Java tutorial
package com.fasterxml.jackson.databind; import java.io.*; import java.util.Arrays; import junit.framework.TestCase; import com.fasterxml.jackson.core.*; //import static org.junit.Assert.*; public abstract class BaseTest extends TestCase { /* /********************************************************** /* Some sample documents: /********************************************************** */ protected final static int SAMPLE_SPEC_VALUE_WIDTH = 800; protected final static int SAMPLE_SPEC_VALUE_HEIGHT = 600; protected final static String SAMPLE_SPEC_VALUE_TITLE = "View from 15th Floor"; protected final static String SAMPLE_SPEC_VALUE_TN_URL = "http://www.example.com/image/481989943"; protected final static int SAMPLE_SPEC_VALUE_TN_HEIGHT = 125; protected final static String SAMPLE_SPEC_VALUE_TN_WIDTH = "100"; protected final static int SAMPLE_SPEC_VALUE_TN_ID1 = 116; protected final static int SAMPLE_SPEC_VALUE_TN_ID2 = 943; protected final static int SAMPLE_SPEC_VALUE_TN_ID3 = 234; protected final static int SAMPLE_SPEC_VALUE_TN_ID4 = 38793; protected final static String SAMPLE_DOC_JSON_SPEC = "{\n" + " \"Image\" : {\n" + " \"Width\" : " + SAMPLE_SPEC_VALUE_WIDTH + ",\n" + " \"Height\" : " + SAMPLE_SPEC_VALUE_HEIGHT + "," + "\"Title\" : \"" + SAMPLE_SPEC_VALUE_TITLE + "\",\n" + " \"Thumbnail\" : {\n" + " \"Url\" : \"" + SAMPLE_SPEC_VALUE_TN_URL + "\",\n" + "\"Height\" : " + SAMPLE_SPEC_VALUE_TN_HEIGHT + ",\n" + " \"Width\" : \"" + SAMPLE_SPEC_VALUE_TN_WIDTH + "\"\n" + " },\n" + " \"IDs\" : [" + SAMPLE_SPEC_VALUE_TN_ID1 + "," + SAMPLE_SPEC_VALUE_TN_ID2 + "," + SAMPLE_SPEC_VALUE_TN_ID3 + "," + SAMPLE_SPEC_VALUE_TN_ID4 + "]\n" + " }" + "}"; /* /********************************************************** /* Helper classes (beans) /********************************************************** */ /** * Sample class from Jackson tutorial ("JacksonInFiveMinutes") */ protected static class FiveMinuteUser { public enum Gender { MALE, FEMALE }; public static class Name { private String _first, _last; public Name() { } public Name(String f, String l) { _first = f; _last = l; } public String getFirst() { return _first; } public String getLast() { return _last; } public void setFirst(String s) { _first = s; } public void setLast(String s) { _last = s; } @Override public boolean equals(Object o) { if (o == this) return true; if (o == null || o.getClass() != getClass()) return false; Name other = (Name) o; return _first.equals(other._first) && _last.equals(other._last); } } private Gender _gender; private Name _name; private boolean _isVerified; private byte[] _userImage; public FiveMinuteUser() { } public FiveMinuteUser(String first, String last, boolean verified, Gender g, byte[] data) { _name = new Name(first, last); _isVerified = verified; _gender = g; _userImage = data; } public Name getName() { return _name; } public boolean isVerified() { return _isVerified; } public Gender getGender() { return _gender; } public byte[] getUserImage() { return _userImage; } public void setName(Name n) { _name = n; } public void setVerified(boolean b) { _isVerified = b; } public void setGender(Gender g) { _gender = g; } public void setUserImage(byte[] b) { _userImage = b; } @Override public boolean equals(Object o) { if (o == this) return true; if (o == null || o.getClass() != getClass()) return false; FiveMinuteUser other = (FiveMinuteUser) o; if (_isVerified != other._isVerified) return false; if (_gender != other._gender) return false; if (!