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package org.jf.util;
import com.google.common.base.Strings;
import com.google.common.io.Files;
import junit.framework.Assert;
import org.junit.Test;
import java.io.File;
import java.nio.charset.Charset;
public class ClassFileNameHandlerTest {
private final Charset UTF8 = Charset.forName("UTF-8");
@Test
public void test1ByteEncodings() {
StringBuilder sb = new StringBuilder();
for (int i=0; i<100; i++) {
sb.append((char)i);
}
String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 5);
Assert.assertEquals(95, result.getBytes(UTF8).length);
Assert.assertEquals(95, result.length());
}
@Test
public void test2ByteEncodings() {
StringBuilder sb = new StringBuilder();
for (int i=0x80; i<0x80+100; i++) {
sb.append((char)i);
}
// remove a total of 3 2-byte characters, and then add back in the 1-byte '#'
String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 4);
Assert.assertEquals(200, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(195, result.getBytes(UTF8).length);
Assert.assertEquals(98, result.length());
// remove a total of 3 2-byte characters, and then add back in the 1-byte '#'
result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 5);
Assert.assertEquals(200, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(195, result.getBytes(UTF8).length);
Assert.assertEquals(98, result.length());
}
@Test
public void test3ByteEncodings() {
StringBuilder sb = new StringBuilder();
for (int i=0x800; i<0x800+100; i++) {
sb.append((char)i);
}
// remove a total of 3 3-byte characters, and then add back in the 1-byte '#'
String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 6);
Assert.assertEquals(300, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(292, result.getBytes(UTF8).length);
Assert.assertEquals(98, result.length());
// remove a total of 3 3-byte characters, and then add back in the 1-byte '#'
result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 7);
Assert.assertEquals(300, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(292, result.getBytes(UTF8).length);
Assert.assertEquals(98, result.length());
}
@Test
public void test4ByteEncodings() {
StringBuilder sb = new StringBuilder();
for (int i=0x10000; i<0x10000+100; i++) {
sb.appendCodePoint(i);
}
// we remove 3 codepoints == 6 characters == 12 bytes, and then add back in the 1-byte '#'
String result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 8);
Assert.assertEquals(400, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(389, result.getBytes(UTF8).length);
Assert.assertEquals(195, result.length());
// we remove 2 codepoints == 4 characters == 8 bytes, and then add back in the 1-byte '#'
result = ClassFileNameHandler.shortenPathComponent(sb.toString(), 7);
Assert.assertEquals(400, sb.toString().getBytes(UTF8).length);
Assert.assertEquals(393, result.getBytes(UTF8).length);
Assert.assertEquals(197, result.length());
}
@Test
public void testMultipleLongNames() {
String filenameFragment = Strings.repeat("a", 512);
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali");
// put the differentiating character in the middle, where it will get stripped out by the filename shortening
// logic
File file1 = handler.getUniqueFilenameForClass("La/a/" + filenameFragment + "1" + filenameFragment + ";");
checkFilename(tempDir, file1, "a", "a", Strings.repeat("a", 124) + "#" + Strings.repeat("a", 118) + ".smali");
File file2 = handler.getUniqueFilenameForClass("La/a/" + filenameFragment + "2" + filenameFragment + ";");
checkFilename(tempDir, file2, "a", "a", Strings.repeat("a", 124) + "#" + Strings.repeat("a", 118) + ".1.smali");
Assert.assertFalse(file1.getAbsolutePath().equals(file2.getAbsolutePath()));
}
@Test
public void testBasicFunctionality() {
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali");
File file = handler.getUniqueFilenameForClass("La/b/c/d;");
checkFilename(tempDir, file, "a", "b", "c", "d.smali");
file = handler.getUniqueFilenameForClass("La/b/c/e;");
checkFilename(tempDir, file, "a", "b", "c", "e.smali");
file = handler.getUniqueFilenameForClass("La/b/d/d;");
checkFilename(tempDir, file, "a", "b", "d", "d.smali");
file = handler.getUniqueFilenameForClass("La/b;");
checkFilename(tempDir, file, "a", "b.smali");
file = handler.getUniqueFilenameForClass("Lb;");
checkFilename(tempDir, file, "b.smali");
}
@Test
public void testCaseInsensitiveFilesystem() {
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", false, false);
File file = handler.getUniqueFilenameForClass("La/b/c;");
checkFilename(tempDir, file, "a", "b", "c.smali");
file = handler.getUniqueFilenameForClass("La/b/C;");
checkFilename(tempDir, file, "a", "b", "C.1.smali");
file = handler.getUniqueFilenameForClass("La/B/c;");
checkFilename(tempDir, file, "a", "B.1", "c.smali");
}
@Test
public void testCaseSensitiveFilesystem() {
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", true, false);
File file = handler.getUniqueFilenameForClass("La/b/c;");
checkFilename(tempDir, file, "a", "b", "c.smali");
file = handler.getUniqueFilenameForClass("La/b/C;");
checkFilename(tempDir, file, "a", "b", "C.smali");
file = handler.getUniqueFilenameForClass("La/B/c;");
checkFilename(tempDir, file, "a", "B", "c.smali");
}
@Test
public void testWindowsReservedFilenames() {
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", false, true);
File file = handler.getUniqueFilenameForClass("La/con/c;");
checkFilename(tempDir, file, "a", "con#", "c.smali");
file = handler.getUniqueFilenameForClass("La/Con/c;");
checkFilename(tempDir, file, "a", "Con#.1", "c.smali");
file = handler.getUniqueFilenameForClass("La/b/PRN;");
checkFilename(tempDir, file, "a", "b", "PRN#.smali");
file = handler.getUniqueFilenameForClass("La/b/prN;");
checkFilename(tempDir, file, "a", "b", "prN#.1.smali");
file = handler.getUniqueFilenameForClass("La/b/com0;");
checkFilename(tempDir, file, "a", "b", "com0.smali");
for (String reservedName: new String[] {"con", "prn", "aux", "nul", "com1", "com9", "lpt1", "lpt9"}) {
file = handler.getUniqueFilenameForClass("L" + reservedName + ";");
checkFilename(tempDir, file, reservedName +"#.smali");
}
}
@Test
public void testIgnoringWindowsReservedFilenames() {
File tempDir = Files.createTempDir();
ClassFileNameHandler handler = new ClassFileNameHandler(tempDir, ".smali", true, false);
File file = handler.getUniqueFilenameForClass("La/con/c;");
checkFilename(tempDir, file, "a", "con", "c.smali");
file = handler.getUniqueFilenameForClass("La/Con/c;");
checkFilename(tempDir, file, "a", "Con", "c.smali");
file = handler.getUniqueFilenameForClass("La/b/PRN;");
checkFilename(tempDir, file, "a", "b", "PRN.smali");
file = handler.getUniqueFilenameForClass("La/b/prN;");
checkFilename(tempDir, file, "a", "b", "prN.smali");
file = handler.getUniqueFilenameForClass("La/b/com0;");
checkFilename(tempDir, file, "a", "b", "com0.smali");
for (String reservedName: new String[] {"con", "prn", "aux", "nul", "com1", "com9", "lpt1", "lpt9"}) {
file = handler.getUniqueFilenameForClass("L" + reservedName + ";");
checkFilename(tempDir, file, reservedName +".smali");
}
}
private void checkFilename(File base, File file, String... elements) {
for (int i=elements.length-1; i>=0; i--) {
Assert.assertEquals(elements[i], file.getName());
file = file.getParentFile();
}
Assert.assertEquals(base.getAbsolutePath(), file.getAbsolutePath());
}
}