move_uploaded_file is not working in MAMP - php

Question

I'm running into an issue using move_uploaded_file, specifically that it... doesn't work.
I have an input to upload the pdf:
<div>
Upload Resources
<input type="text" id="doc-name" name="doc-name">
<input type="file" id="doc-upload" name="doc-upload" accept="application/pdf">
<button id="upload-button">Upload</button>
</div>
And some jquery that sends a POST request with that file:
$("#upload-button").click(function() {
if ($('#doc-name').val() == '') {
var formData = new FormData();
var filename = $('#doc-name').val();
var uploaded = $('#doc-upload').val().split('\\');
var path = uploaded[uploaded.length - 1];
var file = $('#doc-upload').prop('files')[0];
formData.append("functionCall", "document-upload");
formData.append("filename", filename);
formData.append("path", path);
formData.append("file", file);
$.ajax({
url: '/assets/functions.php',
type: 'POST',
data: formData,
contentType: false,
processData: false,
success: function(e) {
console.log(e);
},
error: function(jqXHR, textStatus, errorMessage) {
console.log(jqXHR);
console.log(textStatus);
console.log(errorMessage);
}
});
)};
This sends to my functions file, which is set up kind of odd (it might actually be standard practice, I've just never seen it like this) in that it's one big switch statement; which case gets run is dependent on the functionCall variable passed in. So here is the function code for that specific case statement:
.
.
.
case "doc-upload":
$filename = $_POST['filename'];
$path = $_POST['path'];
$file = $_FILES['file'];
$uploadQuery = "INSERT INTO uploads (filename, path) VALUES ('$filename', '$path')";
$upload = mysql_query($uploadQuery);
if (move_uploaded_file($_FILES['file']['tmp_name'], 'test/' . $_FILES['files']['name'])) {
echo 'yay';
} else {
echo 'such is life';
}
Everything above the move_uploaded_file line works great, but I keep getting the 'such is life' line returned, and the transferred file does not show up in 'test/'. I know both the test folder and uploaded file are present thanks to a file_exists check. Any ideas about what I might have done wrong?