_name.equals(other._name)) return false; byte[] otherImage = other._userImage; if (otherImage.length != _userImage.length) return false; for (int i = 0, len = _userImage.length; i < len; ++i) { if (_userImage[i] != otherImage[i]) { return false; } } return true; } } /* /********************************************************** /* High-level helpers /********************************************************** */ protected void verifyJsonSpecSampleDoc(JsonParser jp, boolean verifyContents) throws IOException { verifyJsonSpecSampleDoc(jp, verifyContents, true); } protected void verifyJsonSpecSampleDoc(JsonParser jp, boolean verifyContents, boolean requireNumbers) throws IOException { if (!jp.hasCurrentToken()) { jp.nextToken(); } assertToken(JsonToken.START_OBJECT, jp.getCurrentToken()); // main object assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Image' if (verifyContents) { verifyFieldName(jp, "Image"); } assertToken(JsonToken.START_OBJECT, jp.nextToken()); // 'image' object assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Width' if (verifyContents) { verifyFieldName(jp, "Width"); } verifyIntToken(jp.nextToken(), requireNumbers); if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_WIDTH); } assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Height' if (verifyContents) { verifyFieldName(jp, "Height"); } verifyIntToken(jp.nextToken(), requireNumbers); if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_HEIGHT); } assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Title' if (verifyContents) { verifyFieldName(jp, "Title"); } assertToken(JsonToken.VALUE_STRING, jp.nextToken()); assertEquals(SAMPLE_SPEC_VALUE_TITLE, getAndVerifyText(jp)); assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Thumbnail' if (verifyContents) { verifyFieldName(jp, "Thumbnail"); } assertToken(JsonToken.START_OBJECT, jp.nextToken()); // 'thumbnail' object assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Url' if (verifyContents) { verifyFieldName(jp, "Url"); } assertToken(JsonToken.VALUE_STRING, jp.nextToken()); if (verifyContents) { assertEquals(SAMPLE_SPEC_VALUE_TN_URL, getAndVerifyText(jp)); } assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Height' if (verifyContents) { verifyFieldName(jp, "Height"); } verifyIntToken(jp.nextToken(), requireNumbers); if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_TN_HEIGHT); } assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'Width' if (verifyContents) { verifyFieldName(jp, "Width"); } // Width value is actually a String in the example assertToken(JsonToken.VALUE_STRING, jp.nextToken()); if (verifyContents) { assertEquals(SAMPLE_SPEC_VALUE_TN_WIDTH, getAndVerifyText(jp)); } assertToken(JsonToken.END_OBJECT, jp.nextToken()); // 'thumbnail' object assertToken(JsonToken.FIELD_NAME, jp.nextToken()); // 'IDs' assertToken(JsonToken.START_ARRAY, jp.nextToken()); // 'ids' array verifyIntToken(jp.nextToken(), requireNumbers); // ids[0] if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_TN_ID1); } verifyIntToken(jp.nextToken(), requireNumbers); // ids[1] if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_TN_ID2); } verifyIntToken(jp.nextToken(), requireNumbers); // ids[2] if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_TN_ID3); } verifyIntToken(jp.nextToken(), requireNumbers); // ids[3] if (verifyContents) { verifyIntValue(jp, SAMPLE_SPEC_VALUE_TN_ID4); } assertToken(JsonToken.END_ARRAY, jp.nextToken()); // 'ids' array assertToken(JsonToken.END_OBJECT, jp.nextToken()); // 'image' object assertToken(JsonToken.END_OBJECT, jp.nextToken()); // main object } private void verifyIntToken(JsonToken t, boolean requireNumbers) { if (t == JsonToken.VALUE_NUMBER_INT) { return; } if (requireNumbers) { // to get error assertToken(JsonToken.VALUE_NUMBER_INT, t); } // if not number, must be String if (t != JsonToken.VALUE_STRING) { fail("Expected INT or STRING value, got " + t); } } protected void verifyFieldName(JsonParser jp, String expName) throws IOException { assertEquals(expName, jp.getText()); assertEquals(expName, jp.getCurrentName()); } protected void verifyIntValue(JsonParser jp, long expValue) throws IOException { // First, via textual assertEquals(String.valueOf(expValue), jp.getText()); } /** * Method that checks whether Unit tests appear to run from Ant build * scripts. * * @since 