test: add unit tests for QueryProjectionBuilder

Author: Cole-SJ

querydsl-tooling/querydsl-apt/src/test/java/com/querydsl/apt/domain/QueryProjectionBuilderTest.java

@@ -0,0 +1,34 @@
+package com.querydsl.apt.domain;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+import com.querydsl.core.types.dsl.Expressions;
+import org.junit.Test;
+
+public class QueryProjectionBuilderTest {
+
+  @Test
+  public void builder_buildsQClassCorrectly() {
+    var property = Expressions.stringPath("x");
+    QQueryProjectionBuilderTestEntity dto =
+        QQueryProjectionBuilderTestEntity.builderTest1().setProperty(property).build();
+
+    assertNotNull(dto);
+    assertEquals(QueryProjectionBuilderTestEntity.class, dto.getType());
+  }
+
+  @Test
+  public void builder_buildsQClassCorrectly2() {
+    var property = Expressions.stringPath("x");
+    var intProperty = Expressions.numberPath(Integer.class, "y");
+    QQueryProjectionBuilderTestEntity dto =
+        QQueryProjectionBuilderTestEntity.builderTest2()
+            .setProperty(property)
+            .setIntProperty(intProperty)
+            .build();
+
+    assertNotNull(dto);
+    assertEquals(QueryProjectionBuilderTestEntity.class, dto.getType());
+  }
+}