fix tests on windows (#331)

They need double-backslashes due to the escaping logic in git-config
files. They aren't particularly friendly to windows, which seems
like a fair trade-off.

git-config/tests/file/from_env/mod.rs

@@ -1,5 +1,6 @@
 use std::{borrow::Cow, env, fs};
 
+use crate::file::from_paths::escape_backslashes;
 use git_config::{
     file::{from_env, from_paths, from_paths::Options},
     File,
@@ -131,11 +132,11 @@ fn follow_include_paths() {
         .set("GIT_CONFIG_KEY_0", "core.key")
         .set("GIT_CONFIG_VALUE_0", "value")
         .set("GIT_CONFIG_KEY_1", "include.path")
-        .set("GIT_CONFIG_VALUE_1", a_path.to_str().unwrap())
+        .set("GIT_CONFIG_VALUE_1", escape_backslashes(a_path))
         .set("GIT_CONFIG_KEY_2", "other.path")
-        .set("GIT_CONFIG_VALUE_2", b_path.to_str().unwrap())
+        .set("GIT_CONFIG_VALUE_2", escape_backslashes(&b_path))
         .set("GIT_CONFIG_KEY_3", "include.origin.path")
-        .set("GIT_CONFIG_VALUE_3", b_path.to_str().unwrap());
+        .set("GIT_CONFIG_VALUE_3", escape_backslashes(b_path));
 
     let config = File::from_env(Options::default()).unwrap().unwrap();
 

git-config/tests/file/from_paths/includes/conditional/gitdir/mod.rs

@@ -25,7 +25,7 @@ fn relative_path_without_trailing_slash_and_dot_git_suffix_matches() -> crate::R
 
 #[test]
 fn tilde_slash_expands_the_current_user_home() -> crate::Result {
-    let env = GitEnv::repo_name(format!("subdir{}worktree", std::path::MAIN_SEPARATOR))?;
+    let env = GitEnv::repo_name(std::path::Path::new("subdir").join("worktree"))?;
     assert_section_value(Condition::new("gitdir:~/subdir/worktree/"), env)
 }
 
@@ -111,11 +111,7 @@ fn dot_slash_from_environment_causes_error() -> crate::Result {
         );
     }
 
-    let absolute_path = format!(
-        "{}{}include.config",
-        env.home_dir().display(),
-        std::path::MAIN_SEPARATOR
-    );
+    let absolute_path = escape_backslashes(env.home_dir().join("include.config"));
     {
         let _environment = crate::file::from_env::Env::new()
             .set("GIT_CONFIG_COUNT", "1")

git-config/tests/file/from_paths/mod.rs

@@ -6,7 +6,7 @@ use tempfile::tempdir;
 use crate::file::cow_str;
 
 /// Escapes backslash when writing a path as string so that it is a valid windows path
-fn escape_backslashes(path: impl AsRef<std::path::Path>) -> String {
+pub(crate) fn escape_backslashes(path: impl AsRef<std::path::Path>) -> String {
     path.as_ref().to_str().unwrap().replace('\\', "\\\\")
 }