/*
* Copyright 2012-2016 the original author or authors.
*
* 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 org.springframework.boot;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.springframework.boot.ansi.AnsiBackground;
import org.springframework.boot.ansi.AnsiColor;
import org.springframework.boot.ansi.AnsiOutput;
import org.springframework.boot.ansi.AnsiOutput.Enabled;
import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.core.io.ClassPathResource;
import org.springframework.mock.env.MockEnvironment;
import org.springframework.test.context.support.TestPropertySourceUtils;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link ImageBanner}.
*
* @author Craig Burke
* @author Phillip Webb
*/
public class ImageBannerTests {
private static final String NEW_LINE = System.getProperty("line.separator");
private static final char HIGH_LUMINANCE_CHARACTER = ' ';
private static final char LOW_LUMINANCE_CHARACTER = '@';
private static final String INVERT_TRUE = "banner.image.invert=true";
@Before
public void setup() {
AnsiOutput.setEnabled(AnsiOutput.Enabled.ALWAYS);
}
@After
public void cleanup() {
AnsiOutput.setEnabled(Enabled.DETECT);
}
@Test
public void printBannerShouldResetForegroundAndBackground() {
String banner = printBanner("black-and-white.gif");
String expected = AnsiOutput.encode(AnsiColor.DEFAULT)
+ AnsiOutput.encode(AnsiBackground.DEFAULT);
assertThat(banner).startsWith(expected);
}
@Test
public void printBannerWhenInvertedShouldResetForegroundAndBackground() {
String banner = printBanner("black-and-white.gif", INVERT_TRUE);
String expected = AnsiOutput.encode(AnsiColor.DEFAULT)
+ AnsiOutput.encode(AnsiBackground.BLACK);
assertThat(banner).startsWith(expected);
}
@Test
public void printBannerShouldPrintWhiteAsBrightWhiteHighLuminance() {
String banner = printBanner("black-and-white.gif");
String expected = AnsiOutput.encode(AnsiColor.BRIGHT_WHITE)
+ HIGH_LUMINANCE_CHARACTER;
assertThat(banner).contains(expected);
}
@Test
public void printBannerWhenInvertedShouldPrintWhiteAsBrightWhiteLowLuminance() {
String banner = printBanner("black-and-white.gif", INVERT_TRUE);
String expected = AnsiOutput.encode(AnsiColor.BRIGHT_WHITE)
+ LOW_LUMINANCE_CHARACTER;
assertThat(banner).contains(expected);
}
@Test
public void printBannerShouldPrintBlackAsBlackLowLuminance() {
String banner = printBanner("black-and-white.gif");
String expected = AnsiOutput.encode(AnsiColor.BLACK) + LOW_LUMINANCE_CHARACTER;
assertThat(banner).contains(expected);
}
@Test
public void printBannerWhenInvertedShouldPrintBlackAsBlackHighLuminance() {
String banner = printBanner("black-and-white.gif", INVERT_TRUE);
String expected = AnsiOutput.encode(AnsiColor.BLACK) + HIGH_LUMINANCE_CHARACTER;
assertThat(banner).contains(expected);
}
@Test
public void printBannerWhenShouldPrintAllColors() {
String banner = printBanner("colors.gif");
for (AnsiColor color : AnsiColor.values()) {
if (color != AnsiColor.DEFAULT) {
assertThat(banner).contains(AnsiOutput.encode(color));
}
}
}
@Test
public void printBannerShouldRenderGradient() throws Exception {
AnsiOutput.setEnabled(AnsiOutput.Enabled.NEVER);
String banner = printBanner("gradient.gif", "banner.image.width=10",
"banner.image.margin=0");
assertThat(banner).contains("@#8&o:*. ");
}
@Test
public void printBannerShouldCalculateHeight() throws Exception {
String banner = printBanner("large.gif", "banner.image.width=20");
assertThat(getBannerHeight(banner)).isEqualTo(10);
}
@Test
public void printBannerWhenHasHeightPropertyShouldSetHeight() throws Exception {
String banner = printBanner("large.gif", "banner.image.width=20",
"banner.image.height=30");
assertThat(getBannerHeight(banner)).isEqualTo(30);
}
@Test
public void printBannerShouldCapWidthAndCalculateHeight() throws Exception {
AnsiOutput.setEnabled(AnsiOutput.Enabled.NEVER);
String banner = printBanner("large.gif", "banner.image.margin=0");
assertThat(getBannerWidth(banner)).isEqualTo(76);
assertThat(getBannerHeight(banner)).isEqualTo(37);
}
@Test
public void printBannerShouldPrintMargin() throws Exception {
AnsiOutput.setEnabled(AnsiOutput.Enabled.NEVER);
String banner = printBanner("large.gif");
String[] lines = banner.split(NEW_LINE);
for (int i = 2; i < lines.length - 1; i++) {
assertThat(lines[i]).startsWith(" @");
}
}
@Test
public void printBannerWhenHasMarginPropertyShouldPrintSizedMargin()
throws Exception {
AnsiOutput.setEnabled(AnsiOutput.Enabled.NEVER);
String banner = printBanner("large.gif", "banner.image.margin=4");
String[] lines = banner.split(NEW_LINE);
for (int i = 2; i < lines.length - 1; i++) {
assertThat(lines[i]).startsWith(" @");
}
}
private int getBannerHeight(String banner) {
return banner.split(NEW_LINE).length - 3;
}
private int getBannerWidth(String banner) {
int width = 0;
for (String line : banner.split(NEW_LINE)) {
width = Math.max(width, line.length());
}
return width;
}
private String printBanner(String path, String... properties) {
ImageBanner banner = new ImageBanner(new ClassPathResource(path, getClass()));
ConfigurableEnvironment environment = new MockEnvironment();
TestPropertySourceUtils.addInlinedPropertiesToEnvironment(environment,
properties);
ByteArrayOutputStream out = new ByteArrayOutputStream();
banner.printBanner(environment, getClass(), new PrintStream(out));
return out.toString();
}
}