Document properties that were removed without a deprecation period

This commit documents properties that are removed without being
deprecated first. Previously those properties were undocumented.

Closes gh-47762

Author: snicoll

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/Difference.java

@@ -40,7 +40,10 @@ static Difference compute(ConfigurationMetadataProperty oldProperty, Configurati
 			return null;
 		}
 		if (newProperty.isDeprecated() && !oldProperty.isDeprecated()) {
-			return new Difference(DifferenceType.DEPRECATED, oldProperty, newProperty);
+			Level level = newProperty.getDeprecation().getLevel();
+			DifferenceType differenceType = (level == Level.WARNING) ? DifferenceType.DEPRECATED
+					: DifferenceType.DELETED;
+			return new Difference(differenceType, oldProperty, newProperty);
 		}
 		if (oldProperty.isDeprecated() && oldProperty.getDeprecation().getLevel() == Level.WARNING
 				&& newProperty.isDeprecated() && newProperty.getDeprecation().getLevel() == Level.ERROR) {

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/test/java/org/springframework/boot/configurationmetadata/changelog/ChangelogTests.java

@@ -39,7 +39,7 @@ void diffContainsDifferencesBetweenLeftAndRightInputs() {
 		assertThat(differences).isNotNull();
 		assertThat(differences.oldVersionNumber()).isEqualTo("1.0");
 		assertThat(differences.newVersionNumber()).isEqualTo("2.0");
-		assertThat(differences.differences()).hasSize(6);
+		assertThat(differences.differences()).hasSize(7);
 		List<Difference> added = differences.differences()
 			.stream()
 			.filter((difference) -> difference.type() == DifferenceType.ADDED)
@@ -51,7 +51,8 @@ void diffContainsDifferencesBetweenLeftAndRightInputs() {
 			.stream()
 			.filter((difference) -> difference.type() == DifferenceType.DELETED)
 			.toList();
-		assertThat(deleted).hasSize(3)
+		assertThat(deleted).hasSize(4)
+			.anySatisfy((entry) -> assertProperty(entry.oldProperty(), "test.replace", String.class, "replace"))
 			.anySatisfy((entry) -> assertProperty(entry.oldProperty(), "test.delete", String.class, "delete"))
 			.anySatisfy(
 					(entry) -> assertProperty(entry.newProperty(), "test.delete.deprecated", String.class, "delete"))

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/test/resources/sample-1.0.json

@@ -6,6 +6,12 @@
       "description": "Test equality.",
       "defaultValue": "test"
     },
+    {
+      "name": "test.replace",
+      "type": "java.lang.String",
+      "description": "Test Replace.",
+      "defaultValue": "replace"
+    },
     {
       "name": "test.deprecate",
       "type": "java.lang.String",

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/test/resources/sample-2.0.json

@@ -6,6 +6,14 @@
       "description": "Test add.",
       "defaultValue": "new"
     },
+    {
+      "name": "test.replace",
+      "type": "java.lang.String",
+      "deprecation": {
+        "level": "error",
+        "replacement": "test.add"
+      }
+    },
     {
       "name": "test.add.deprecated",
       "type": "java.lang.String",
@@ -28,7 +36,7 @@
       "description": "Test deprecate.",
       "defaultValue": "wrong",
       "deprecation": {
-        "level": "error"
+        "level": "warn"
       }
     },
     {

configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/test/resources/sample.adoc

@@ -4,7 +4,13 @@ Configuration property changes between `1.0` and `2.0`
 
 == Deprecated in 2.0
 
-_None_.
+|======================
+| Key | Replacement | Reason
+
+| `test.deprecate`
+|
+|
+|======================
 
 
 
@@ -40,4 +46,8 @@ _None_.
 | `test.removed.directly`
 | `test.new.property`
 | removed in third-party library without deprecation
+
+| `test.replace`
+| `test.add`
+|
 |======================