GeneratorTest.java

package de.zalando.toga.generator;

import com.fasterxml.jackson.databind.ObjectMapper;
import de.zalando.toga.generator.scenarios.EmptyObject;
import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.util.List;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;

public class GeneratorTest {

    /**
     * Testmap
     *
     * - temp file already exists, should be overwritten
     */

    @Test
    public void emptyObject() throws IOException {
        verifyFile("empty_object", EmptyObject.class);
    }

    @Test(expected = NullPointerException.class)
    public void targetFileMayNotBeNUll() {
        new Generator().generate(null);
    }

    @Test(expected = IllegalArgumentException.class)
    public void targetFileMayNotBeADirectory() {
        new Generator().generate(new File("src/test/resources/generator/"));
    }


    static void verifyFile(String scenario, Class clazz) throws IOException {

        File reference = new File("src/test/resources/generator/", scenario + "_ref.json");

        File output = generateOutput(scenario);

        ObjectMapper mapper = new ObjectMapper();
        List referenceObjects = mapper.readValue(reference, mapper.getTypeFactory().constructCollectionType(List.class, clazz));
        List generatedObjects = mapper.readValue(output, mapper.getTypeFactory().constructCollectionType(List.class, clazz));

        for (Object referenceObject : referenceObjects) {
            assertThat("Expected: [" + referenceObject + "]", generatedObjects.contains(referenceObject), is(true));
        }

        for (Object generated : generatedObjects) {
            assertThat("Expected: [" + generated + "]", referenceObjects.contains(generated), is(true));
        }
    }

    static File generateOutput(String scenario) {
        File input = new File("src/test/resources/generator/", scenario + "_in.json");
        File output = new File("src/test/resources/generator/", scenario + "_out.json");
        Generator generator = new Generator();
        generator.load(input);
        generator.generate(output);
        return output;
    }

}