src/test/java/junitparams/ParamsInAnnotationTest.java

package junitparams;

import java.math.BigDecimal;

import org.junit.Test;
import org.junit.runner.RunWith;

import static org.assertj.core.api.Assertions.*;

@RunWith(JUnitParamsRunner.class)
public class ParamsInAnnotationTest {

    @Test
    @Parameters({"1", "2"})
    public void singleParam(int number) {
        assertThat(number).isGreaterThan(0);
    }

    @Test
    @Parameters({"1, true", "2, false"})
    public void multipleParamsCommaSeparated(int number, boolean isOne) throws Exception {
        if (isOne)
            assertThat(number).isEqualTo(1);
        else
            assertThat(number).isNotEqualTo(1);
    }

    @Test
    @Parameters({"1 | true", "2 | false"})
    public void multipleParamsPipeSeparated(int number, boolean isOne) throws Exception {
        if (isOne)
            assertThat(number).isEqualTo(1);
        else
            assertThat(number).isNotEqualTo(1);
    }

    @Test
    @Parameters({"a \n b", "a(asdf)", "a \r a"})
    public void specialCharsInParam(String a) throws Exception {
        assertThat(a).isIn("a \n b", "a(asdf)", "a \r a");
    }

    @Test
    @Parameters({",1"})
    public void emptyFirstParam(String empty, int number) {
        assertThat(empty).isEmpty();
        assertThat(number).isEqualTo(1);
    }

    @Test
    @Parameters({"1,"})
    public void emptyLastParam(int number, String empty) {
        assertThat(empty).isEmpty();
        assertThat(number).isEqualTo(1);
    }

    @Test
    @Parameters({"1,,1"})
    public void emptyMiddleParam(int number1, String empty, int number2) {
        assertThat(empty).isEmpty();
        assertThat(number1).isEqualTo(1);
        assertThat(number2).isEqualTo(1);
    }

    @Test
    @Parameters({","})
    public void allParamsEmpty(String empty1, String empty2) {
        assertThat(empty1).isEmpty();
        assertThat(empty2).isEmpty();
    }

    @Test
    @Parameters({
            "1, 1, 1",
            "1.1, 1.1, 2",
            "11, 11, 2",
            "1.11, 1.11, 3"
    })
    public void convertToBigDecimal(BigDecimal number, String string, int precision) {
        assertThat(number).isEqualByComparingTo(string);
        assertThat(number.precision()).isEqualTo(precision);
    }

    @Test(expected = IllegalArgumentException.class)
    @Parameters({" invalidNumber "})
    public void cannotConvertToBigDecimalForInvalidInput(BigDecimal number) {
    }
}