/*
* Copyright 2011 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.debugging.sourcemap;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Maps;
import com.google.debugging.sourcemap.proto.Mapping.OriginalMapping;
import com.google.javascript.jscomp.Compiler;
import com.google.javascript.jscomp.CompilerOptions;
import com.google.javascript.jscomp.Result;
import com.google.javascript.jscomp.SourceFile;
import com.google.javascript.jscomp.SourceMap;
import com.google.javascript.jscomp.SourceMap.DetailLevel;
import junit.framework.TestCase;
import java.io.IOException;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
/**
* @author johnlenz@google.com (John Lenz)
*/
public abstract class SourceMapTestCase extends TestCase {
private boolean validateColumns = true;
public SourceMapTestCase() {
}
void disableColumnValidation() {
validateColumns = false;
}
static final List<SourceFile> EXTERNS = ImmutableList.of(
SourceFile.fromCode("externs", ""));
protected DetailLevel detailLevel = SourceMap.DetailLevel.ALL;
protected static class RunResult {
String generatedSource;
SourceMap sourceMap;
public String sourceMapFileContent;
}
protected static class Token {
final String tokenName;
final String inputName;
final FilePosition position;
Token(String tokenName, String inputName, FilePosition position) {
this.tokenName = tokenName;
this.inputName = inputName;
this.position = position;
}
}
@Override
public void setUp() {
detailLevel = SourceMap.DetailLevel.ALL;
}
/**
* Creates a source map for the given JS code and asserts it is
* equal to the expected golden map.
*/
protected void checkSourceMap(String js, String expectedMap)
throws IOException {
checkSourceMap("testcode", js, expectedMap);
}
protected String getSourceMap(RunResult result) throws IOException {
StringBuilder sb = new StringBuilder();
result.sourceMap.appendTo(sb, "testcode");
return sb.toString();
}
protected void checkSourceMap(String fileName, String js, String expectedMap)
throws IOException {
RunResult result = compile(js, fileName);
assertEquals(expectedMap, result.sourceMapFileContent);
assertEquals(result.sourceMapFileContent, getSourceMap(result));
}
/**
* Finds the all the __XX__ tokens in the given JavaScript
* string.
*/
private Map<String, Token> findTokens(Map<String, String> inputs) {
Map<String, Token> tokens = Maps.newLinkedHashMap();
for (Entry<String, String> entry : inputs.entrySet()) {
findTokens(tokens, entry.getKey(), entry.getValue());
}
return tokens;
}
/**
* Finds the all the __XX__ tokens in the given JavaScript
* string.
*/
private Map<String, Token> findTokens(String src) {
Map<String, Token> tokens = Maps.newLinkedHashMap();
findTokens(tokens, "", src);
return tokens;
}
/**
* Finds the all the __XX__ tokens in the given JavaScript
* string.
*/
private Map<String, Token> findTokens(
Map<String, Token> tokens, String inputName, String js) {
int currentLine = 0;
int positionOffset = 0;
for (int i = 0; i < js.length(); ++i) {
char current = js.charAt(i);
if (current == '\n') {
positionOffset = i + 1;
currentLine++;
continue;
}
if (current == '_' && (i < js.length() - 5)) {
// Check for the _ token.
if (js.charAt(i + 1) != '_') {
continue;
}
// Loop until we have another _ token.
String tokenName = "";
int j = i + 2;
for (; j < js.length(); ++j) {
if (js.charAt(j) == '_') {
break;
}
tokenName += js.charAt(j);
}
if (tokenName.length() > 0) {
int currentPosition = i - positionOffset;
Token token = new Token(
tokenName, inputName,
new FilePosition(currentLine, currentPosition));
tokens.put(tokenName, token);
}
i = j;
}
}
return tokens;
}
protected abstract SourceMap.Format getSourceMapFormat();
protected abstract SourceMapConsumer getSourceMapConsumer();
protected void compileAndCheck(String js) {
String inputName = "testcode";
RunResult result = compile(js, inputName);
check(inputName, js, result.generatedSource, result.sourceMapFileContent);
}
protected void check(
String inputName, String input, String output,
String sourceMapFileContent) {
Map<String, String> inputMap = new LinkedHashMap<>();
inputMap.put(inputName, input);
check(inputMap, output, sourceMapFileContent);
}
protected void check(
Map<String, String> originalInputs, String generatedSource,
String sourceMapFileContent) {
check(originalInputs, generatedSource, sourceMapFileContent, null);
}
protected void check(
Map<String, String> originalInputs, String generatedSource,
String sourceMapFileContent, SourceMapSupplier supplier) {
// Find all instances of the __XXX__ pattern in the original
// source code.
