fix(48191): Duplicates comments on "Add definite assignment assertion to property" (#48299)

* Suppress leading and trailing comments for adding missing definite assignment assertion action

* Suppress leading and trailing comments for adding missing initalizer action

* Test for initializer property action

src/services/codefixes/fixStrictClassInitialization.ts

@@ -67,6 +67,7 @@ namespace ts.codefix {
     }
 
     function addDefiniteAssignmentAssertion(changeTracker: textChanges.ChangeTracker, propertyDeclarationSourceFile: SourceFile, propertyDeclaration: PropertyDeclaration): void {
+        suppressLeadingAndTrailingTrivia(propertyDeclaration);
         const property = factory.updatePropertyDeclaration(
             propertyDeclaration,
             propertyDeclaration.decorators,
@@ -108,6 +109,7 @@ namespace ts.codefix {
     }
 
     function addInitializer(changeTracker: textChanges.ChangeTracker, propertyDeclarationSourceFile: SourceFile, propertyDeclaration: PropertyDeclaration, initializer: Expression): void {
+        suppressLeadingAndTrailingTrivia(propertyDeclaration);
         const property = factory.updatePropertyDeclaration(
             propertyDeclaration,
             propertyDeclaration.decorators,

tests/cases/fourslash/codeFixClassPropertyInitialization17.ts

@@ -0,0 +1,17 @@
+/// <reference path='fourslash.ts' />
+
+// @strict: true
+
+//// class T {
+////     // comment
+////     a: string;
+//// }
+
+verify.codeFix({
+    description: `Add definite assignment assertion to property 'a: string;'`,
+    newFileContent: `class T {
+    // comment
+    a!: string;
+}`,
+    index: 1
+})

tests/cases/fourslash/codeFixClassPropertyInitialization18.ts

@@ -0,0 +1,15 @@
+/// <reference path='fourslash.ts' />
+
+// @strict: true
+
+//// class T {
+////     a: string; // comment
+//// }
+
+verify.codeFix({
+    description: `Add definite assignment assertion to property 'a: string;'`,
+    newFileContent: `class T {
+    a!: string; // comment
+}`,
+    index: 1
+})

tests/cases/fourslash/codeFixClassPropertyInitialization19.ts

@@ -0,0 +1,17 @@
+/// <reference path='fourslash.ts' />
+
+// @strict: true
+
+//// class T {
+////     // comment
+////     a: 2;
+//// }
+
+verify.codeFix({
+    description: `Add initializer to property 'a'`,
+    newFileContent: `class T {
+    // comment
+    a: 2 = 2;
+}`,
+    index: 2
+})

tests/cases/fourslash/codeFixClassPropertyInitialization20.ts

@@ -0,0 +1,15 @@
+/// <reference path='fourslash.ts' />
+
+// @strict: true
+
+//// class T {
+////     a: 2; // comment
+//// }
+
+verify.codeFix({
+    description: `Add initializer to property 'a'`,
+    newFileContent: `class T {
+    a: 2 = 2; // comment
+}`,
+    index: 2
+})