MultipleProviderRuleTest.java

package de.zalando.toga.provider;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Rule;
import org.junit.Test;

import java.io.File;
import java.util.HashMap;
import java.util.Map;

import static java.util.regex.Pattern.compile;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

public class MultipleProviderRuleTest {

    @Rule
    public ExampleProviderRule version1 = new ExampleProviderRule(new File("src/test/resources/provider"), compile("E1-ServiceB-1"));

    @Rule
    public ExampleProviderRule version2 = new ExampleProviderRule(new File("src/test/resources/provider"), compile("E1-ServiceB-2"));

    private static Map<String, Integer> counts = new HashMap<>();

    @BeforeClass
    public static void setup() {
        counts.clear();
    }

    @Test
    public void shouldIterate() {
        addToCounts(version1.getExampleJson());
        addToCounts(version2.getExampleJson());
    }

    private void addToCounts(String example) {
        Integer count = counts.containsKey(example) ? counts.get(example) : 0;
        counts.put(example, count + 1);
    }

    @AfterClass
    public static void countResults() {
        int sum = counts.values().stream().mapToInt(Integer::intValue).sum();
        // 3 * version 1 + 1 * each example from version 2
        assertThat(sum, is(6));
    }
}