Add tests for TypeInitializerClauseTests

Author: kimdv

Tests/SwiftSyntaxBuilderTest/TypeInitializerClauseTests.swift

@@ -0,0 +1,24 @@
+import XCTest
+import SwiftSyntax
+import SwiftSyntaxBuilder
+
+final class TypeInitializerClauseTests: XCTestCase {
+  func testTypeInitializerClause() {
+    let leadingTrivia = Trivia.garbageText("␣")
+    let testCases: [UInt: (ExpressibleAsTypeInitializerClause, String)] = [
+      #line: ("String", "␣ = String"),
+      #line: (ArrayType(elementType: "String"), "␣ = [String]")
+    ]
+    
+    for (line, testCase) in testCases {
+      let (builder, expected) = testCase
+      let typeInitializerClause = builder.createTypeInitializerClause()
+      let syntax = typeInitializerClause.buildSyntax(format: Format(), leadingTrivia: leadingTrivia)
+      
+      var text = ""
+      syntax.write(to: &text)
+      
+      XCTAssertEqual(text, expected, line: line)
+    }
+  }
+}