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package org.openjdk.jmc.flightrecorder.writer;

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.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.ArgumentMatchers;
import org.mockito.Mockito;

class ConstantPoolTest {
	private ConstantPool instance;

	@BeforeEach
	void setUp() {
		TypeImpl type = Mockito.mock(TypeImpl.class);
		Mockito.when(type.canAccept(ArgumentMatchers.any())).thenReturn(true);

		TypedValueImpl nullValue = new TypedValueImpl(type, null, 0);

		Mockito.when(type.nullValue()).thenReturn(nullValue);

		instance = new ConstantPool(type);
	}

	@Test
	void addOrGetNull() {
		TypedValueImpl value = instance.addOrGet(null);
		assertNotNull(value);
		assertTrue(value.isNull());
	}

	@Test
	void addOrGetNonNull() {
		Object objectValue = "hello";
		TypedValueImpl value = instance.addOrGet(objectValue);
		assertNotNull(value);
		assertFalse(value.isNull());
		assertEquals(objectValue, value.getValue());
	}

	@Test
	void getNegativeIndex() {
		assertNull(instance.get(-1));
	}

	@Test
	void getNonExistent() {
		assertNull(instance.get(100));
	}

	@Test
	void get() {
		Object objectValue = "hello";
		TypedValueImpl value = instance.addOrGet(objectValue);

		assertEquals(value, instance.get(value.getConstantPoolIndex()));
	}
}
