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/**

 * @test

 * @bug 5015163 7172553

 * @summary tests StringJoinerTest

 * @run testng StringJoinerTest

 * @author Jim Gish

 */

import java.util.ArrayList;

import java.util.StringJoiner;

import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

@Test(groups = {"unit","string","util","libs"})

public class StringJoinerTest {

    private static final String EMPTY = "EMPTY";

    private static final String ONE = "One";

    private static final int ONE_LEN = ONE.length();

    private static final String TWO = "Two";

    private static final int TWO_LEN = TWO.length();

    private static final String THREE = "Three";

    private static final String FOUR = "Four";

    private static final String FIVE = "Five";

    private static final String DASH = "-";

    public void addAddAll() {

        StringJoiner sj = new StringJoiner(DASH, "{", "}");

        sj.add(ONE);

        ArrayList<String> nextOne = new ArrayList<>();

        nextOne.add(TWO);

        nextOne.add(THREE);

        nextOne.stream().forEachOrdered(sj::add);

        String expected = "{"+ONE+DASH+TWO+DASH+THREE+"}";

        assertEquals(sj.toString(), expected);

    }

    void addAlladd() {

        StringJoiner sj = new StringJoiner(DASH, "{", "}");

        ArrayList<String> firstOne = new ArrayList<>();

        firstOne.add(ONE);

        firstOne.add(TWO);

        firstOne.stream().forEachOrdered(sj::add);

        sj.add(THREE);

        String expected = "{"+ONE+DASH+TWO+DASH+THREE+"}";

        assertEquals(sj.toString(), expected);

    }

    // The following tests do two successive adds of different types

    public void addAlladdAll() {

        StringJoiner sj = new StringJoiner(DASH, "{", "}");

        ArrayList<String> firstOne = new ArrayList<>();

        firstOne.add(ONE);

        firstOne.add(TWO);

        firstOne.add(THREE);

        firstOne.stream().forEachOrdered(sj::add);

        ArrayList<String> nextOne = new ArrayList<>();

        nextOne.add(FOUR);

        nextOne.add(FIVE);

        nextOne.stream().forEachOrdered(sj::add);

        String expected = "{"+ONE+DASH+TWO+DASH+THREE+DASH+FOUR+DASH+FIVE+"}";

        assertEquals(sj.toString(), expected);

    }

    public void addCharSequence() {

        StringJoiner sj = new StringJoiner(",");

        CharSequence cs_one = ONE;

        CharSequence cs_two = TWO;

        sj.add(cs_one);

        sj.add(cs_two);

        assertEquals(sj.toString(), ONE + "," + TWO);

        sj = new StringJoiner(DASH, "{", "}");

        sj.add(cs_one);

        sj.add(cs_two);

        assertEquals(sj.toString(), "{" + ONE + DASH + TWO + "}");

        StringBuilder builder = new StringBuilder(ONE);

        StringBuffer buffer = new StringBuffer(THREE);

        sj = new StringJoiner(", ", "{ ", " }");

        sj.add(builder).add(buffer);

        builder.append(TWO);

        buffer.append(FOUR);

        assertEquals(sj.toString(), "{ " + ONE + ", " + THREE + " }",

                "CharSequence is copied when add");

        sj.add(builder);

        assertEquals(sj.toString(), "{ " + ONE + ", " + THREE + ", " + ONE +

                TWO + " }");

    }

    public void addCharSequenceWithEmptyValue() {

        StringJoiner sj = new StringJoiner(",").setEmptyValue(EMPTY);

        CharSequence cs_one = ONE;

        CharSequence cs_two = TWO;

        sj.add(cs_one);

        sj.add(cs_two);

        assertEquals(sj.toString(), ONE + "," + TWO);

        sj = new StringJoiner(DASH, "{", "}");

        sj.add(cs_one);

        sj.add(cs_two);

        assertEquals(sj.toString(), "{" + ONE + DASH + TWO + "}");

        sj = new StringJoiner(DASH, "{", "}");

        assertEquals(sj.toString(), "{}");

        sj = new StringJoiner("=", "{", "}").setEmptyValue("");

        assertEquals(sj.toString(), "");

        sj = new StringJoiner(DASH, "{", "}").setEmptyValue(EMPTY);

        assertEquals(sj.toString(), EMPTY);

        sj.add(cs_one);

        sj.add(cs_two);

        assertEquals(sj.toString(), "{" + ONE + DASH + TWO + "}");

    }

    public void addString() {

        StringJoiner sj = new StringJoiner(DASH);

        sj.add(ONE);

        assertEquals(sj.toString(), ONE);

        sj = new StringJoiner(DASH, "{", "}");

        sj.add(ONE);

        assertEquals(sj.toString(), "{" + ONE + "}");

        sj.add(TWO);

        assertEquals(sj.toString(), "{" + ONE + DASH + TWO + "}");

