NOISSUE - Refactor integration tests:

* Group tests by category
* Pull out shared methods

Signed-off-by: joshmc <[email protected]>

cargo-geiger/tests/context/mod.rs

@@ -0,0 +1,44 @@
+use std::env;
+use std::path::{Path, PathBuf};
+use tempfile::TempDir;
+use url::Url;
+
+pub struct Context {
+    _dir: TempDir,
+    pub path: PathBuf,
+}
+
+impl Context {
+    pub fn new() -> Self {
+        let manifest_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
+        let src_path = Path::new(&manifest_dir).join("../test_crates");
+        let dir = TempDir::new().unwrap();
+        let copy_options = fs_extra::dir::CopyOptions {
+            content_only: true,
+            ..Default::default()
+        };
+        fs_extra::dir::copy(&src_path, dir.path(), &copy_options)
+            .expect("Failed to copy tests");
+        let path = dir
+            .path()
+            .canonicalize()
+            .expect("Failed to canonicalize temporary path");
+        // Canonicalizing on Windows returns a UNC path (starting with `\\?\`).
+        // `cargo build` (as of 1.47.0) fails to use an overriding path dependency if the manifest
+        // given to `cargo build` is a UNC path. Roudtripping to URL gets rid of the UNC prefix.
+        let path = if cfg!(windows) {
+            Url::from_file_path(path)
+                .expect("URL from path must succeed")
+                .to_file_path()
+                .expect("Roundtripping path to URL must succeed")
+        } else {
+            path
+        };
+        let _dir = dir;
+        Context { _dir, path }
+    }
+
+    pub fn crate_dir(&self, name: &str) -> PathBuf {
+        self.path.join(name)
+    }
+}