dev/core/test/com/google/gwt/dev/js/JsReportGenerationVisitorTest.java - gwt - Git at Google

 /*
  * Copyright 2014 Google Inc.
  *
  * 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.gwt.dev.js;

 import com.google.gwt.core.ext.soyc.Range;
 import com.google.gwt.dev.jjs.JsSourceMap;
 import com.google.gwt.dev.jjs.SourceInfo;
 import com.google.gwt.dev.jjs.SourceOrigin;
 import com.google.gwt.dev.jjs.impl.JavaToJavaScriptMap;
 import com.google.gwt.dev.js.ast.JsProgram;
 import com.google.gwt.dev.js.ast.JsStatement;
 import com.google.gwt.dev.util.DefaultTextOutput;
 import com.google.gwt.thirdparty.guava.common.collect.Lists;

 import junit.framework.TestCase;

 import java.io.IOException;
 import java.io.StringReader;
 import java.util.Collections;
 import java.util.List;

 /**
  * Verifies that the generator returns sourcemaps whose keys are the correct ranges of
  * JavaScript. (Doesn't check that they point to the right place.)
  */
 public class JsReportGenerationVisitorTest extends TestCase {
   boolean compact = false;

   // If true, list all the JavaScript ranges where a Java method might be inlined.
   boolean includeInlinedRanges = false;

   JsProgram program;

   public void testEmpty() throws Exception {
     program = parseJs("");
     checkMappings();
   }

   public void testAssignmentDraft() throws Exception {
     program = parseJs("x = 1");
     checkMappings(
         "x = 1;\n"
     );
   }

   public void testAssignmentCompact() throws Exception {
     compact = true;
     program = parseJs("x = 1");
     checkMappings(
         "x=1;"
     );
   }

   public void testAssignmentCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("x = 1");
     checkMappings(
         "x=1;",
         "x",
         "1"
     );
   }

   public void testTwoStatementsDraft() throws Exception {
     program = parseJs("x = 1; y = 2");
     checkMappings(
         "x = 1;\ny = 2;\n",
         "x = 1;\n",
         "y = 2;\n"
     );
   }

   public void testTwoStatementsCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("x = 1; y = 2");
     checkMappings(
         "x=1;y=2;",
         "x=1;",
         "x",
         "1",
         "y=2;",
         "y",
         "2"
     );
   }

   public void testIfStatementDraft() throws Exception {
     program = parseJs("if(true) { x=1 } else { y=2 }");
     checkMappings(
         "if (true) {\n  x = 1;\n}\n else {\n  y = 2;\n}\n",
         "  x = 1;\n",
         "  y = 2;\n"
     );
   }

   public void testIfStatementCompactInlined() throws Exception {
     includeInlinedRanges = true;
     compact = true;
     program = parseJs("if(true) { x=1 } else { y=2 }");
     checkMappings(
         "if(true){x=1}else{y=2}",
         "x=1",
         "x",
         "1",
         "y=2",
         "y",
         "2"
     );
   }

   public void testFunctionDraft() throws Exception {
     program = parseJs("function f() { return 42; }");
     checkMappings(
         "function f(){\n  return 42;\n}\n\n",
         "function f(){\n  return 42;\n}\n",
         "  return 42;\n"
     );
   }

   public void testFunctionCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("function f() { return 42; }");
     checkMappings("function f(){return 42}\n",
         "function f(){return 42}",
         "return 42",
         "42"
     );
   }

   public void testTryStatementDraft() throws Exception {
     program = parseJs("try { 123 } catch (e) { 456 } finally { 789 }");
     checkMappings(
         "try {\n  123;\n}\n catch (e) {\n  456;\n}\n finally {\n  789;\n}\n",
         "  123;\n",
         "  456;\n",
         "  789;\n"
     );
   }

   public void testTryStatementCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("try{ 123 } catch (e) { 456 } finally { 789 }");
     checkMappings(
         "try{123}catch(e){456}finally{789}",
         "123",
         "456",
         "789"
     );
   }

