allow multiple file upload

Author: lsoares

lib/src/main/kotlin/seleniumtestinglib/UserEvent.kt

@@ -208,15 +208,20 @@ fun User.type(
 /**
  * https://testing-library.com/docs/user-event/utility#upload
  */
-fun User.upload(input: WebElement, file: File): User {
+fun User.upload(input: WebElement, vararg file: File): User {
+    val fileS = file.mapIndexed { idx, el -> el.toJS(1 + idx * 3) }
+        .joinToString(
+            prefix = "[".takeIf { file.size > 1 } ?: "",
+            postfix = "]".takeIf { file.size > 1 } ?: ""
+        )
     driver.executeScript(
-        "await user.upload(arguments[0], new File(arguments[1], arguments[2], arguments[3]))",
+        "await user.upload(arguments[0], $fileS)",
         input,
-        file.bits,
-        file.name,
-        file.options
+        *file.map { listOf(it.bits, it.name, it.options) }.flatten().toTypedArray()
     )
     return this
 }
 
-data class File(val bits: List<String>, val name: String, val options: Map<String, String> = emptyMap())
+data class File(val bits: List<String>, val name: String, val options: Map<String, String> = emptyMap()) {
+    internal fun toJS(i: Int) = "new File(arguments[$i], arguments[${i + 1}], arguments[${i + 2}])"
+}

lib/src/test/kotlin/seleniumtestinglib/interactions/UploadTest.kt

@@ -32,5 +32,31 @@ class UploadTest {
         assertEquals("hello".length.toLong(), upload["size"])
     }
 
-    // TODO: multiple files
+    @Test
+    fun `upload multiple`() {
+        driver.render(
+            """
+            <div>
+              <label for="file-uploader">Upload file:</label>
+              <input id="file-uploader" type="file" multiple />
+            </div>
+        """
+        )
+        val input = driver.findElement(labelText("upload file").exact(false))
+
+        driver.user.upload(
+            input,
+            File(listOf("hello1"), "hello.png", mapOf("type" to "image/png")),
+            File(listOf("hello2"), "hello.jpg", mapOf("type" to "image/jpeg")),
+        )
+
+        val upload = input.files
+        assertEquals(2, input.files.size)
+        assertEquals("hello.png", upload.first()["name"])
+        assertEquals("image/png", upload.first()["type"])
+        assertEquals("hello1".length.toLong(), upload.first()["size"])
+        assertEquals("hello.jpg", upload.last()["name"])
+        assertEquals("image/jpeg", upload.last()["type"])
+        assertEquals("hello2".length.toLong(), upload.last()["size"])
+    }
 }