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JMockit is a Java toolkit for automated developer testing.
It contains APIs for the creation of the objects to be tested, for mocking dependencies, and for faking external
APIs; JUnit (4 & 5) and TestNG test runners are supported.
It also contains an advanced code coverage tool.
/*
* Copyright (c) 2006 Rogério Liesenfeld
* This file is subject to the terms of the MIT license (see LICENSE.txt).
*/
package mockit;
import java.lang.reflect.*;
import java.util.*;
import java.util.regex.*;
import javax.annotation.*;
import mockit.internal.expectations.*;
import mockit.internal.expectations.argumentMatching.*;
import mockit.internal.startup.*;
import mockit.internal.util.*;
import org.hamcrest.Matcher;
/**
* Provides common API for use inside {@linkplain Expectations expectation} and {@linkplain Verifications verification}
* blocks.
*/
@SuppressWarnings({"ConstantConditions", "ClassWithTooManyFields"})
abstract class Invocations
{
static { Startup.verifyInitialization(); }
/**
* Matches any {@code Object} reference received by a parameter of a reference type.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* The use of this field will usually require a cast to the specific parameter type.
* However, if there is any other parameter for which an argument matching constraint is specified, passing the
* {@code null} reference instead will have the same effect.
*
* When the parameter to be matched is a varargs parameter of element type {@code V}, the use of
* {@code any} should be cast to {@code V[]}.
*
* In invocations to non-accessible methods or constructors (for example, with
* {@link Deencapsulation#invoke(Object, String, Object...)}), use {@link #withAny} instead.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see Tutorial
*/
protected final Object any = null;
/**
* Matches any {@code String} value received by a parameter of this type.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #any
* @see Tutorial
*/
// This is intentional: the empty string causes the compiler to not generate a field read,
// while the null reference is inconvenient with the invoke(...) methods:
protected final String anyString = new String();
/**
* Matches any {@code long} or {@code Long} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Long anyLong = 0L;
/**
* Matches any {@code int} or {@code Integer} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Integer anyInt = 0;
/**
* Matches any {@code short} or {@code Short} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Short anyShort = 0;
/**
* Matches any {@code byte} or {@code Byte} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Byte anyByte = 0;
/**
* Matches any {@code boolean} or {@code Boolean} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Boolean anyBoolean = false;
/**
* Matches any {@code char} or {@code Character} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyDouble
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Character anyChar = '\0';
/**
* Matches any {@code double} or {@code Double} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyFloat
* @see #anyInt
* @see #anyLong
* @see #anyShort
* @see #anyString
* @see #any
* @see Tutorial
*/
protected final Double anyDouble = 0.0;
/**
* Matches any {@code float} or {@code Float} value received by a parameter of one of these types.
*
* This field can only be used as the argument value at the proper parameter position in a method/constructor
* invocation, when recording or verifying an expectation; it cannot be used anywhere else.
*
* @see #anyBoolean
* @see #anyByte
* @see #anyChar
* @see #anyDouble
* @see #anyInt
* @see #anyLong
* @see #anyString
* @see #anyShort
* @see #any
* @see Tutorial
*/
protected final Float anyFloat = 0.0F;
/**
* A non-negative value assigned to this field will be taken as the exact number of times that invocations matching
* the current expectation should occur during replay.
*
* @see #minTimes
* @see #maxTimes
* @see Tutorial
*/
protected int times;
/**
* A non-negative value assigned to this field will be taken as the minimum number of times that invocations matching
* the current expectation should occur during replay.
* Zero or a negative value implies there is no lower limit.
* The maximum number of times is automatically adjusted to allow any number of invocations.
*
* Both {@code minTimes} and {@code maxTimes} can be specified for the same expectation, as long as {@code minTimes}
* is assigned first.
*
* @see #times
* @see #maxTimes
* @see Tutorial
*/
protected int minTimes;
/**
* A non-negative value assigned to this field will be taken as the maximum number of times that invocations matching
* the current expectation should occur during replay.
* A negative value implies there is no upper limit.
*
* Both {@code minTimes} and {@code maxTimes} can be specified for the same expectation, as long as {@code minTimes}
* is assigned first.
*
* @see #times
* @see #minTimes
* @see Tutorial
*/
protected int maxTimes;
/**
* An string assigned to this field will be used as a prefix for the error message shown for the current expectation
* if it's found to be violated.
