Add test for "migrate constructor binding for multimodule project" (#376)

Co-authored-by: Sandeep Nagaraj <[email protected]>

Author: ashakirin

applications/spring-shell/src/test/java/org/springframework/sbm/BootUpgrade_27_30_MultiModule_IntegrationTest.java

@@ -50,9 +50,27 @@ void migrateMultiModuleApplication() {
         verifyParentPomVersion();
         verifyYamlConfigurationUpdate();
         verifyPropertyConfigurationUpdate();
+        verifyConstructorBindingRemoval();
         verifyEhCacheVersionIsUpgraded();
     }
 
+    private void verifyConstructorBindingRemoval() {
+        String constructorBindingConfigClass = loadJavaFileFromSubmodule("spring-app/", "org.springboot.example.upgrade", "ConstructorBindingConfig");
+        assertThat(constructorBindingConfigClass).isEqualTo("package org.springboot.example.upgrade;\n" +
+                "\n" +
+                "import org.springframework.boot.context.properties.ConfigurationProperties;\n" +
+                "\n" +
+                "@ConfigurationProperties(prefix = \"mail\")\n" +
+                "public class ConstructorBindingConfig {\n" +
+                "    private String hostName;\n" +
+                "\n" +
+                "    public ConstructorBindingConfig(String hostName) {\n" +
+                "        this.hostName = hostName;\n" +
+                "    }\n" +
+                "}" +
+                "\n");
+    }
+
     private void verifyYamlConfigurationUpdate() {
         String micrometerClass = loadFile(Path.of("spring-app/src/main/resources/application.yaml"));
         assertThat(micrometerClass).isEqualTo(
@@ -136,7 +154,6 @@ private void verifyPropertyConfigurationUpdate() {
                         "spring.datasource.username=sa\n" +
                         "spring.datasource.password=password\n" +
                         "spring.jpa.database-platform=org.hibernate.dialect.H2Dialect\n");
-
     }
 
     private void verifyEhCacheVersionIsUpgraded() {

applications/spring-shell/src/test/java/org/springframework/sbm/IntegrationTestBaseClass.java

@@ -318,16 +318,20 @@ protected void replaceFile(Path target, Path source) {
         }
     }
 
-    protected String loadJavaFile(String packageName, String className) {
+    protected String loadJavaFileFromSubmodule(String submodulePath, String packageName, String className) {
         try {
-            Path classPath = testDir.resolve("src/main/java").resolve(packageName.replace(".", "/"));
+            Path classPath = testDir.resolve(submodulePath + "src/main/java").resolve(packageName.replace(".", "/"));
             Path classFile = classPath.resolve(className + ".java");
             return Files.readString(classFile);
         } catch (IOException e) {
             throw new RuntimeException(e);
         }
     }
 
+    protected String loadJavaFile(String packageName, String className) {
+        return loadJavaFileFromSubmodule("", packageName, className);
+    }
+
     /**
      * Starts {@code image} as Docker container exposing {@code ports} and waiting for {@code httpEndpoint} to be available.
      */