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package org.hamcrest;
import org.junit.Test;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.core.IsEqual.equalTo;
import static org.junit.Assert.*;
public final class MatcherAssertTest {
@Test public void
includesDescriptionOfTestedValueInErrorMessage() {
String expected = "expected";
String actual = "actual";
String expectedMessage = "identifier\nExpected: \"expected\"\n but: was \"actual\"";
try {
assertThat("identifier", actual, equalTo(expected));
}
catch (AssertionError e) {
assertTrue(e.getMessage().startsWith(expectedMessage));
return;
}
fail("should have failed");
}
@Test public void
descriptionCanBeElided() {
String expected = "expected";
String actual = "actual";
String expectedMessage = "\nExpected: \"expected\"\n but: was \"actual\"";
try {
assertThat(actual, equalTo(expected));
}
catch (AssertionError e) {
assertTrue(e.getMessage().startsWith(expectedMessage));
return;
}
fail("should have failed");
}
@Test public void
canTestBooleanDirectly() {
assertThat("success reason message", true);
try {
assertThat("failing reason message", false);
}
catch (AssertionError e) {
assertEquals("failing reason message", e.getMessage());
return;
}
fail("should have failed");
}
@Test public void
includesMismatchDescription() {
Matcher<String> matcherWithCustomMismatchDescription = new BaseMatcher<String>() {
@Override
public boolean matches(Object item) {
return false;
}
@Override
public void describeTo(Description description) {
description.appendText("Something cool");
}
@Override
public void describeMismatch(Object item, Description mismatchDescription) {
mismatchDescription.appendText("Not cool");
}
};
String expectedMessage = "\nExpected: Something cool\n but: Not cool";
try {
assertThat("Value", matcherWithCustomMismatchDescription);
fail("should have failed");
}
catch (AssertionError e) {
assertEquals(expectedMessage, e.getMessage());
}
}
@Test public void
canAssertSubtypes() {
assertThat(1, equalTo((Number) 1));
}
}
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