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Fix System.setErr/setOut methods

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This commit is contained in:
Alexey Andreev 2017-05-07 21:32:35 +03:00
parent 293e82a3c0
commit e884bb35c9
2 changed files with 25 additions and 9 deletions
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16
classlib/src/main/java/org/teavm/classlib/java/lang/SystemNativeGenerator.java
View File

@ -17,17 +17,17 @@ package org.teavm.classlib.java.lang;
import java.io.IOException;
import org.teavm.backend.javascript.codegen.SourceWriter;
import org.teavm.dependency.*;
import org.teavm.backend.javascript.spi.Generator;
import org.teavm.backend.javascript.spi.GeneratorContext;
import org.teavm.dependency.DependencyAgent;
import org.teavm.dependency.DependencyNode;
import org.teavm.dependency.DependencyPlugin;
import org.teavm.dependency.FieldDependency;
import org.teavm.dependency.MethodDependency;
import org.teavm.model.CallLocation;
import org.teavm.model.FieldReference;
import org.teavm.model.MethodReference;
/**
*
* @author Alexey Andreev
*/
public class SystemNativeGenerator implements Generator, DependencyPlugin {
@Override
public void generate(GeneratorContext context, SourceWriter writer, MethodReference methodRef) throws IOException {
@ -39,13 +39,11 @@ public class SystemNativeGenerator implements Generator, DependencyPlugin {
generateCurrentTimeMillis(writer);
break;
case "setOut":
writer.appendClass("java.lang.System").append('.')
.appendField(new FieldReference("java.lang.System", "out"))
writer.appendStaticField(new FieldReference("java.lang.System", "out"))
.ws().append('=').ws().append(context.getParameterName(1)).append(";").softNewLine();
break;
case "setErr":
writer.appendClass("java.lang.System").append('.')
.appendField(new FieldReference("java.lang.System", "err"))
writer.appendStaticField(new FieldReference("java.lang.System", "err"))
.ws().append('=').ws().append(context.getParameterName(1)).append(";").softNewLine();
break;
}

18
tests/src/test/java/org/teavm/classlib/java/lang/SystemTest.java
View File

@ -16,6 +16,8 @@
package org.teavm.classlib.java.lang;
import static org.junit.Assert.*;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.teavm.junit.TeaVMTestRunner;
@ -104,4 +106,20 @@ public class SystemTest {
public void failsToCopyToNullTarget() {
System.arraycopy(new Object[1], 0, null, 0, 1);
}
@Test
public void overridesStdErrAndOut() {
ByteArrayOutputStream err = new ByteArrayOutputStream();
ByteArrayOutputStream out = new ByteArrayOutputStream();
System.setErr(new PrintStream(err));
System.setOut(new PrintStream(out));
System.out.println("out overridden");
System.out.flush();
System.err.println("err overridden");
System.err.flush();
assertEquals("err overridden\n", new String(err.toByteArray()));
assertEquals("out overridden\n", new String(out.toByteArray()));
}
}