tests: port new postData tests from upstream (#335)

playwright/src/test/java/com/microsoft/playwright/TestNetworkPostData.java

@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.microsoft.playwright;
+
+import com.google.gson.Gson;
+import org.junit.jupiter.api.Test;
+
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+
+import static com.microsoft.playwright.Utils.mapOf;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class TestNetworkPostData extends TestBase {
+  @Test
+  void shouldReturnCorrectPostDataBufferForUtf8Body() {
+    page.navigate(server.EMPTY_PAGE);
+    String value = "baẞ";
+    Request request = page.waitForRequest("**", () -> {
+      page.evaluate("({url, value}) => {\n" +
+        "  const request = new Request(url, {\n" +
+        "    method: 'POST',\n" +
+        "    body: JSON.stringify(value),\n" +
+        "  });\n" +
+        "  request.headers.set('content-type', 'application/json;charset=UTF-8');\n" +
+        "  return fetch(request);\n" +
+        "}", mapOf("url", server.PREFIX + "/title.html", "value", value));
+    });
+    assertTrue(Arrays.equals(new Gson().toJson(value).getBytes(StandardCharsets.UTF_8), request.postDataBuffer()));
+    assertEquals(new Gson().toJson(value), request.postData());
+  }
+
+  @Test
+  void shouldReturnPostDataWOContentType() {
+    page.navigate(server.EMPTY_PAGE);
+    Request request = page.waitForRequest("**", () -> {
+      page.evaluate("({url}) => {\n" +
+        "  const request = new Request(url, {\n" +
+        "    method: 'POST',\n" +
+        "    body: JSON.stringify({ value: 42 }),\n" +
+        "  });\n" +
+        "  request.headers.set('content-type', '');\n" +
+        "  return fetch(request);\n" +
+        "}", mapOf("url", server.PREFIX + "/title.html"));
+    });
+    assertEquals(new Gson().toJson(mapOf("value", 42)), request.postData());
+  }
+
+  void shouldThrowOnInvalidJSONInPostData() {
+      // Thre is no postDataJSON() in java
+  }
+
+  @Test
+  void shouldReturnPostDataForPUTRequests() {
+    page.navigate(server.EMPTY_PAGE);
+    Request request = page.waitForRequest("**", () -> {
+      page.evaluate("({url}) => {\n" +
+        "  const request = new Request(url, {\n" +
+        "    method: 'PUT',\n" +
+        "    body: JSON.stringify({ value: 42 }),\n" +
+        "  });\n" +
+        "  return fetch(request);\n" +
+        "}", mapOf("url", server.PREFIX + "/title.html"));
+    });
+    assertEquals(new Gson().toJson(mapOf("value", 42)), request.postData());
+  }
+}