/**

 * Back 2 Browser Bytecode Translator

 * Copyright (C) 2012 Jaroslav Tulach <jaroslav.tulach@apidesign.org>

 *

 * This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation, version 2 of the License.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. Look for COPYING file in the top folder.

 * If not, see http://opensource.org/licenses/GPL-2.0.

 */

package org.apidesign.vm4brwsr;

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.DataInputStream;

import java.io.DataOutputStream;

import java.io.IOException;

import javax.script.Invocable;

import javax.script.ScriptException;

import static org.testng.Assert.*;

import org.testng.annotations.BeforeClass;

import org.testng.annotations.Test;

/**

 *

 * @author Jaroslav Tulach <jtulach@netbeans.org>

 */

public class NumberTest {

    @Test public void integerFromString() throws Exception {

        assertExec("Can convert string to integer", "java_lang_Integer_parseIntILjava_lang_String",

            Double.valueOf(333), "333"

        );

    }

    @Test public void doubleFromString() throws Exception {

        assertExec("Can convert string to double", "java_lang_Double_parseDoubleDLjava_lang_String",

            Double.valueOf(33.3), "33.3"

        );

    }

    @Test public void autoboxDouble() throws Exception {

        assertExec("Autoboxing of doubles is OK", "org_apidesign_vm4brwsr_Numbers_autoboxDblToStringLjava_lang_String",

            "3.3"

        );

    }

    @Test public void javalog1000() throws Exception {

        assertEquals(3.0, Math.log10(1000.0), 0.00003, "log_10(1000) == 3");

    }

    @Test public void jslog1000() throws Exception {

        assertExec("log_10(1000) == 3", "java_lang_Math_log10DD", 

            Double.valueOf(3.0), 1000.0

        );

    }

    @Test public void javaRem() {

        assertEquals(3, Numbers.rem(303, 10));

    }

    @Test public void jsRem() throws Exception {

        assertExec("Should be three", "org_apidesign_vm4brwsr_Numbers_remIII", 

            Double.valueOf(3.0), 303, 10

        );

    }

    @Test public void deserializeInt() throws Exception {

        int exp = Numbers.deserInt();

        assertExec("Should be the same", "org_apidesign_vm4brwsr_Numbers_deserIntI", 

            Double.valueOf(exp)

        );

    }

    @Test public void deserializeSimpleLong() throws Exception {

        assertExec("Should be 3454", "org_apidesign_vm4brwsr_Numbers_deserLongJAB", 

            Double.valueOf(3454), 

            new byte[] { (byte)0, (byte)0, (byte)0, (byte)0, (byte)0, (byte)0, (byte)13, (byte)126 }

        );

    }

    /* XXX: JavaScript cannot represent as big longs as Java. 

    @Test public void deserializeLargeLong() throws Exception {

        final byte[] arr = new byte[] {

            (byte)64, (byte)8, (byte)0, (byte)0, (byte)0, (byte)0, (byte)0, (byte)0

        };

        long exp = Numbers.deserLong(arr);

        assertExec("Should be " + exp, "org_apidesign_vm4brwsr_Numbers_deserLongJAB", 

            Double.valueOf(exp), arr);

    }

    */

    @Test public void deserializeFloatInJava() throws Exception {

        float f = 54324.32423f;

        float r = Numbers.deserFloat();

        assertEquals(r, f, "Floats are the same");

    }

    @Test public void deserializeFloatInJS() throws Exception {

        float f = 54324.32423f;

        assertExec("Should be the same", "org_apidesign_vm4brwsr_Numbers_deserFloatF", 

            Double.valueOf(f)

        );

    }

    @Test public void deserializeDoubleInJava() throws Exception {

        double f = 3.0;

        double r = Numbers.deserDouble();

        assertEquals(r, f, 0.001, "Doubles are the same");

    }

    @Test public void deserializeDoubleInJS() throws Exception {

        double f = 3.0;

        assertExec("Should be the same", "org_apidesign_vm4brwsr_Numbers_deserDoubleD", f);

    }

    /*

    @Test public void serDouble() throws IOException {

        double f = 3.0;

        ByteArrayOutputStream os = new ByteArrayOutputStream();

        DataOutputStream d = new DataOutputStream(os);

        d.writeLong(3454);

        d.close();

        StringBuilder sb = new StringBuilder();

        byte[] arr = os.toByteArray();

        for (int i = 0; i < arr.length; i++) {

            sb.append("(byte)").append(arr[i]).append(", ");

        }

        fail("" + sb);

    }

*/    

    @Test public void fiveInStringJS() throws Exception {

        String s = Numbers.intToString();

        assertExec("Should be the same: " + s, 

            "org_apidesign_vm4brwsr_Numbers_intToStringLjava_lang_String", 

            s

        );

    }

    private static CharSequence codeSeq;

    private static Invocable code;

    @BeforeClass

    public void compileTheCode() throws Exception {

        if (codeSeq == null) {

            StringBuilder sb = new StringBuilder();

            code = StaticMethodTest.compileClass(sb, "org/apidesign/vm4brwsr/Numbers");

            codeSeq = sb;

        }

    }

    private static void assertExec(

        String msg, String methodName, Object expRes, Object... args) throws Exception {

        Object ret = null;

        try {

            ret = code.invokeFunction(methodName, args);

        } catch (ScriptException ex) {

            fail("Execution failed in\n" + codeSeq, ex);

        } catch (NoSuchMethodException ex) {

            fail("Cannot find method in\n" + codeSeq, ex);

        }

        if (ret == null && expRes == null) {

            return;

        }

        if (expRes.equals(ret)) {

            return;

        }

        if (expRes instanceof Double && ret instanceof Double) {

            double expD = ((Double)expRes).doubleValue();

            double retD = ((Double)ret).doubleValue();

            assertEquals(retD, expD, 0.000004, msg + " was " + ret + "\n" + codeSeq);

            return;

        }

        assertEquals(ret, expRes, msg + "was: " + ret + "\n" + codeSeq);

    }

}