Test terminal can set dimensions

- ShellTest now has fields which can be used to
  change terminal default widht/height.
- Backed by properties so can be used with
  `spring.shell.test.terminal-width` and
  `spring.shell.test.terminal-height`.
- Fixes #656

spring-shell-test-autoconfigure/src/main/java/org/springframework/shell/test/autoconfigure/ShellAutoConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 the original author or authors.
+ * Copyright 2022-2023 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.
@@ -25,6 +25,7 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.context.annotation.Bean;
 import org.springframework.shell.boot.JLineShellAutoConfiguration;
 import org.springframework.shell.boot.TerminalCustomizer;
@@ -33,6 +34,7 @@ import org.springframework.shell.test.jediterm.terminal.ui.JediTermWidget;
 import org.springframework.shell.test.jediterm.terminal.ui.TerminalSession;
 
 @AutoConfiguration(before = JLineShellAutoConfiguration.class)
+@EnableConfigurationProperties(SpringShellTestProperties.class)
 public class ShellAutoConfiguration {
 
 	@Bean
@@ -55,8 +57,8 @@ public class ShellAutoConfiguration {
 	}
 
 	@Bean
-	TerminalSession terminalSession(TtyConnector ttyConnector) {
-		JediTermWidget widget = new JediTermWidget(80, 24);
+	TerminalSession terminalSession(TtyConnector ttyConnector, SpringShellTestProperties properties) {
+		JediTermWidget widget = new JediTermWidget(properties.getTerminalWidth(), properties.getTerminalHeight());
 		widget.setTtyConnector(ttyConnector);
 		return widget;
 	}

spring-shell-test-autoconfigure/src/main/java/org/springframework/shell/test/autoconfigure/ShellTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2022 the original author or authors.
+ * Copyright 2022-2023 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.
@@ -28,6 +28,8 @@ import org.springframework.boot.autoconfigure.ImportAutoConfiguration;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.test.autoconfigure.OverrideAutoConfiguration;
 import org.springframework.boot.test.autoconfigure.filter.TypeExcludeFilters;
+import org.springframework.boot.test.autoconfigure.properties.PropertyMapping;
+import org.springframework.boot.test.autoconfigure.properties.SkipPropertyMapping;
 import org.springframework.context.annotation.ComponentScan.Filter;
 import org.springframework.core.annotation.AliasFor;
 import org.springframework.core.env.Environment;
@@ -61,6 +63,22 @@ public @interface ShellTest {
 	 */
 	String[] properties() default {};
 
+	/**
+	 * Set emulated terminal width.
+	 *
+	 * @return emulated terminal width
+	 */
+	@PropertyMapping(value = "spring.shell.test.terminal-width", skip = SkipPropertyMapping.ON_DEFAULT_VALUE)
+	int terminalWidth() default 80;
+
+	/**
+	 * Set emulated terminal height.
+	 *
+	 * @return emulated terminal height
+	 */
+	@PropertyMapping(value = "spring.shell.test.terminal-height", skip = SkipPropertyMapping.ON_DEFAULT_VALUE)
+	int terminalHeight() default 24;
+
 	/**
 	 * Determines if default filtering should be used with
 	 * {@link SpringBootApplication @SpringBootApplication}.

spring-shell-test-autoconfigure/src/main/java/org/springframework/shell/test/autoconfigure/SpringShellTestProperties.java

@@ -0,0 +1,53 @@
+/*
+ * Copyright 2023 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
+ *
+ *      https://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.shell.test.autoconfigure;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+
+/**
+ * Configuration properties for shell test.
+ *
+ * @author Janne Valkealahti
+ */
+@ConfigurationProperties(prefix = "spring.shell.test")
+public class SpringShellTestProperties {
+
+	/**
+	 * Width of an emulated terminal.
+	 */
+	private int terminalWidth = 80;
+
+	/**
+	 * Height of an emulated terminal.
+	 */
+	private int terminalHeight = 24;
+
+	public int getTerminalWidth() {
+		return terminalWidth;
+	}
+
+	public void setTerminalWidth(int terminalWidth) {
+		this.terminalWidth = terminalWidth;
+	}
+
+	public int getTerminalHeight() {
+		return terminalHeight;
+	}
+
+	public void setTerminalHeight(int terminalHeight) {
+		this.terminalHeight = terminalHeight;
+	}
+}