Adds tests for CachedValueProvider

equalsverifier-core/src/test/java/nl/jqno/equalsverifier/internal/reflection/instantiation/CachedValueProviderTest.java

@@ -0,0 +1,52 @@
+package nl.jqno.equalsverifier.internal.reflection.instantiation;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Optional;
+import nl.jqno.equalsverifier.internal.reflection.Tuple;
+import nl.jqno.equalsverifier.internal.reflection.TypeTag;
+import nl.jqno.equalsverifier.internal.reflection.instantiation.ValueProvider.Attributes;
+import org.junit.jupiter.api.Test;
+
+public class CachedValueProviderTest {
+
+    private static final TypeTag INT = new TypeTag(int.class);
+
+    private CachedValueProvider sut = new CachedValueProvider();
+
+    @Test
+    public void aRegisteredValueCanBeFound() {
+        sut.put(INT, null, Tuple.of(3, 2, 3));
+        assertEquals(Tuple.of(3, 2, 3), sut.provide(INT, Attributes.unlabeled()).get());
+    }
+
+    @Test
+    public void aValueRegisteredWithALabelCanBeFoundUnderThatLabel() {
+        sut.put(INT, "label", Tuple.of(3, 2, 3));
+        assertEquals(Tuple.of(3, 2, 3), sut.provide(INT, Attributes.labeled("label")).get());
+    }
+
+    @Test
+    public void aValueRegisteredWithALabelCanNotBeFoundWithoutThatLabel() {
+        sut.put(INT, "label", Tuple.of(3, 2, 3));
+        assertEquals(Optional.empty(), sut.provide(INT, Attributes.unlabeled()));
+    }
+
+    @Test
+    public void aQueryWithLabelFallsBackToRegisteredValueWithoutLabel() {
+        sut.put(INT, null, Tuple.of(3, 2, 3));
+        assertEquals(Tuple.of(3, 2, 3), sut.provide(INT, Attributes.labeled("label")).get());
+    }
+
+    @Test
+    public void aQueryWithLabelPrefersRegisteredValueWithThatLabel() {
+        sut.put(INT, null, Tuple.of(3, 2, 3));
+        sut.put(INT, "label", Tuple.of(4, 3, 4));
+        assertEquals(Tuple.of(4, 3, 4), sut.provide(INT, Attributes.labeled("label")).get());
+    }
+
+    @Test
+    public void anUnregisteredValueCanNotBeFound() {
+        assertEquals(Optional.empty(), sut.provide(INT, Attributes.unlabeled()));
+    }
+}