*
* Inside an expectation/verification block, the assignment must follow the invocation which records/verifies the
* expectation; if there is no current expectation at the point the assignment appears, an
* {@code IllegalStateException} is thrown.
*
* Notice there are only two different ways in which an expectation can be violated: either an unexpected
* invocation occurs during replay, or a missing invocation is detected.
*/
protected CharSequence $;
@Nonnull abstract TestOnlyPhase getCurrentPhase();
/**
* Calling this method causes the expectation recorded/verified on the given mocked instance to match only those
* invocations that occur on the same instance, at replay time.
*
* By default, such instances can be different between the replay phase and the record or verify phase, even though
* the method or constructor invoked is the same, and the invocation arguments all match.
* The use of this method allows invocations to also be matched on the instance invoked.
*
* Typically, tests that need to match instance invocations on the mocked instances invoked will declare two or more
* mock fields and/or mock parameters of the exact same mocked type.
* These instances will then be passed to the code under test, which will invoke them during the replay phase.
* To avoid the need to explicitly call {@code onInstance(Object)} on each of these different instances of the
* same type, instance matching is implied (and automatically applied to all relevant invocations) whenever
* two or more mocked instances of the same type are in scope for a given test method. This property of the API makes
* the use of {@code onInstance} much less frequent than it might otherwise be.
*
* In most cases, an invocation to the given mocked instance will be made on the value returned by this method (ie,
* a chained invocation).
* However, in the situation where the tested method calls an instance method defined in a mocked super-class
* (possibly an overridden method called through the {@code super} keyword), it will be necessary to match on a
* different instance than the one used for recording invocations.
* To do so, this method should be given the desired instance to match, while the invocation to be recorded should be
* done on the available mocked instance, which must be a different one (otherwise a non-mocked method would get
* executed).
* This is valid only if the instance to be matched is assignable to the mocked type, and typically occurs when
* partially mocking a class hierarchy.
*
* @return the given mocked instance, allowing the invocation being recorded/verified to immediately follow the call
* to this method
*
* @see Tutorial
*/
protected final T onInstance(T mockedInstance)
{
if (mockedInstance == null) {
throw new NullPointerException("Missing mocked instance to match");
}
getCurrentPhase().setNextInstanceToMatch(mockedInstance);
return mockedInstance;
}
// Methods for argument matching ///////////////////////////////////////////////////////////////////////////////////
/**
* Applies a Hamcrest argument matcher for a parameter in the current expectation.
*
* @param argumentMatcher any {@code org.hamcrest.Matcher} object
*
* @return the value recorded inside the given Hamcrest matcher, or {@code null} if there is no such value to be
* found
*
* @see #with(Delegate)
*/
protected final T withArgThat(Matcher argumentMatcher)
{
HamcrestAdapter matcher = new HamcrestAdapter(argumentMatcher);
addMatcher(matcher);
Object argValue = matcher.getInnerValue();
//noinspection unchecked
return (T) argValue;
}
/**
* Applies a custom argument matcher for a parameter in the current expectation.
*
* The class of the given delegate object should define a single non-private delegate method
* (plus any number of helper {@code private} methods).
* The name of the delegate method doesn't matter, but it must have a single parameter capable of receiving the
* relevant argument values.
*
* The return type of the delegate method should be {@code boolean} or {@code void}.
* In the first case, a return value of {@code true} will indicate a successful match for the actual invocation
* argument at replay time, while a return of {@code false} will fail to match the invocation.
* In the case of a {@code void} return type, the actual invocation argument should be validated through a suitable
* JUnit/TestNG assertion.
