hamcrest-json-matchers

Hamcrest Matchers for matching

• JSON Strings
• GSON JsonObjects
• Vert.x JsonObjects
• json.org JSONObjects

Installation

Maven

<repositories>
    <repository>
        <id>ossrh</id>
        <url>https://oss.sonatype.org/content/repositories/snapshots</url>
        <snapshots>
            <enabled>true</enabled>
            <updatePolicy>always</updatePolicy>
        </snapshots>
    </repository>
</repositories>

<dependency>
    <groupId>de.crunc</groupId>
    <artifactId>hamcrest-json-matchers</artifactId>
    <version>0.2-SNAPSHOT</version>
    <scope>test</scope>
</dependency>

Usage

JSON strings

    import org.junit.Test;

    import static de.crunc.hamcrest.json.JsonMatchers.isJsonArray;
    import static de.crunc.hamcrest.json.JsonMatchers.isJsonObject;
    import static org.hamcrest.MatcherAssert.assertThat;

    // ...

    @Test
    public void testString() {

        String json = "{\"someObject\":{\"foo\":31},\"someArray\":[1,2,3]}";

        assertThat(json, isJsonObject()
                .prop("someObject", isJsonObject()
                        .prop("foo", 31))
                .prop("someArray", isJsonArray()
                        .item(1)
                        .item(2)
                        .item(3)));
    }

GSON

    import org.junit.Test;

    import static de.crunc.hamcrest.json.JsonMatchers.isJsonArray;
    import static de.crunc.hamcrest.json.JsonMatchers.isJsonObject;
    import static org.hamcrest.MatcherAssert.assertThat;

    // ...

    @Test
    public void testGson() {

        com.google.gson.JsonObject someObject = new com.google.gson.JsonObject();
        someObject.add("foo", new com.google.gson.JsonPrimitive(31));

        com.google.gson.JsonArray someArray = new com.google.gson.JsonArray();
        someArray.add(new com.google.gson.JsonPrimitive(1));
        someArray.add(new com.google.gson.JsonPrimitive(2));
        someArray.add(new com.google.gson.JsonPrimitive(3));

        com.google.gson.JsonObject json = new com.google.gson.JsonObject();
        json.add("someObject", someObject);
        json.add("someArray", someArray);

        assertThat(json, isJsonObject()
                .prop("someObject", isJsonObject()
                        .prop("foo", 31))
                .prop("someArray", isJsonArray()
                        .item(1)
                        .item(2)
                        .item(3)));
    }

Vert.x

    import org.junit.Test;

    import static de.crunc.hamcrest.json.JsonMatchers.isJsonArray;
    import static de.crunc.hamcrest.json.JsonMatchers.isJsonObject;
    import static org.hamcrest.MatcherAssert.assertThat;

    // ...

    @Test
    public void testVertx() {

        io.vertx.core.json.JsonObject someObject = new io.vertx.core.json.JsonObject();
        someObject.putNumber("foo", 31);

        io.vertx.core.json.JsonArray someArray = new io.vertx.core.json.JsonArray();
        someArray.addNumber(1);
        someArray.addNumber(2);
        someArray.addNumber(3);

        io.vertx.core.json.JsonObject json = new io.vertx.core.json.JsonObject();
        json.putObject("someObject", someObject);
        json.putArray("someArray", someArray);

        assertThat(json, isJsonObject()
                .prop("someObject", isJsonObject()
                        .prop("foo", 31))
                .prop("someArray", isJsonArray()
                        .item(1)
                        .item(2)
                        .item(3)));
    }

json.org

    import org.junit.Test;

    import static de.crunc.hamcrest.json.JsonMatchers.isJsonArray;
    import static de.crunc.hamcrest.json.JsonMatchers.isJsonObject;
    import static org.hamcrest.MatcherAssert.assertThat;

    // ...

    @Test
    public void testJsonOrg() {

        org.json.JSONObject someObject = new org.json.JSONObject()
                .put("foo", 31);

        org.json.JSONArray someArray = new org.json.JSONArray();
        someArray.put(1);
        someArray.put(2);
        someArray.put(3);

        org.json.JSONObject json = new org.json.JSONObject()
                .put("someObject", someObject)
                .put("someArray", someArray);

        assertThat(json, isJsonObject()
                .prop("someObject", isJsonObject()
                        .prop("foo", 31))
                .prop("someArray", isJsonArray()
                        .item(1)
                        .item(2)
                        .item(3)));
    }

Compatibility

Tested with all combinations of the following versions

GSON

• 2.3.1
• 2.3
• 2.2.4
• 2.2.3
• 2.2.2
• 2.2.1
• 2.2
• 2.1
• 2.0

Vert.x

• 2.1.5
• 2.1.4
• 2.1.3
• 2.1.2
• 2.1.1
• 2.1
• 2.0.2-final
• 2.0.1-final
• 2.0.0-final

json.org

• 20141113
• 20140107
• 20131018
• 20090211
• 20080701
• 20070829