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package joptsimple.examples;
import com.google.common.base.Joiner;
import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;
import org.junit.Test;
import java.io.File;
import java.util.List;
import java.util.Map.Entry;
import java.util.Properties;
import static org.junit.Assert.assertEquals;
public class ExportOptionsTest {
private static Properties asProperties( OptionSet options, String prefix ) {
Properties properties = new Properties();
for ( Entry<OptionSpec<?>, List<?>> entry : options.asMap().entrySet() ) {
OptionSpec<?> spec = entry.getKey();
properties.setProperty(
asPropertyKey( prefix, spec ),
asPropertyValue( entry.getValue(), options.has( spec ) ) );
}
return properties;
}
private static String asPropertyKey( String prefix, OptionSpec<?> spec ) {
List<String> flags = spec.options();
for ( String flag : flags )
if ( 1 < flag.length() )
return null == prefix ? flag : ( prefix + '.' + flag );
throw new IllegalArgumentException( "No usable non-short flag: " + flags );
}
private static String asPropertyValue( List<?> values, boolean present ) {
// Simple flags have no values; treat presence/absence as true/false
return values.isEmpty() ? String.valueOf( present ) : Joiner.on( "," ).join( values );
}
@Test
public void allowsExportOfOptions() {
Properties expected = new Properties();
expected.setProperty( "rice.count", "3" );
// Cannot check path as string directly - Windows flips the leading slash
expected.setProperty( "rice.output-dir", new File( "/tmp" ).toString() );
expected.setProperty( "rice.fun", "false" );
expected.setProperty( "rice.verbose", "true" );
OptionParser parser = new OptionParser();
OptionSpec<Integer> count = parser.accepts( "count" ).withRequiredArg().ofType( Integer.class );
OptionSpec<File> outputDir = parser.accepts( "output-dir" ).withOptionalArg().ofType( File.class );
OptionSpec<Void> verbose = parser.accepts( "verbose" );
OptionSpec<Void> fun = parser.accepts( "fun" );
OptionSpec<File> files = parser.nonOptions().ofType( File.class );
OptionSet options = parser.parse( "--count", "3", "--output-dir", "/tmp", "--verbose", "a.txt", "b.txt" );
assertEquals( expected, asProperties( options, "rice" ) );
}
}
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