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/*
* Copyright 2000-2014 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.jetbrains.plugins.groovy.lang.resolve
import com.intellij.testFramework.LightProjectDescriptor
import org.jetbrains.plugins.groovy.GroovyLightProjectDescriptor
/**
* Created by Max Medvedev on 10/02/14
*/
class TypeInference2_3Test extends TypeInferenceTestBase {
@Override
protected LightProjectDescriptor getProjectDescriptor() {
return GroovyLightProjectDescriptor.GROOVY_2_3
}
public void testContravariantType() throws Exception {
doTest('''\
import groovy.transform.CompileStatic
import java.util.concurrent.Callable
@CompileStatic
class TestCase {
interface Action<T> {
void execute(T thing)
}
static class Wrapper<T> {
private final T thing
Wrapper(T thing) {
this.thing = thing
}
void contravariantTake(Action<? super T> action) {
action.execute(thing)
}
}
static <T> Wrapper<T> wrap(Callable<T> callable) {
new Wrapper(callable.call())
}
static Integer dub(Integer integer) {
integer * 2
}
static void main(String[] args) {
wrap {
1
} contravariantTake {
dub(i<caret>t) // fails static compile, 'it' is not known to be Integer
}
}
}
''', 'java.lang.Integer')
}
void testSAMInference() {
doTest('''\
import groovy.transform.CompileStatic
interface CustomCallable<T> {
T call()
}
class Thing {
static <T> T customType(CustomCallable<T> callable) {
callable.call()
}
@CompileStatic
static void run() {
customType { [] }.ad<caret>d(1) // return type is not inferred - fails compile
}
}
''', "java.lang.Boolean")
}
void testSAMInference2() {
doTest('''\
import groovy.transform.CompileStatic
interface CustomCallable<T> {
List<T> call()
}
class Thing {
static <T> T first(CustomCallable<T> callable) {
callable.call().iterator().next()
}
@CompileStatic
static void run() {
first { [[]] }.ad<caret>d(1) // return type is not inferred - fails compile
}
}
''', "java.lang.Boolean")
}
void testSAMInference3() {
doTest('''\
import groovy.transform.CompileStatic
interface CustomCallable<K, V> {
Map<K, V> call()
}
class Thing {
static <K, V> Map<K, V> customType(CustomCallable<K, V> callable) {
callable.call()
}
@CompileStatic
static void run() {
customType { [(1):3] }.pu<caret>t(1, 5) // return type is not inferred - fails compile
}
}
''', 'java.lang.Integer')
}
void testSamInference4() {
doTest('''
interface Action<T> {
void execute(T t)
}
public <T> void exec(T t, Action<T> f) {
}
def foo() {
exec('foo') {print i<caret>t.toUpperCase() ;print 2 }
}
''', 'java.lang.String')
}
void testSamInference5() {
doTest('''
interface Action<T> {
void execute(T t)
}
public <T> void exec(T t, Action<T> f) {
}
def foo() {
exec('foo') {i<caret>t.toUpperCase() }
}
''', 'java.lang.String')
}
void testSamInference6() {
doTest('''
interface Action<T> {
void execute(T t)
}
public <T> void exec(T t, Action<T> f) {
}
def foo() {
exec('foo') {print i<caret>t.toUpperCase() }
}
''', 'java.lang.String')
}
void testSamInference7() {
doTest('''
interface CustomCallable<T> {
T call()
}
class Thing {
static <T> T customType(CustomCallable<T> callable) {
}
static void run() {
customType { i<caret>t }
}
}''', null)
}
}
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