fix: merge eval context (open-feature#149)

fix merge eval context

Signed-off-by: Robert Grassian <[email protected]>

Signed-off-by: Robert Grassian <[email protected]>

Author: rgrassian-split

src/main/java/dev/openfeature/sdk/OpenFeatureClient.java

@@ -118,7 +118,7 @@ private <T> FlagEvaluationDetails<T> evaluateFlag(FlagValueType type, String key
             apiContext = openfeatureApi.getEvaluationContext() != null
                     ? openfeatureApi.getEvaluationContext()
                     : new MutableContext();
-            clientContext = openfeatureApi.getEvaluationContext() != null
+            clientContext = this.getEvaluationContext() != null
                     ? this.getEvaluationContext()
                     : new MutableContext();
 

src/test/java/dev/openfeature/sdk/OpenFeatureClientTest.java

@@ -29,4 +29,30 @@ void shouldNotThrowExceptionIfHookHasDifferentTypeArgumentThanHookContext() {
         assertThat(actual.getValue()).isTrue();
         assertThat(TEST_LOGGER.getLoggingEvents()).filteredOn(event -> event.getLevel().equals(Level.ERROR)).isEmpty();
     }
+
+    @Test
+    void mergeContextTest() {
+        TEST_LOGGER.clear();
+
+        String flag = "feature key";
+        boolean defaultValue = false;
+        String targetingKey = "targeting key";
+        EvaluationContext ctx = new MutableContext(targetingKey);
+
+        OpenFeatureAPI api = mock(OpenFeatureAPI.class);
+        FeatureProvider mockProvider = mock(FeatureProvider.class);
+        // this makes it so that true is returned only if the targeting key set at the client level is honored
+        when(mockProvider.getBooleanEvaluation(
+          eq(flag), eq(defaultValue), argThat(
+            context -> context.getTargetingKey().equals(targetingKey)))).thenReturn(ProviderEvaluation.<Boolean>builder()
+          .value(true).build());
+        when(api.getProvider()).thenReturn(mockProvider);
+
+        OpenFeatureClient client = new OpenFeatureClient(api, "name", "version");
+        client.setEvaluationContext(ctx);
+
+        FlagEvaluationDetails<Boolean> result = client.getBooleanDetails(flag, defaultValue);
+
+        assertThat(result.getValue()).isTrue();
+    }
 }