RegexpLiteralTest.java

package org.dynjs.runtime;

import static org.fest.assertions.Assertions.*;

import org.dynjs.runtime.builtins.types.regexp.DynRegExp;
import org.junit.Ignore;
import org.junit.Test;

public class RegexpLiteralTest extends AbstractDynJSTestSupport {

    @Test
    public void testLiteralNoFlags() {
        Object result = eval("/foo/");
        assertThat(result).isInstanceOf(DynRegExp.class);

        DynRegExp regExp = (DynRegExp) result;
        assertThat(getPropertyValue(regExp, "source")).isEqualTo("foo");
        assertThat(getPropertyValue(regExp, "global")).isEqualTo(false);
        assertThat(getPropertyValue(regExp, "ignoreCase")).isEqualTo(false);
        assertThat(getPropertyValue(regExp, "multiline")).isEqualTo(false);
        assertThat(getPropertyValue(regExp, "lastIndex")).isEqualTo(0L);
    }

    @Test
    public void testLiteralWithFlags() {
        Object result = eval("/foo/mg");
        assertThat(result).isInstanceOf(DynRegExp.class);

        DynRegExp regExp = (DynRegExp) result;
        assertThat(getPropertyValue(regExp, "source")).isEqualTo("foo");
        assertThat(getPropertyValue(regExp, "global")).isEqualTo(true);
        assertThat(getPropertyValue(regExp, "ignoreCase")).isEqualTo(false);
        assertThat(getPropertyValue(regExp, "multiline")).isEqualTo(true);
        assertThat(getPropertyValue(regExp, "lastIndex")).isEqualTo(0L);
    }

    @Test
    public void testExecWithGlobalFlag() {
        eval("var r = /foo./g", "var s = 'footfool';");

        JSObject result = (JSObject) eval("r.exec(s)");

        assertThat(result).isNotNull();
        assertThat(result.get(getContext(), "length")).isEqualTo(1L);
        assertThat(result.get(getContext(), "0")).isEqualTo("foot");

        result = (JSObject) eval("r.exec(s)");
        assertThat(result.get(getContext(), "length")).isEqualTo(1L);
        assertThat(result.get(getContext(), "0")).isEqualTo("fool");
    }

    @Test
    public void testExecWithMultilineFlag() {
        eval("var r = /foo./mg", "var s = 'afoot\\nafool';");

        JSObject result = (JSObject) eval("r.exec(s)");

        assertThat(result).isNotNull();
        assertThat(result.get(getContext(), "length")).isEqualTo(1L);
        assertThat(result.get(getContext(), "0")).isEqualTo("foot");

        result = (JSObject) eval("r.exec(s)");
        assertThat(result.get(getContext(), "length")).isEqualTo(1L);
        assertThat(result.get(getContext(), "0")).isEqualTo("fool");
    }
    
    @Test
    public void testProblematicRegexpWithEscapedCharRanges() {
        eval( "/^[$A-Za-z_\\x7f-\\uffff][$\\w\\x7f-\\uffff]*$/");
    }
    
    @Test
    public void testProblematicRegexpWithEscapedCharRangesInCtor() {
        eval( "new RegExp('^[$A-Za-z_\\x7f-\\uffff][$\\w\\x7f-\\uffff]*$')");
    }
    
    @Ignore
    @Test
    public void testEmptyCharacterClassRange() {
        System.err.println( eval( "/[]/.exec('taco')" ) );
    }
    
    private Object getPropertyValue(JSObject object, String name) {
        return ((PropertyDescriptor) object.getOwnProperty(null, name))
                .getValue();
    }
}