asmhatreandClaude Sonnet 5.5
715036b640
One test per question, each writing and asserting its own transcript under output/. Covers lifecycle, extensions, parameterized and dynamic tests, mocks vs spies, verification, strict stubs, static and constructor mocking, and flaky tests. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01CifR2BE7PBvRy5hT8TS9oz
75 lines
3.2 KiB
Java
75 lines
3.2 KiB
Java
package lab.jm;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertFalse;
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import static org.junit.jupiter.api.Assertions.assertTrue;
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import static org.mockito.Mockito.mock;
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import static org.mockito.Mockito.mockConstruction;
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import static org.mockito.Mockito.mockStatic;
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import static org.mockito.Mockito.when;
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import java.io.InputStream;
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import java.util.concurrent.atomic.AtomicReference;
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import org.junit.jupiter.api.Test;
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import org.mockito.MockedConstruction;
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import org.mockito.MockedStatic;
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/** Q24 to Q26: final classes, static mocking, constructor mocking. */
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class E_MockitoAdvancedTest extends Lab {
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@Test
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void q24_finalClassesAndMockMaker() throws Exception {
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q(24, "final-classes-mock-maker");
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FinalPricer pricer = mock(FinalPricer.class);
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when(pricer.price(3)).thenReturn(999);
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p("FinalPricer is final: %s", java.lang.reflect.Modifier.isFinal(FinalPricer.class.getModifiers()));
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p("mock(FinalPricer.class).price(3) = %d (real code would give 30)", pricer.price(3));
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p("mock.getClass() == FinalPricer.class : %s", pricer.getClass() == FinalPricer.class);
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var maker = org.mockito.internal.configuration.plugins.Plugins.getMockMaker();
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p("default MockMaker : %s", maker.getClass().getName());
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int major;
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try (InputStream in = org.mockito.Mockito.class.getResourceAsStream("Mockito.class")) {
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byte[] head = in.readNBytes(8);
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major = ((head[6] & 0xff) << 8) | (head[7] & 0xff);
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}
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p("class-file major version of org.mockito.Mockito : %d (Java %d)", major, major - 44);
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assertEquals(999, pricer.price(3));
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assertTrue(pricer.getClass() == FinalPricer.class);
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assertTrue(maker.getClass().getSimpleName().contains("Inline"));
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assertEquals(55, major);
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}
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@Test
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void q25_mockStatic() throws Exception {
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q(25, "mock-static");
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p("before : %s", Ids.newOrderId());
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AtomicReference<String> otherThread = new AtomicReference<>();
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try (MockedStatic<Ids> ids = mockStatic(Ids.class)) {
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ids.when(Ids::newOrderId).thenReturn("MOCK-ID");
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p("inside the scope : %s", Ids.newOrderId());
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Thread t = new Thread(() -> otherThread.set(Ids.newOrderId()));
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t.start();
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t.join();
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p("other thread sees : %s", otherThread.get());
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ids.verify(Ids::newOrderId, org.mockito.Mockito.times(1));
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}
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p("after the scope : %s", Ids.newOrderId());
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assertEquals("REAL-ID", otherThread.get());
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assertEquals("REAL-ID", Ids.newOrderId());
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}
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@Test
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void q26_mockConstruction() {
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q(26, "mock-construction");
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p("before : %s", Receipt.print("tea"));
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try (MockedConstruction<Receipt> mc = mockConstruction(Receipt.class,
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(mock, ctx) -> when(mock.render()).thenReturn("FAKE " + ctx.arguments()))) {
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p("inside : %s", Receipt.print("tea"));
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p("constructed during the scope: %d", mc.constructed().size());
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assertEquals(1, mc.constructed().size());
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}
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p("after : %s", Receipt.print("tea"));
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assertFalse(Receipt.print("tea").startsWith("FAKE"));
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}
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}
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