Mockito.only() points to the wanted call as unwanted if it is the first being called.

[PiotrPrzybylak]

Mockito.only() Javadoc claims that it is equivalent to:

verify(mock).someMethod();
verifyNoMoreInteractions(mock)

 * <pre class="code"><code class="java">
 *   verify(mock, only()).someMethod();
 *   //above is a shorthand for following 2 lines of code:
 *   verify(mock).someMethod();
 *   verifyNoMoreInteractions(mock);
 * </code></pre>

It is really not. The most important issue is that Mockito.only() points to the wanted call as unwanted if it is the first being called. Example:

package codepractice.tddexample;

import org.junit.jupiter.api.Test;

import static org.mockito.Mockito.*;

public class MockitoOnlyExampleTest {

    @Test
    public void shouldDeleteProduct() {
        ProductDeleter productDeleter = mock(ProductDeleter.class);

        productDeleter.execute(3);
        productDeleter.execute(2);

        verify(productDeleter, only()).execute(3);
//        verify(productDeleter).execute(3);
//        verifyNoMoreInteractions(productDeleter);
    }
}

The result is:

org.mockito.exceptions.verification.NoInteractionsWanted: 
No interactions wanted here:
-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:16)
But found this interaction on mock 'productDeleter':
-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:13)
***
For your reference, here is the list of all invocations ([?] - means unverified).
1. [?]-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:13)
2. [?]-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:14)


	at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:16)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)

And should be :

• "But found this interaction on mock 'productDeleter'":" -points to line 14 instead of 13
• Wanted interaction marked as verified

org.mockito.exceptions.verification.NoInteractionsWanted: 
No interactions wanted here:
-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:16)
But found this interaction on mock 'productDeleter':
-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:14)
***
For your reference, here is the list of all invocations ([?] - means unverified).
1. -> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:13)
2. [?]-> at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:14)


	at codepractice.tddexample.MockitoOnlyExampleTest.shouldDeleteProduct(MockitoOnlyExampleTest.java:16)
	at java.base/java.lang.reflect.Method.invoke(Method.java:580)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1596)

I will make PR soon. I made this issue to have an issue number for commit message.

Versions:
Mockito: 5.11.0
jdk: OpenJdk-21
os: Windows 10

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