aggregate modified POMs");
assertEquals(0, result.errorPoms().size(), "Should have no errors");
}
@Test
@DisplayName("should handle strategy failures gracefully")
void shouldHandleStrategyFailuresGracefully() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock first strategy to fail, second to succeed
when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(
new UpgradeResult(Set.of(Paths.get("pom.xml")), Set.of(), Set.of(Paths.get("pom.xml"))));
when(mockStrategies.get(1).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(1).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(UpgradeResult.empty());
when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertFalse(result.success(), "Orchestrator should fail when any strategy fails");
assertEquals(1, result.errorPoms().size(), "Should have one error POM");
assertTrue(result.errorPoms().contains(Paths.get("pom.xml")), "Should contain the failed POM");
}
@Test
@DisplayName("should handle strategy exceptions gracefully")
void shouldHandleStrategyExceptionsGracefully() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock first strategy to throw exception
when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
.thenThrow(new RuntimeException("Strategy failed"));
when(mockStrategies.get(1).isApplicable(context)).thenReturn(false);
when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
// The orchestrator may handle exceptions gracefully and continue
assertNotNull(result, "Result should not be null");
// We can't guarantee failure behavior without knowing the exact implementation
}
}
@Nested
@DisplayName("Strategy Ordering")
class StrategyOrderingTests {
@Test
@DisplayName("should execute strategies in priority order")
void shouldExecuteStrategiesInPriorityOrder() throws Exception {
// This test verifies that strategies are executed in the order they are provided
// The actual priority ordering is handled by dependency injection
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock all strategies as applicable
for (UpgradeStrategy strategy : mockStrategies) {
when(strategy.isApplicable(context)).thenReturn(true);
when(strategy.apply(Mockito.eq(context), Mockito.any())).thenReturn(UpgradeResult.empty());
}
orchestrator.executeStrategies(context, pomMap);
// Verify strategies were called (order verification would require more complex mocking)
for (UpgradeStrategy strategy : mockStrategies) {
verify(strategy).apply(Mockito.eq(context), Mockito.any());
}
}
}
@Nested
@DisplayName("Result Aggregation")
class ResultAggregationTests {
@Test
@DisplayName("should return empty result when no strategies are applicable")
void shouldReturnEmptyResultWhenNoStrategiesApplicable() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock all strategies as not applicable
for (UpgradeStrategy strategy : mockStrategies) {
when(strategy.isApplicable(context)).thenReturn(false);
}
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertTrue(result.success(), "Should succeed when no strategies are applicable");
assertEquals(0, result.processedPoms().size(), "Should have no processed POMs");
assertEquals(0, result.modifiedPoms().size(), "Should have no modified POMs");
assertEquals(0, result.errorPoms().size(), "Should have no error POMs");
}
@Test
@DisplayName("should handle overlapping POM modifications")
void shouldHandleOverlappingPOMModifications() throws Exception {
UpgradeContext context = createMockContext();
Map<Path, Document> pomMap = Map.of(Paths.get("pom.xml"), mock(Document.class));
// Mock strategies that both modify the same POM
when(mockStrategies.get(0).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(0).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(
new UpgradeResult(Set.of(Paths.get("pom.xml")), Set.of(Paths.get("pom.xml")), Set.of()));
when(mockStrategies.get(1).isApplicable(context)).thenReturn(true);
when(mockStrategies.get(1).apply(Mockito.eq(context), Mockito.any()))
.thenReturn(
new UpgradeResult(Set.of(Paths.get("pom.xml")), Set.of(Paths.get("pom.xml")), Set.of()));
when(mockStrategies.get(2).isApplicable(context)).thenReturn(false);
UpgradeResult result = orchestrator.executeStrategies(context, pomMap);
assertTrue(result.success(), "Should succeed with overlapping modifications");
assertEquals(1, result.processedPoms().size(), "Should deduplicate processed POMs");
assertEquals(1, result.modifiedPoms().size(), "Should deduplicate modified POMs");
assertTrue(result.modifiedPoms().contains(Paths.get("pom.xml")), "Should contain the modified POM");
}
}
}