   public void testDoWhileDraft() throws Exception {
     program = parseJs("do { something() } while (x>1)");
     checkMappings(
         "do {\n  something();\n}\n while (x > 1);\n",
         "  something();\n",
         "x > 1"
     );
   }

   public void testForStatementDraft() throws Exception {
     program = parseJs("for (var i = 0; i < 10; i++) { something() }");
     checkMappings(
         "for (var i = 0; i < 10; i++) {\n  something();\n}\n",
         "var i = 0;", // a separate range because it's a statement TODO: remove?
         "  something();\n"
     );
   }

   public void testForInStatementDraft() throws Exception {
     program = parseJs("for (var x in someIterable) { something() }");
     checkMappings(
         "for (var x in someIterable) {\n  something();\n}\n",
         "  something();\n"
     );
   }

   public void testSwitchStatementDraft() throws Exception {
     program = parseJs("switch (abc) { case c1: s1; break; case c2: s2; default: s3 }");
     checkMappings(
         "switch (abc) {\n  case c1:\n    s1;\n    break;\n  case c2:\n    s2;\n  default:s3;\n}\n",
         "    s1;",
         "    break;",
         "    s2;",
         "s3;"
     );
   }

   public void testSwitchStatementCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("switch (abc) { case c1: s1; break; case c2: s2; default: s3 }");
     checkMappings(
         "switch(abc){case c1:s1;break;case c2:s2;default:s3;}",
         "abc",
         "c1",
         "s1;",
         "break;",
         "c2",
         "s2;",
         "s3;"
     );
   }

   public void testWhileStatementDraft() throws Exception {
     program = parseJs("while (a>2) { a--; }");
     checkMappings(
       "while (a > 2) {\n  a--;\n}\n",
        "  a--;\n"
     );
   }

   public void testWhileStatementCompactInlined() throws Exception {
     compact = true;
     includeInlinedRanges = true;
     program = parseJs("while (a>2) { a--; }");
     checkMappings(
         "while(a>2){a--}",
         "a>2",
         "a",
         "2",
         "a--",
         "a"
     );
   }

   private JsProgram parseJs(String js) throws IOException, JsParserException {
     JsProgram program = new JsProgram();
     SourceInfo info = SourceOrigin.create(0, js.length(), 123, "test.js");
     List<JsStatement> statements = JsParser.parse(info, program.getScope(),
         new StringReader(js));
     program.getGlobalBlock().getStatements().addAll(statements);
     return program;
   }

   private void checkMappings(String ...expectedLines)
       throws IOException, JsParserException {
     DefaultTextOutput text = new DefaultTextOutput(compact);
     JsReportGenerationVisitor generator = new JsReportGenerationVisitor(text,
         JavaToJavaScriptMap.EMPTY, false) {
       @Override
       boolean surroundsInJavaSource(SourceInfo parent, SourceInfo child) {
         // The Rhino-based JavaScript parser doesn't provide character ranges
         // in SourceInfo. Therefore we can't test this method directly
         // and have to mock it out.
         return !includeInlinedRanges;
       }
     };
     generator.accept(program);
     String actual = dumpMappings(text.toString(), generator.getSourceInfoMap());

     StringBuilder expected = new StringBuilder();
     expected.append("Mappings:\n");
     for (String line : expectedLines) {
       expected.append(escape(line));
       expected.append("\n");
     }

     assertEquals(expected.toString(), actual);
   }

   private String dumpMappings(String javascript, JsSourceMap mappings) {
     List<Range> ranges = Lists.newArrayList(mappings.getRanges());
     Collections.sort(ranges, Range.DEPENDENCY_ORDER_COMPARATOR);

     StringBuilder out = new StringBuilder();
     out.append("Mappings:\n");
     for (Range r : ranges) {
       String js = javascript.substring(r.getStart(), r.getEnd());
       out.append(escape(js));
       out.append("\n");
     }
     return out.toString();
   }

