test: Add tests for path functions

Cargo.lock

@@ -58,6 +58,8 @@ dependencies = [
  "failure 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "flate2 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slog-async 2.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "slog-term 2.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "tar 0.4.17 (registry+https://github.com/rust-lang/crates.io-index)",
  "which 2.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "zip 0.4.2 (registry+https://github.com/rust-lang/crates.io-index)",

binary-install/Cargo.toml

@@ -7,6 +7,8 @@ curl = "0.4.13"
 failure = "0.1.2"
 flate2 = "1.0.2"
 slog = "2.3"
+slog-term = "2.4"
+slog-async = "2.3"
 tar = "0.4.16"
 which = "2.0.0"
 zip = "0.4.2"

binary-install/tests/path.rs

@@ -0,0 +1,70 @@
+extern crate binary_install;
+#[macro_use]
+extern crate slog;
+extern crate slog_async;
+extern crate slog_term;
+
+use binary_install::path::{bin_path, ensure_local_bin_dir, local_bin_path};
+use slog::Drain;
+use std::path::Path;
+
+fn logger() -> slog::Logger {
+    let decorator = slog_term::TermDecorator::new().build();
+    let drain = slog_term::FullFormat::new(decorator).build().fuse();
+    let drain = slog_async::Async::new(drain).build().fuse();
+    slog::Logger::root(drain, o!())
+}
+
+#[test]
+fn it_should_get_local_bin_path() {
+    let crate_path = Path::new("");
+
+    let expected_path = Path::new("bin/wasm-bindgen");
+
+    let result = local_bin_path(crate_path, "wasm-bindgen");
+
+    assert_eq!(expected_path, result);
+}
+
+#[test]
+#[cfg(target_os = "windows")]
+fn it_should_get_local_bin_path_with_exe_for_windows() {
+    let crate_path = Path::new("");
+
+    let expected_path = Path::new("bin/wasm-bindgen.exe");
+
+    let result = local_bin_path(crate_path, "wasm-bindgen");
+
+    assert_eq!(expected_path, result);
+}
+
+#[test]
+fn it_should_ensure_local_bin_dir_returns_ok_for_folder_that_exists() {
+    let crate_path = Path::new("random_folder");
+
+    let result = ensure_local_bin_dir(crate_path);
+
+    assert!(result.is_ok());
+}
+
+#[test]
+fn it_should_return_some_for_bin_path_that_exists() {
+    let crate_path = Path::new("/usr/bin");
+    let bin = "ls";
+
+    let result = bin_path(&logger(), crate_path, bin);
+    let expected_bin = Path::new("/usr/bin/ls");
+
+    assert!(result.is_some());
+    assert_eq!(result.unwrap(), expected_bin);
+}
+
+#[test]
+fn it_should_return_none_for_bin_path_that_does_not_exists() {
+    let crate_path = Path::new("random_folder");
+    let bin = "wasm-bindgen";
+
+    let result = bin_path(&logger(), crate_path, bin);
+
+    assert!(result.is_none());
+}