Map<String, Token> originalTokens = findTokens(originalInputs);
// Find all instances of the __XXX__ pattern in the generated
// source code.
Map<String, Token> resultTokens = findTokens(generatedSource);
// Ensure that the generated instances match via the source map
// to the original source code.
// Ensure the token counts match.
assertEquals(originalTokens.size(), resultTokens.size());
SourceMapping reader;
try {
reader = SourceMapConsumerFactory.parse(sourceMapFileContent, supplier);
} catch (SourceMapParseException e) {
throw new RuntimeException("unexpected exception", e);
}
// Map the tokens from the generated source back to the
// input source and ensure that the map is correct.
for (Token token : resultTokens.values()) {
OriginalMapping mapping = reader.getMappingForLine(
token.position.getLine() + 1,
token.position.getColumn() + 1);
assertNotNull(mapping);
// Find the associated token in the input source.
Token inputToken = originalTokens.get(token.tokenName);
assertNotNull(inputToken);
assertEquals(mapping.getOriginalFile(), inputToken.inputName);
// Ensure that the map correctly points to the token (we add 1
// to normalize versus the Rhino line number indexing scheme).
assertEquals(mapping.getLineNumber(),
inputToken.position.getLine() + 1);
int start = inputToken.position.getColumn() + 1;
if (inputToken.tokenName.startsWith("STR")) {
// include the preceding quote.
start--;
}
if (validateColumns) {
assertEquals(start, mapping.getColumnPosition());
}
// Ensure that if the token name does not being with an 'STR' (meaning a
// string) it has an original name.
if (!inputToken.tokenName.startsWith("STR")) {
assertFalse("missing name for " + inputToken.tokenName, mapping.getIdentifier().isEmpty());
}
// Ensure that if the mapping has a name, it matches the token.
if (!mapping.getIdentifier().isEmpty()) {
assertEquals(mapping.getIdentifier(),
"__" + inputToken.tokenName + "__");
}
}
}
protected RunResult compile(String js, String fileName) {
return compile(js, fileName, null, null);
}
protected CompilerOptions getCompilerOptions() {
CompilerOptions options = new CompilerOptions();
options.sourceMapOutputPath = "testcode_source_map.out";
options.sourceMapFormat = getSourceMapFormat();
options.sourceMapDetailLevel = detailLevel;
return options;
}
protected RunResult compile(
String js1, String fileName1, String js2, String fileName2) {
Compiler compiler = new Compiler();
CompilerOptions options = getCompilerOptions();
// Turn on IDE mode to get rid of optimizations.
options.ideMode = true;
List<SourceFile> inputs =
ImmutableList.of(SourceFile.fromCode(fileName1, js1));
if (js2 != null && fileName2 != null) {
inputs = ImmutableList.of(
SourceFile.fromCode(fileName1, js1),
SourceFile.fromCode(fileName2, js2));
}
Result result = compiler.compile(EXTERNS, inputs, options);
assertTrue("compilation failed", result.success);
String source = compiler.toSource();
StringBuilder sb = new StringBuilder();
try {
result.sourceMap.validate(true);
result.sourceMap.appendTo(sb, "testcode");
} catch (IOException e) {
throw new RuntimeException("unexpected exception", e);
}
RunResult rr = new RunResult();
rr.generatedSource = source;
rr.sourceMap = result.sourceMap;
rr.sourceMapFileContent = sb.toString();
return rr;
}
}