*
* @param objectWithDelegateMethod an instance of a class defining a single non-private delegate method
*
* @return the default primitive value corresponding to {@code T} if it's a primitive wrapper type, or {@code null}
* otherwise
*
* @see #withArgThat(org.hamcrest.Matcher)
* @see Tutorial
*/
protected final T with(Delegate objectWithDelegateMethod)
{
Class delegateClass = objectWithDelegateMethod.getClass();
Type[] genericInterfaces = delegateClass.getGenericInterfaces();
while (genericInterfaces.length == 0) {
delegateClass = delegateClass.getSuperclass();
genericInterfaces = delegateClass.getGenericInterfaces();
}
if (!(genericInterfaces[0] instanceof ParameterizedType)) {
throw new IllegalArgumentException("Delegate class lacks the parameter type");
}
ParameterizedType type = (ParameterizedType) genericInterfaces[0];
Type parameterType = type.getActualTypeArguments()[0];
addMatcher(new ReflectiveMatcher(objectWithDelegateMethod));
return DefaultValues.computeForWrapperType(parameterType);
}
private void addMatcher(@Nonnull ArgumentMatcher matcher)
{
getCurrentPhase().addArgMatcher(matcher);
}
/**
* Same as {@link #withEqual(Object)}, but matching any argument value of the appropriate type.
*
* Consider using instead the "anyXyz" field appropriate to the parameter type:
* {@link #anyBoolean}, {@link #anyByte}, {@link #anyChar}, {@link #anyDouble}, {@link #anyFloat}, {@link #anyInt},
* {@link #anyLong}, {@link #anyShort}, {@link #anyString}, or {@link #any} for other reference types.
*
* Note: when using {@link Deencapsulation#invoke(Object, String, Object...)}, etc., it's valid to pass
* {@code withAny(ParameterType.class)} if an actual instance of the parameter type cannot be created.
*
* @param arg an arbitrary value which will match any argument value in the replay phase
*
* @return the input argument
*
* @see Tutorial
*/
protected final T withAny(T arg)
{
ArgumentMatcher matcher;
if (arg instanceof String) matcher = AlwaysTrueMatcher.ANY_STRING;
else if (arg instanceof Integer) matcher = AlwaysTrueMatcher.ANY_INT;
else if (arg instanceof Boolean) matcher = AlwaysTrueMatcher.ANY_BOOLEAN;
else if (arg instanceof Character) matcher = AlwaysTrueMatcher.ANY_CHAR;
else if (arg instanceof Double) matcher = AlwaysTrueMatcher.ANY_DOUBLE;
else if (arg instanceof Float) matcher = AlwaysTrueMatcher.ANY_FLOAT;
else if (arg instanceof Long) matcher = AlwaysTrueMatcher.ANY_LONG;
else if (arg instanceof Byte) matcher = AlwaysTrueMatcher.ANY_BYTE;
else if (arg instanceof Short) matcher = AlwaysTrueMatcher.ANY_SHORT;
else matcher = AlwaysTrueMatcher.ANY_VALUE;
addMatcher(matcher);
return arg;
}
/**
* Captures the argument value passed into the associated expectation parameter, for each invocation that matches the
* expectation when the tested code is exercised.
* As each such value is captured, it gets added to the given list so that it can be inspected later.
*
* @param valueHolderForMultipleInvocations list into which the arguments received by matching invocations will be
* added
*
* @return the default value for type {@code T}
*
* @see Verifications#withCapture()
* @see Verifications#withCapture(Object)
* @see Tutorial
*/
protected final T withCapture(List valueHolderForMultipleInvocations)
{
addMatcher(new CaptureMatcher(valueHolderForMultipleInvocations));
return null;
}
/**
* When passed as argument for an expectation, creates a new matcher that will check if the given value is
* {@link Object#equals(Object) equal} to the corresponding argument received by a matching invocation.
*
* The matcher is added to the end of the list of argument matchers for the invocation being recorded/verified.
* It cannot be reused for a different parameter.
*
* Usually, this particular method should not be used. Instead, simply pass the desired argument value
* directly, without any matcher.
* Only when specifying values for a varargs method it's useful, and even then only when some other argument
* matcher is also used.
*
* @param arg the expected argument value
*
* @return the given argument
*
* @see Tutorial
*/
protected final T withEqual(T arg)
{
Map instanceMap = getCurrentPhase().getInstanceMap();
addMatcher(new LenientEqualityMatcher(arg, instanceMap));
return arg;
}
/**
* Same as {@link #withEqual(Object)}, but checking that a numeric invocation argument in the replay phase is
* sufficiently close to the given value.
*
* @param value the center value for range comparison
* @param delta the tolerance around the center value, for a range of [value - delta, value + delta]
*
* @return the given {@code value}
*
* @see Tutorial
*/
protected final double withEqual(double value, double delta)
{
addMatcher(new NumericEqualityMatcher(value, delta));
return value;
}
/**
* Same as {@link #withEqual(Object)}, but checking that a numeric invocation argument in the replay phase is
* sufficiently close to the given value.
