/**
* Copyright (C) 2009-2013 FoundationDB, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.foundationdb.server.types.service;
import com.foundationdb.junit.NamedParameterizedRunner;
import com.foundationdb.junit.Parameterization;
import com.foundationdb.junit.ParameterizationBuilder;
import com.foundationdb.server.types.*;
import com.foundationdb.server.types.TypesTestClass;
import com.foundationdb.server.types.service.OverloadsFolder;
import com.foundationdb.server.types.service.ResolvablesRegistry;
import com.foundationdb.server.types.value.ValueSource;
import com.foundationdb.server.types.value.ValueTarget;
import com.foundationdb.server.types.texpressions.TInputSetBuilder;
import com.foundationdb.server.types.texpressions.TScalarBase;
import com.foundationdb.server.types.texpressions.TValidatedScalar;
import com.google.common.base.Function;
import org.junit.Test;
import org.junit.runner.RunWith;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import static org.junit.Assert.assertEquals;
@RunWith(NamedParameterizedRunner.class)
public final class OverloadsFolderTest {
@NamedParameterizedRunner.TestParameters
public static Collection<Parameterization> params() {
Cases test = new Cases();
// "Sandwiched" overloads:
test.overloads(
"A, B...",
"C, D...",
"E, B...")
.differentAt(0).differentAt(1).differentAt(100);
// fixed arity
test.overloads(
"A")
.sameAt(0).undefinedAt(1).undefinedAt(100);
test.overloads(
"A",
"B")
.differentAt(0).undefinedAt(1).undefinedAt(100);
test.overloads(
"A",
"A")
.sameAt(0).undefinedAt(1).undefinedAt(100);
// one vararg
test.overloads(
"A...")
.sameAt(0).sameAt(1).sameAt(100);
// vararg + fixed arity
test.overloads(
"A",
"B...")
.differentAt(0).sameAt(1).sameAt(100);
test.overloads(
"A, B",
"A, A...")
.sameAt(0).differentAt(1).sameAt(2).sameAt(100);
test.overloads(
"A",
"A...")
.sameAt(0).sameAt(1).sameAt(100);
test.overloads(
"B...",
"B")
.sameAt(0).sameAt(1).sameAt(100);
test.overloads(
"A",
"A...",
"B...")
.differentAt(0).differentAt(1).differentAt(100);
test.overloads(
"A...",
"B",
"A, B, A...")
.differentAt(0).differentAt(1).sameAt(2).sameAt(100);
// two varargs
test.overloads( // note: this isn't allowed by other types components, but let's check it anyway
"A...",
"A...")
.sameAt(0).sameAt(1).sameAt(100);
test.overloads(
"A...",
"B...")
.differentAt(0).differentAt(1).differentAt(100);
test.overloads(
"A...",
"B, B...")
.differentAt(0).differentAt(1).differentAt(100);
test.overloads(
"A...",
"A, A...")
.sameAt(0).sameAt(1).sameAt(100);
test.overloads(
"A, B, A",
"A...")
.sameAt(0).differentAt(1).sameAt(2).sameAt(100);
test.overloads(
"A, B, A...",
"A...")
.sameAt(0).differentAt(1).sameAt(2).sameAt(100);
test.overloads(
"A, B, C...",
"A...")
.sameAt(0).differentAt(1).differentAt(2).differentAt(100);
// four overloads
test.overloads(
"A, B",
"B...",
"C, B, D",
"E")
.differentAt(0).sameAt(1).differentAt(2).sameAt(3).sameAt(100);
// overloads take ANY
test.overloads(
"?",
"?")
.sameAt(0).undefinedAt(1);
test.overloads(
"A",
"?")
.sameAt(0).undefinedAt(1);
test.overloads(
"?",
"A")
.sameAt(0).undefinedAt(1);
test.overloads(
"?...")