    }

    public void lengthWithCustomEmptyValue() {

        StringJoiner sj = new StringJoiner(DASH, "<", ">").setEmptyValue(EMPTY);

        assertEquals(sj.length(), EMPTY.length());

        sj.add("");

        assertEquals(sj.length(), "<>".length());

        sj.add("");

        assertEquals(sj.length(), "<->".length());

        sj.add(ONE);

        assertEquals(sj.length(), 4 + ONE_LEN);

        assertEquals(sj.toString().length(), sj.length());

        sj.add(TWO);

        assertEquals(sj.length(), 5 + ONE_LEN + TWO_LEN);

        assertEquals(sj.toString().length(), sj.length());

        sj = new StringJoiner("||", "<", "-->");

        assertEquals(sj.length(), 4);

        assertEquals(sj.toString().length(), sj.length());

        sj.add("abcdef");

        assertEquals(sj.length(), 10);

        assertEquals(sj.toString().length(), sj.length());

        sj.add("xyz");

        assertEquals(sj.length(), 15);

        assertEquals(sj.toString().length(), sj.length());

    }

    public void noAddAndEmptyValue() {

        StringJoiner sj = new StringJoiner(DASH, "", "").setEmptyValue(EMPTY);

        assertEquals(sj.toString(), EMPTY);

        sj = new StringJoiner(DASH, "<..", "");

        assertEquals(sj.toString(), "<..");

        sj = new StringJoiner(DASH, "<..", "");

        assertEquals(sj.toString(), "<..");

        sj = new StringJoiner(DASH, "", "==>");

        assertEquals(sj.toString(), "==>");

        sj = new StringJoiner(DASH, "{", "}");

        assertEquals(sj.toString(), "{}");

    }

    @Test(expectedExceptions = {NullPointerException.class})

    public void setEmptyValueNull() {

        new StringJoiner(DASH, "{", "}").setEmptyValue(null);

    }

    @Test(expectedExceptions = {NullPointerException.class})

    public void setDelimiterNull() {

        new StringJoiner(null);

    }

    @Test(expectedExceptions = {NullPointerException.class})

    public void setPrefixNull() {

        new StringJoiner(DASH, null, "}");

    }

    @Test(expectedExceptions = {NullPointerException.class})

    public void setSuffixNull() {

        new StringJoiner(DASH, "{", null);

    }

    public void stringFromtoString() {

        StringJoiner sj = new StringJoiner(", ");

        assertEquals(sj.toString(), "");

        sj = new StringJoiner(",", "{", "}");

        assertEquals(sj.toString(), "{}");

        sj = new StringJoiner(",");

        sj.add(ONE);

        assertEquals(sj.toString(), ONE);

        sj.add(TWO);

        assertEquals(sj.toString(), ONE + "," + TWO);

        sj = new StringJoiner(",", "{--", "--}");

        sj.add(ONE);

        sj.add(TWO);

        assertEquals(sj.toString(), "{--" + ONE + "," + TWO + "--}");

    }

    public void stringFromtoStringWithEmptyValue() {

        StringJoiner sj = new StringJoiner(" ", "", "");

        assertEquals(sj.toString(), "");

        sj = new StringJoiner(", ");

        assertEquals(sj.toString(), "");

        sj = new StringJoiner(",", "{", "}");

        assertEquals(sj.toString(), "{}");

        sj = new StringJoiner(",", "{", "}").setEmptyValue("");

        assertEquals(sj.toString(), "");

        sj = new StringJoiner(",");

        sj.add(ONE);

        assertEquals(sj.toString(), ONE);

        sj.add(TWO);

        assertEquals(sj.toString(), ONE + "," + TWO);

        sj = new StringJoiner(",", "{--", "--}");

        sj.add(ONE);

        assertEquals(sj.toString(), "{--" + ONE + "--}" );

        sj.add(TWO);

        assertEquals(sj.toString(), "{--" + ONE + "," + TWO + "--}");

    }

    public void toStringWithCustomEmptyValue() {

        StringJoiner sj = new StringJoiner(DASH, "<", ">").setEmptyValue(EMPTY);

        assertEquals(sj.toString(), EMPTY);

        sj.add("");

        assertEquals(sj.toString(), "<>");

        sj.add("");

        assertEquals(sj.toString(), "<->");

    }

    private void testCombos(String infix, String prefix, String suffix) {

        StringJoiner sj = new StringJoiner(infix, prefix, suffix);

        assertEquals(sj.toString(), prefix + suffix);

        assertEquals(sj.toString().length(), sj.length());

        // EmptyValue

        sj = new StringJoiner(infix, prefix, suffix).setEmptyValue("<NONE>");

        assertEquals(sj.toString(), "<NONE>");

        assertEquals(sj.toString().length(), sj.length());

        // empty in front

        sj.add("");

        assertEquals(sj.toString(), prefix + suffix);

        // empty in middle

        sj.add("");

        assertEquals(sj.toString(), prefix + infix + suffix);

        sj.add("1");

        assertEquals(sj.toString(), prefix + infix + infix + "1" + suffix);

        // empty at end

        sj.add("");

        assertEquals(sj.toString(), prefix + infix + infix + "1" + infix + suffix);

        sj = new StringJoiner(infix, prefix, suffix).setEmptyValue("<NONE>");

        sj.add("1");

        assertEquals(sj.toString(), prefix + "1" + suffix);

        sj.add("2");

        assertEquals(sj.toString(), prefix + "1" + infix + "2" + suffix);

        sj.add("");

        sj.add("3");

    }

    public void testDelimiterCombinations() {

        testCombos("", "", "");

        testCombos("", "<", "");

        testCombos("", "", ">");

        testCombos("", "<", ">");

        testCombos(",", "", "");

        testCombos(",", "<", "");

        testCombos(",", "", ">");

        testCombos(",", "<", ">");

    }

}