*
* @param value the center value for range comparison
* @param delta the tolerance around the center value, for a range of [value - delta, value + delta]
*
* @return the given {@code value}
*
* @see Tutorial
*/
protected final float withEqual(float value, double delta)
{
addMatcher(new NumericEqualityMatcher(value, delta));
return value;
}
/**
* Same as {@link #withEqual(Object)}, but checking that an invocation argument in the replay phase is an instance of
* the same class as the given object.
*
* Equivalent to a withInstanceOf(object.getClass()) call, except that it returns {@code object} instead
* of {@code null}.
*
* @param object an instance of the desired class
*
* @return the given instance
*
* @see Tutorial
*/
protected final T withInstanceLike(T object)
{
addMatcher(ClassMatcher.create(object.getClass()));
return object;
}
/**
* Same as {@link #withEqual(Object)}, but checking that an invocation argument in the replay phase is an instance of
* the given class.
*
* @param argClass the desired class
*
* @return always {@code null}; if you need a specific return value, use {@link #withInstanceLike(Object)}
*
* @see Tutorial
*/
protected final T withInstanceOf(Class argClass)
{
addMatcher(ClassMatcher.create(argClass));
return null;
}
/**
* Same as {@link #withEqual(Object)}, but checking that the invocation argument in the replay phase is different
* from the given value.
*
* @param arg an arbitrary value, but different from the ones expected to occur during replay
*
* @return the given argument value
*
* @see Tutorial
*/
protected final T withNotEqual(T arg)
{
addMatcher(new InequalityMatcher(arg));
return arg;
}
/**
* Same as {@link #withEqual(Object)}, but checking that an invocation argument in the replay phase is {@code null}.
*
* @return always {@code null}
*
* @see Tutorial
*/
protected final T withNull()
{
addMatcher(NullityMatcher.INSTANCE);
return null;
}
/**
* Same as {@link #withEqual(Object)}, but checking that an invocation argument in the replay phase is not
* {@code null}.
*
* @return always {@code null}
*
* @see Tutorial
*/
protected final T withNotNull()
{
addMatcher(NonNullityMatcher.INSTANCE);
return null;
}
/**
* Same as {@link #withEqual(Object)}, but checking that an invocation argument in the replay phase is the exact same
* instance as the one in the recorded/verified invocation.
*
* @param object the desired instance
* @return the given object
*
* @see Tutorial
*/
protected final T withSameInstance(T object)
{
addMatcher(new SamenessMatcher(object));
return object;
}
// Text-related matchers ///////////////////////////////////////////////////////////////////////////////////////////
/**
* Same as {@link #withEqual(Object)}, but checking that a textual invocation argument in the replay phase contains
* the given text as a substring.
*
* @param text an arbitrary non-null textual value
*
* @return the given text
*
* @see Tutorial
*/
protected final T withSubstring(T text)
{
addMatcher(new StringContainmentMatcher(text));
return text;
}
/**
* Same as {@link #withEqual(Object)}, but checking that a textual invocation argument in the replay phase starts
* with the given text.
*
* @param text an arbitrary non-null textual value
*
* @return the given text
*
* @see Tutorial
*/
protected final T withPrefix(T text)
{
addMatcher(new StringPrefixMatcher(text));
return text;
}
/**
* Same as {@link #withEqual(Object)}, but checking that a textual invocation argument in the replay phase ends with
* the given text.
*
* @param text an arbitrary non-null textual value
*
* @return the given text
*
* @see Tutorial
*/
protected final T withSuffix(T text)
{
addMatcher(new StringSuffixMatcher(text));
return text;
}
/**
* Same as {@link #withEqual(Object)}, but checking that a textual invocation argument in the replay phase matches
* the given {@link Pattern regular expression}.
*
* Note that this can be used for any string comparison, including case insensitive ones (with {@code "(?i)"} in the
* regex).
*
* @param regex an arbitrary (non-null) regular expression against which textual argument values will be matched
*
* @return the given regex
*
* @see Pattern#compile(String, int)
* @see Tutorial
*/
protected final T withMatch(T regex)
{
addMatcher(new PatternMatcher(regex.toString()));
return regex;
}
}
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