.sameAt(0).sameAt(1).sameAt(100);
return test.build();
}
@Test
public void sameTypeAt() {
assertEquals(sameTypeAtExpected, foldResult.at(pos, null));
}
public OverloadsFolderTest(OverloadsFolder.Result<Boolean> foldResult, int pos, Boolean sameTypeAtExpected) {
this.foldResult = foldResult;
this.pos = pos;
this.sameTypeAtExpected = sameTypeAtExpected;
}
private final OverloadsFolder.Result<Boolean> foldResult;
private final int pos;
private final Boolean sameTypeAtExpected;
private static final Function<TClass, Boolean> notNull = new Function<TClass, Boolean>() {
@Override
public Boolean apply(TClass input) {
return input != ResolvablesRegistry.differentTargetTypes;
}
};
private static class Cases {
public Cases overloads(String... overloads) {
flush();
this.overloadDefs = overloads;
this.expectations = new HashMap<>();
return this;
}
public Cases sameAt(int pos) {
expectations.put(pos, Boolean.TRUE);
return this;
}
public Cases differentAt(int pos) {
expectations.put(pos, Boolean.FALSE);
return this;
}
public Cases undefinedAt(int pos) {
expectations.put(pos, null);
return this;
}
public Collection<Parameterization> build() {
flush();
return pb.asList();
}
private void flush() {
if (overloadDefs == null) {
assert expectations == null : expectations;
return; // must have been the first call to start()
}
Collection<TValidatedScalar> overloads = new ArrayList<>();
for (String overloadDef : overloadDefs) {
TScalar scalar = parse(overloadDef);
TValidatedScalar validated = new TValidatedScalar(scalar);
overloads.add(validated);
}
OverloadsFolder.Result<TClass> foldToClass = ResolvablesRegistry.sameInputSets.fold(overloads);
OverloadsFolder.Result<Boolean> foldResult = foldToClass.transform(notNull);
StringBuilder overloadsDescBuilder = new StringBuilder();
for (int i = 0; i < overloadDefs.length; i++) {
String overloadDef = overloadDefs[i];
overloadsDescBuilder.append(FUNC_NAME).append('(').append(overloadDef).append(')');
if (i + 1 < overloadDefs.length)
overloadsDescBuilder.append(", ");
}
String overloadsDescr = overloadsDescBuilder.toString();
for (Map.Entry<Integer, Boolean> expected : expectations.entrySet()) {
int pos = expected.getKey();
Boolean sameTypeAt = expected.getValue();
String caseName = overloadsDescr + " at " + pos;
pb.add(caseName, foldResult, pos, sameTypeAt);
}
}
private TScalar parse(final String overloadDef) {
return new TScalarBase() {
@Override
protected void buildInputSets(TInputSetBuilder builder) {
String[] args = overloadDef.split(", *");
for (int pos = 0; pos < args.length; pos++) {
String arg = args[pos];
boolean isVararg = false;
if (arg.endsWith("...")) {
isVararg = true;
arg = arg.substring(0, arg.length() - 3);
}
assert arg.length() == 1 : arg;
char argChar = arg.charAt(0);
TClass tClass;
if (argChar == '?') {
tClass = null;
}
else {
assert Character.isLetter(argChar) : arg;
tClass = tClasses.get(arg);
if (tClass == null) {
tClass = new TypesTestClass(arg);
tClasses.put(arg, tClass);
}
}
if (isVararg)
builder.vararg(tClass);
else
builder.covers(tClass, pos);
}
}
@Override
protected void doEvaluate(TExecutionContext context, LazyList<? extends ValueSource> inputs,
ValueTarget output) {
throw new UnsupportedOperationException();
}
@Override
public String displayName() {
return "FOO";
}
@Override
public TOverloadResult resultType() {
return TOverloadResult.fixed(RET_TYPE);
}
};
}
private final ParameterizationBuilder pb = new ParameterizationBuilder();
private final Map<String,TClass> tClasses = new HashMap<>();
private String[] overloadDefs;
private Map<Integer, Boolean> expectations;
}
private static final String FUNC_NAME = "FOO";
private static final TClass RET_TYPE = new TypesTestClass("R");
}