Basic API in place, some tests working

Reading an image, getting its dimensions, and resizing are working.

cargo test passes

tests/lib.rs

@@ -0,0 +1,56 @@
+/*
+ * Copyright 2015 Nathan Fiedler
+ *
+ * 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.
+ */
+
+extern crate magick_rust;
+
+use magick_rust::{MagickWand, magick_wand_genesis};
+use magick_rust::filters::{FilterType};
+
+use std::sync::{Once, ONCE_INIT};
+
+// Used to make sure MagickWand is initialized exactly once. Note that we
+// do not bother shutting down, we simply exit when the tests are done.
+static START: Once = ONCE_INIT;
+
+#[test]
+fn test_new_drop() {
+    START.call_once(|| {
+        magick_wand_genesis();
+    });
+    MagickWand::new();
+}
+
+#[test]
+fn test_resize_image() {
+    START.call_once(|| {
+        magick_wand_genesis();
+    });
+    let wand = MagickWand::new();
+    assert!(wand.read_image("tests/data/IMG_5745.JPG").is_ok());
+    assert_eq!(512, wand.get_image_width());
+    assert_eq!(384, wand.get_image_height());
+    let halfwidth = match wand.get_image_width() {
+        1 => 1,
+        width => width / 2
+    };
+    let halfheight = match wand.get_image_height() {
+        1 => 1,
+        height => height / 2
+    };
+    wand.resize_image(halfwidth, halfheight, FilterType::LanczosFilter, 1.0);
+    assert_eq!(256, wand.get_image_width());
+    assert_eq!(192, wand.get_image_height());
+}