com.google.common.truth.StringSubject.java Source code

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Here is the source code for com.google.common.truth.StringSubject.java

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/*
 * Copyright (c) 2011 Google, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.google.common.truth;

import com.google.gwt.core.shared.GwtIncompatible;

/**
 * Propositions for String subjects
 *
 * @author David Saff
 * @author Christian Gruber (cgruber@israfil.net)
 */
public class StringSubject extends Subject<StringSubject, String> {
    public StringSubject(FailureStrategy failureStrategy, String string) {
        super(failureStrategy, string);
    }

    @Override
    protected String getDisplaySubject() {
        return (internalCustomName() == null) ? "<" + quote(getSubject()) + ">"
                : "\"" + internalCustomName() + "\"";
    }

    @Override
    public void is(Object expected) {
        isEqualTo(expected);
    }

    @Override
    public void isEqualTo(Object expected) {
        if (getSubject() == null) {
            if (expected != null) {
                if (expected instanceof String) {
                    failWithRawMessage("Not true that null reference is equal to <%s>", quote((String) expected));
                } else {
                    failWithRawMessage("Not true that null reference is equal to (%s)<%s>",
                            expected.getClass().getName(), expected);
                }
            }
        } else {
            if (expected == null) {
                isNull();
            } else if (!(expected instanceof String)) {
                failWithRawMessage("Not true that %s is equal to (%s)<%s>", getDisplaySubject(),
                        expected.getClass().getName(), expected);
            } else if (!getSubject().equals(expected)) {
                if (expected instanceof String) {
                    failureStrategy.failComparing("", (String) expected, getSubject());
                } else {
                    failWithRawMessage("Not true that %s equal to (%s)<%s>", getDisplaySubject(),
                            expected.getClass().getName(), expected);
                }
            }
        }
    }

    @Override
    public void isNull() {
        if (getSubject() != null) {
            failWithRawMessage("Not true that %s is null", getDisplaySubject());
        }
    }

    public void contains(String string) {
        if (string == null) {
            throw new IllegalArgumentException("Cannot test that a string contains a null reference");
        }
        if (getSubject() == null) {
            failWithRawMessage("Not true that null reference contains <%s>", quote(string));
        } else if (!getSubject().contains(string)) {
            fail("contains", quote(string));
        }
    }

    public void doesNotContain(String string) {
        if (string == null) {
            throw new IllegalArgumentException("Cannot test that a string does not contain a null reference");
        }
        if (getSubject() == null) {
            failWithRawMessage("Not true that null reference contains <%s>", quote(string));
        } else if (getSubject().contains(string)) {
            failWithRawMessage("%s unexpectedly contains <%s>", getDisplaySubject(), quote(string));
        }
    }

    public void startsWith(String string) {
        if (string == null) {
            throw new IllegalArgumentException("Cannot test that a string starts with a null reference");
        }
        if (getSubject() == null) {
            failWithRawMessage("Not true that null reference starts with <%s>", quote(string));
        } else if (!getSubject().startsWith(string)) {
            fail("starts with", quote(string));
        }
    }

    public void endsWith(String string) {
        if (string == null) {
            throw new IllegalArgumentException("Cannot test that a string ends with a null reference");
        }
        if (getSubject() == null) {
            failWithRawMessage("Not true that null reference ends with <%s>", quote(string));
        } else if (!getSubject().endsWith(string)) {
            fail("ends with", quote(string));
        }
    }

    public static final SubjectFactory<StringSubject, String> STRING = new SubjectFactory<StringSubject, String>() {
        @Override
        public StringSubject getSubject(FailureStrategy fs, String target) {
            return new StringSubject(fs, target);
        }
    };

    private static String quote(String toBeWrapped) {
        return "\"" + toBeWrapped + "\"";
    }

    @GwtIncompatible("java.util.regex.Pattern")
    public void matches(String regex) {
        if (!getSubject().matches(regex)) {
            fail("matches", regex);
        }
    }

    @GwtIncompatible("java.util.regex.Pattern")
    public void matches(java.util.regex.Pattern regex) {
        if (!regex.matcher(getSubject()).matches()) {
            fail("matches", regex);
        }
    }

    @GwtIncompatible("java.util.regex.Pattern")
    public void doesNotMatch(String regex) {
        if (getSubject().matches(regex)) {
            fail("fails to match", regex);
        }
    }

    @GwtIncompatible("java.util.regex.Pattern")
    public void doesNotMatch(java.util.regex.Pattern regex) {
        if (regex.matcher(getSubject()).matches()) {
            fail("fails to match", regex);
        }
    }
}