test: context provider example

src/test/java/io/getunleash/DefaultUnleashTest.java

@@ -22,11 +22,15 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.util.*;
+import java.util.function.Supplier;
+
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.RegisterExtension;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
+import org.mockito.invocation.InvocationOnMock;
+import org.mockito.stubbing.Answer;
 import org.slf4j.LoggerFactory;
 
 class DefaultUnleashTest {
@@ -140,6 +144,41 @@ public void should_evaluate_segment_collection_with_one_missing_segment_as_false
  assertThat(sut.isEnabled(toggleName)).isFalse();
  }
 
+ class VersionFetcher {
+ public String getVersion() {
+ return "1.3.7";
+ }
+ }
+ @Test
+ public void should_merge_context_with_context_provider_data() {
+
+ String toggleName = "context-provided-property";
+ String requiredMinimumVersion = "1.2.2";
+ Constraint semverConstraint = new Constraint("version", Operator.SEMVER_GT, requiredMinimumVersion);
+ Constraint userConstraint = new Constraint("userId", Operator.IN, asList("123", "456"));
+ VersionFetcher versionFetcher = spy(new VersionFetcher());
+ ActivationStrategy activationStrategy =
+ new ActivationStrategy(
+ "default",
+ Collections.emptyMap(),
+ asList(semverConstraint, userConstraint),
+ Collections.emptyList(),
+ Collections.emptyList());
+ when(featureRepository.getToggle(toggleName))
+ .thenReturn(new FeatureToggle(toggleName, true, Collections.singletonList(activationStrategy)));
+ when(contextProvider.getContext())
+ .thenAnswer((Answer<UnleashContext>) invocationOnMock ->
+ UnleashContext.builder()
+ .userId("123")
+ .addProperty("version", versionFetcher.getVersion())
+ .build()
+ );
+
+ verify(versionFetcher, times(0)).getVersion();
+ assertThat(sut.isEnabled(toggleName)).isTrue();
+ verify(versionFetcher, times(1)).getVersion();
+ }
+
  @Test
  public void should_allow_fallback_strategy() {
  Strategy fallback = mock(Strategy.class);