1.6 */ protected static boolean runsFromAnt() { return "true".equals(System.getProperty("FROM_ANT")); } /* /********************************************************** /* Parser/generator construction /********************************************************** */ protected JsonParser createParserUsingReader(String input) throws IOException, JsonParseException { return createParserUsingReader(new JsonFactory(), input); } protected JsonParser createParserUsingReader(JsonFactory f, String input) throws IOException, JsonParseException { return f.createParser(new StringReader(input)); } protected JsonParser createParserUsingStream(String input, String encoding) throws IOException, JsonParseException { return createParserUsingStream(new JsonFactory(), input, encoding); } protected JsonParser createParserUsingStream(JsonFactory f, String input, String encoding) throws IOException, JsonParseException { /* 23-Apr-2008, tatus: UTF-32 is not supported by JDK, have to * use our own codec too (which is not optimal since there's * a chance both encoder and decoder might have bugs, but ones * that cancel each other out or such) */ byte[] data; if (encoding.equalsIgnoreCase("UTF-32")) { data = encodeInUTF32BE(input); } else { data = input.getBytes(encoding); } InputStream is = new ByteArrayInputStream(data); return f.createParser(is); } /* /********************************************************** /* Additional assertion methods /********************************************************** */ protected void assertToken(JsonToken expToken, JsonToken actToken) { if (actToken != expToken) { fail("Expected token " + expToken + ", current token " + actToken); } } protected void assertToken(JsonToken expToken, JsonParser jp) { assertToken(expToken, jp.getCurrentToken()); } protected void assertType(Object ob, Class<?> expType) { if (ob == null) { fail("Expected an object of type " + expType.getName() + ", got null"); } Class<?> cls = ob.getClass(); if (!expType.isAssignableFrom(cls)) { fail("Expected type " + expType.getName() + ", got " + cls.getName()); } } protected void assertValidLocation(JsonLocation location) { assertNotNull("Should have non-null location", location); assertTrue("Should have positive line number", location.getLineNr() > 0); } protected void verifyException(Throwable e, String... matches) { String msg = e.getMessage(); String lmsg = (msg == null) ? "" : msg.toLowerCase(); for (String match : matches) { String lmatch = match.toLowerCase(); if (lmsg.indexOf(lmatch) >= 0) { return; } } fail("Expected an exception with one of substrings (" + Arrays.asList(matches) + "): got one with message \"" + msg + "\""); } /** * Method that gets textual contents of the current token using * available methods, and ensures results are consistent, before * returning them */ protected String getAndVerifyText(JsonParser jp) throws IOException, JsonParseException { // Ok, let's verify other accessors int actLen = jp.getTextLength(); char[] ch = jp.getTextCharacters(); String str2 = new String(ch, jp.getTextOffset(), actLen); String str = jp.getText(); if (str.length() != actLen) { fail("Internal problem (jp.token == " + jp.getCurrentToken() + "): jp.getText().length() ['" + str + "'] == " + str.length() + "; jp.getTextLength() == " + actLen); } assertEquals("String access via getText(), getTextXxx() must be the same", str, str2); return str; } /* /********************************************************** /* And other helpers /********************************************************** */ protected byte[] encodeInUTF32BE(String input) { int len = input.length(); byte[] result = new byte[len * 4]; int ptr = 0; for (int i = 0; i < len; ++i, ptr += 4) { char c = input.charAt(i); result[ptr] = result[ptr + 1] = (byte) 0; result[ptr + 2] = (byte) (c >> 8); result[ptr + 3] = (byte) c; } return result; } public String quote(String str) { return '"' + str + '"'; } }