   /**
    * Escape newlines in a readable way so that each range is on one line for comparison.
    */
   private String escape(String js) {
     return js.replace("\\n", "\\\\n").replace("\n", "\\n");
   }
 }
	/*
	* Copyright 2014 Google Inc.
	*
	* 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.gwt.dev.js;

	import com.google.gwt.core.ext.soyc.Range;
	import com.google.gwt.dev.jjs.JsSourceMap;
	import com.google.gwt.dev.jjs.SourceInfo;
	import com.google.gwt.dev.jjs.SourceOrigin;
	import com.google.gwt.dev.jjs.impl.JavaToJavaScriptMap;
	import com.google.gwt.dev.js.ast.JsProgram;
	import com.google.gwt.dev.js.ast.JsStatement;
	import com.google.gwt.dev.util.DefaultTextOutput;
	import com.google.gwt.thirdparty.guava.common.collect.Lists;

	import junit.framework.TestCase;

	import java.io.IOException;
	import java.io.StringReader;
	import java.util.Collections;
	import java.util.List;

	/**
	* Verifies that the generator returns sourcemaps whose keys are the correct ranges of
	* JavaScript. (Doesn't check that they point to the right place.)
	*/
	public class JsReportGenerationVisitorTest extends TestCase {
	boolean compact = false;

	// If true, list all the JavaScript ranges where a Java method might be inlined.
	boolean includeInlinedRanges = false;

	JsProgram program;

	public void testEmpty() throws Exception {
	program = parseJs("");
	checkMappings();
	}

	public void testAssignmentDraft() throws Exception {
	program = parseJs("x = 1");
	checkMappings(
	"x = 1;\n"
	);
	}

	public void testAssignmentCompact() throws Exception {
	compact = true;
	program = parseJs("x = 1");
	checkMappings(
	"x=1;"
	);
	}

	public void testAssignmentCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("x = 1");
	checkMappings(
	"x=1;",
	"x",
	"1"
	);
	}

	public void testTwoStatementsDraft() throws Exception {
	program = parseJs("x = 1; y = 2");
	checkMappings(
	"x = 1;\ny = 2;\n",
	"x = 1;\n",
	"y = 2;\n"
	);
	}

	public void testTwoStatementsCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("x = 1; y = 2");
	checkMappings(
	"x=1;y=2;",
	"x=1;",
	"x",
	"1",
	"y=2;",
	"y",
	"2"
	);
	}

	public void testIfStatementDraft() throws Exception {
	program = parseJs("if(true) { x=1 } else { y=2 }");
	checkMappings(
	"if (true) {\n x = 1;\n}\n else {\n y = 2;\n}\n",
	" x = 1;\n",
	" y = 2;\n"
	);
	}

	public void testIfStatementCompactInlined() throws Exception {
	includeInlinedRanges = true;
	compact = true;
	program = parseJs("if(true) { x=1 } else { y=2 }");
	checkMappings(
	"if(true){x=1}else{y=2}",
	"x=1",
	"x",
	"1",
	"y=2",
	"y",
	"2"
	);
	}

	public void testFunctionDraft() throws Exception {
	program = parseJs("function f() { return 42; }");
	checkMappings(
	"function f(){\n return 42;\n}\n\n",
	"function f(){\n return 42;\n}\n",
	" return 42;\n"
	);
	}

	public void testFunctionCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("function f() { return 42; }");
	checkMappings("function f(){return 42}\n",
	"function f(){return 42}",
	"return 42",
	"42"
	);
	}

	public void testTryStatementDraft() throws Exception {
	program = parseJs("try { 123 } catch (e) { 456 } finally { 789 }");
	checkMappings(
	"try {\n 123;\n}\n catch (e) {\n 456;\n}\n finally {\n 789;\n}\n",
	" 123;\n",
	" 456;\n",
	" 789;\n"
	);
	}

	public void testTryStatementCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("try{ 123 } catch (e) { 456 } finally { 789 }");
	checkMappings(
	"try{123}catch(e){456}finally{789}",
	"123",
	"456",
	"789"
	);
	}

