Add a few unit tests for dacpac extension (#9194)

* add a few unit tests

* fix tests for linux

extensions/dacpac/src/wizard/api/basePage.ts

@@ -12,7 +12,7 @@ export abstract class BasePage {
 	protected readonly wizardPage: azdata.window.WizardPage;
 	protected readonly model: DacFxDataModel;
 	protected readonly view: azdata.ModelView;
-	protected databaseValues: string[];
+	public databaseValues: string[];
 
 	/**
 	 * This method constructs all the elements of the page.

extensions/dacpac/src/wizard/api/dacFxConfigPage.ts

@@ -207,7 +207,7 @@ export abstract class DacFxConfigPage extends BasePage {
 	}
 
 	// Compares database name with existing databases on the server
-	protected databaseNameExists(n: string): boolean {
+	public databaseNameExists(n: string): boolean {
 		for (let i = 0; i < this.databaseValues.length; ++i) {
 			if (this.databaseValues[i].toLowerCase() === n.toLowerCase()) {
 				// database name exists

extensions/dacpac/src/wizard/api/utils.ts

@@ -120,7 +120,7 @@ export function isValidBasenameErrorMessage(name: string | null | undefined): st
 	}
 
 	if (basename === '.' || basename === '..') {
-		return loc.reservedWindowsFilenameErrorMessage; // check for reserved values
+		return loc.reservedValueErrorMessage; // check for reserved values
 	}
 
 	if (isWindows && basename.length !== basename.trim().length) {
@@ -133,3 +133,7 @@ export function isValidBasenameErrorMessage(name: string | null | undefined): st
 
 	return '';
 }
+
+export function generateDatabaseName(filePath: string): string {
+	return path.parse(filePath).name;
+}