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/*
* Copyright 2009 The Closure Compiler Authors.
*
* 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 com.google.javascript.jscomp;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Lists;
import com.google.javascript.jscomp.GatherSideEffectSubexpressionsCallback.GetReplacementSideEffectSubexpressions;
import com.google.javascript.rhino.Node;
import com.google.javascript.rhino.Token;
import junit.framework.TestCase;
import java.util.List;
/**
* Tests for {@link GatherSideEffectSubexpressionsCallback}
*
*/
public class GatherSideEffectSubexpressionsCallbackTest extends TestCase {
public void testAndOr() throws Exception {
Node andNode = getSideEffectsAndNode();
checkKeepSimplifiedShortCircuitExpr(andNode,
ImmutableList.of("foo&&(bar=0)"));
}
public void testIllegalArgumentIfNotAndOr() throws Exception {
Node nameNode = Node.newString(Token.NAME, "foo");
try {
checkKeepSimplifiedShortCircuitExpr(nameNode,
ImmutableList.<String>of());
fail("Expected exception");
} catch (IllegalArgumentException e) {
// ignore
}
}
public void testIllegalArgumentIfNoSideEffectAndOr() throws Exception {
Node andNode = getNoSideEffectsAndNode();
try {
checkKeepSimplifiedShortCircuitExpr(andNode,
ImmutableList.<String>of());
fail("Expected exception");
} catch (IllegalArgumentException e) {
// ignore
}
}
public void testHook() throws Exception {
Node hook = getSideEffectsHookNode();
checkKeepSimplifiedHookExpr(hook,
true,
true,
ImmutableList.of("foo?bar=0:baz=0"));
}
public void testIllegalArgumentIfNotHook() throws Exception {
Node nameNode = Node.newString(Token.NAME, "foo");
try {
checkKeepSimplifiedHookExpr(nameNode,
true,
true,
ImmutableList.<String>of());
fail("Expected exception");
} catch (IllegalArgumentException e) {
// ignore
}
}
public void testIllegalArgumentIfNoSideEffectHook() throws Exception {
Node hookNode = getNoSideEffectsHookNode();
try {
checkKeepSimplifiedHookExpr(hookNode,
true,
true,
ImmutableList.<String>of());
fail("Expected exception");
} catch (IllegalArgumentException e) {
// ignore
}
}
public void testIllegalArgumentIfHookKeepNeitherBranch() throws Exception {
Node hookNode = getSideEffectsHookNode();
try {
checkKeepSimplifiedHookExpr(hookNode,
false,
false,
ImmutableList.<String>of());
fail("Expected exception");
} catch (IllegalArgumentException e) {
// ignore
}
}
private Node getNoSideEffectsAndNode() {
Node andNode = new Node(Token.AND);
andNode.addChildToBack(Node.newString(Token.NAME, "foo"));
andNode.addChildToBack(Node.newString(Token.NAME, "bar"));
return andNode;
}
private Node getSideEffectsAndNode() {
Node andNode = new Node(Token.AND);
Node assign = new Node(Token.ASSIGN);
assign.addChildToBack(Node.newString(Token.NAME, "bar"));
assign.addChildToBack(Node.newNumber(0));
andNode.addChildToBack(Node.newString(Token.NAME, "foo"));
andNode.addChildToBack(assign);
return andNode;
}
private Node getNoSideEffectsHookNode() {
Node hookNode = new Node(Token.HOOK);
hookNode.addChildToBack(Node.newString(Token.NAME, "foo"));
hookNode.addChildToBack(Node.newString(Token.NAME, "bar"));
hookNode.addChildToBack(Node.newString(Token.NAME, "baz"));
return hookNode;
}
private Node getSideEffectsHookNode() {
Node hookNode = new Node(Token.HOOK);
Node assign1 = new Node(Token.ASSIGN);
assign1.addChildToBack(Node.newString(Token.NAME, "bar"));
assign1.addChildToBack(Node.newNumber(0));
Node assign2 = new Node(Token.ASSIGN);
assign2.addChildToBack(Node.newString(Token.NAME, "baz"));
assign2.addChildToBack(Node.newNumber(0));
hookNode.addChildToBack(Node.newString(Token.NAME, "foo"));
hookNode.addChildToBack(assign1);
hookNode.addChildToBack(assign2);
return hookNode;
}
private void checkKeepSimplifiedShortCircuitExpr(Node root,
List<String> expected) {
Compiler compiler = new Compiler();
List<Node> replacements = Lists.newArrayList();
GetReplacementSideEffectSubexpressions accumulator =
new GetReplacementSideEffectSubexpressions(compiler, replacements);
accumulator.keepSimplifiedShortCircuitExpression(root);
List<String> actual = Lists.newArrayList();
for (Node replacement : replacements) {
actual.add(compiler.toSource(replacement));
}
assertEquals(expected, actual);
}
private void checkKeepSimplifiedHookExpr(Node root,
boolean thenHasSideEffects,
boolean elseHasSideEffects,
List<String> expected) {
Compiler compiler = new Compiler();
List<Node> replacements = Lists.newArrayList();
GetReplacementSideEffectSubexpressions accumulator =
new GetReplacementSideEffectSubexpressions(compiler, replacements);
accumulator.keepSimplifiedHookExpression(root,
thenHasSideEffects,
elseHasSideEffects);
List<String> actual = Lists.newArrayList();
for (Node replacement : replacements) {
actual.add(compiler.toSource(replacement));
}
assertEquals(expected, actual);
}
}
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