	public void testDoWhileDraft() throws Exception {
	program = parseJs("do { something() } while (x>1)");
	checkMappings(
	"do {\n something();\n}\n while (x > 1);\n",
	" something();\n",
	"x > 1"
	);
	}

	public void testForStatementDraft() throws Exception {
	program = parseJs("for (var i = 0; i < 10; i++) { something() }");
	checkMappings(
	"for (var i = 0; i < 10; i++) {\n something();\n}\n",
	"var i = 0;", // a separate range because it's a statement TODO: remove?
	" something();\n"
	);
	}

	public void testForInStatementDraft() throws Exception {
	program = parseJs("for (var x in someIterable) { something() }");
	checkMappings(
	"for (var x in someIterable) {\n something();\n}\n",
	" something();\n"
	);
	}

	public void testSwitchStatementDraft() throws Exception {
	program = parseJs("switch (abc) { case c1: s1; break; case c2: s2; default: s3 }");
	checkMappings(
	"switch (abc) {\n case c1:\n s1;\n break;\n case c2:\n s2;\n default:s3;\n}\n",
	" s1;",
	" break;",
	" s2;",
	"s3;"
	);
	}

	public void testSwitchStatementCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("switch (abc) { case c1: s1; break; case c2: s2; default: s3 }");
	checkMappings(
	"switch(abc){case c1:s1;break;case c2:s2;default:s3;}",
	"abc",
	"c1",
	"s1;",
	"break;",
	"c2",
	"s2;",
	"s3;"
	);
	}

	public void testWhileStatementDraft() throws Exception {
	program = parseJs("while (a>2) { a--; }");
	checkMappings(
	"while (a > 2) {\n a--;\n}\n",
	" a--;\n"
	);
	}

	public void testWhileStatementCompactInlined() throws Exception {
	compact = true;
	includeInlinedRanges = true;
	program = parseJs("while (a>2) { a--; }");
	checkMappings(
	"while(a>2){a--}",
	"a>2",
	"a",
	"2",
	"a--",
	"a"
	);
	}

	private JsProgram parseJs(String js) throws IOException, JsParserException {
	JsProgram program = new JsProgram();
	SourceInfo info = SourceOrigin.create(0, js.length(), 123, "test.js");
	List<JsStatement> statements = JsParser.parse(info, program.getScope(),
	new StringReader(js));
	program.getGlobalBlock().getStatements().addAll(statements);
	return program;
	}

	private void checkMappings(String ...expectedLines)
	throws IOException, JsParserException {
	DefaultTextOutput text = new DefaultTextOutput(compact);
	JsReportGenerationVisitor generator = new JsReportGenerationVisitor(text,
	JavaToJavaScriptMap.EMPTY, false) {
	@Override
	boolean surroundsInJavaSource(SourceInfo parent, SourceInfo child) {
	// The Rhino-based JavaScript parser doesn't provide character ranges
	// in SourceInfo. Therefore we can't test this method directly
	// and have to mock it out.
	return !includeInlinedRanges;
	}
	};
	generator.accept(program);
	String actual = dumpMappings(text.toString(), generator.getSourceInfoMap());

	StringBuilder expected = new StringBuilder();
	expected.append("Mappings:\n");
	for (String line : expectedLines) {
	expected.append(escape(line));
	expected.append("\n");
	}

	assertEquals(expected.toString(), actual);
	}

	private String dumpMappings(String javascript, JsSourceMap mappings) {
	List<Range> ranges = Lists.newArrayList(mappings.getRanges());
	Collections.sort(ranges, Range.DEPENDENCY_ORDER_COMPARATOR);

	StringBuilder out = new StringBuilder();
	out.append("Mappings:\n");
	for (Range r : ranges) {
	String js = javascript.substring(r.getStart(), r.getEnd());
	out.append(escape(js));
	out.append("\n");
	}
	return out.toString();
	}

	/**
	* Escape newlines in a readable way so that each range is on one line for comparison.
	*/
	private String escape(String js) {
	return js.replace("\\n", "\\\\n").replace("\n", "\\n");
	}
	}