test: Add native API tests

src/test/java/com/spotify/confidence/ConfidenceTest.java

@@ -0,0 +1,18 @@
+package com.spotify.confidence;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+import org.junit.jupiter.api.Test;
+
+public class ConfidenceTest {
+  private final FakeEventSenderEngine fakeEngine = new FakeEventSenderEngine(new FakeClock());
+  private final ResolverClientTestUtils.FakeFlagResolverClient fakeFlagResolverClient =
+      new ResolverClientTestUtils.FakeFlagResolverClient();
+
+  @Test
+  void getValue() {
+    final Confidence confidence = Confidence.create(fakeEngine, fakeFlagResolverClient);
+    Integer value = confidence.getValue("flag.prop-E", 20);
+    assertEquals(50, value);
+  }
+}