Add version bump and revert tests

Two tests are added to `version.rs`, testing version bump and version revert functionalities. The new tests cover the whole process of version change in a package, from the initial version to the updated version, as well as the reverting back to the original version.

module/move/willbe/tests/inc/entity/version.rs

@@ -1,5 +1,26 @@
-use crate::the_module::version::Version;
+use crate::*;
+
+use std::path::{ Path, PathBuf };
 use std::str::FromStr;
+use std::io::Write;
+use assert_fs::prelude::*;
+use the_module::
+{
+  CrateDir,
+  Manifest,
+  version::Version,
+  _path::AbsolutePath,
+  package::Package,
+  version::{ BumpOptions, version_bump, version_revert },
+};
+
+const TEST_MODULE_PATH : &str = "../../test/";
+
+fn package_path< P : AsRef< Path > >( path : P ) -> PathBuf
+{
+  let root_path = Path::new( env!( "CARGO_MANIFEST_DIR" ) ).join( TEST_MODULE_PATH );
+  root_path.join( path )
+}
 
 #[ test ]
 fn patch()
@@ -78,3 +99,129 @@ fn major_with_patches()
   // Assert
   assert_eq!( "2.0.0", &new_version.to_string() );
 }
+
+#[ test ]
+fn package_version_bump()
+{
+  // Arrange
+  let c = package_path( "c" );
+  let temp = assert_fs::TempDir::new().unwrap();
+  let temp_module = temp.child( "module" );
+  std::fs::create_dir( &temp_module ).unwrap();
+  temp_module.child( "c" ).copy_from( &c, &[ "**" ] ).unwrap();
+  let c_temp_path = temp_module.join( "c" );
+  let c_temp_absolute_path = AbsolutePath::try_from( c_temp_path ).unwrap();
+  let c_temp_crate_dir = CrateDir::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let c_package = Package::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let version = c_package.version().unwrap();
+
+  let root_manifest_path =  temp.join( "Cargo.toml" );
+  let mut cargo_toml = std::fs::File::create( &root_manifest_path ).unwrap();
+  let root_manifest_absolute_path = AbsolutePath::try_from( root_manifest_path.as_path() ).unwrap();
+  write!( cargo_toml, r#"
+[workspace]
+resolver = "2"
+members = [
+    "module/*",
+]
+[workspace.dependencies.test_experimental_c]
+version = "{version}"
+path = "module/c"
+default-features = true
+"# ).unwrap();
+  let version = Version::try_from( &version ).unwrap();
+  let bumped_version = version.clone().bump();
+
+  // Act
+  let options = BumpOptions
+  {
+    crate_dir : c_temp_crate_dir,
+    old_version : version.clone(),
+    new_version : bumped_version.clone(),
+    dependencies : vec![ CrateDir::try_from( root_manifest_absolute_path.parent().unwrap() ).unwrap() ],
+    dry : false,
+  };
+  let bump_report = version_bump( options ).unwrap();
+
+  // Assert
+  assert_eq!( Some( version.to_string() ), bump_report.old_version );
+  assert_eq!( Some( bumped_version.to_string() ), bump_report.new_version );
+  assert_eq!
+  (
+    {
+      let mut v = vec![ root_manifest_absolute_path.clone(), c_temp_absolute_path.join( "Cargo.toml" ) ];
+      v.sort();
+      v
+    },
+    {
+      let mut v = bump_report.changed_files;
+      v.sort();
+      v
+    }
+  );
+  let c_package = Package::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let name = c_package.name().unwrap();
+  assert_eq!( bumped_version.to_string(), c_package.version().unwrap() );
+  let mut root_manifest = Manifest::try_from( root_manifest_absolute_path ).unwrap();
+  root_manifest.load().unwrap();
+  let data = root_manifest.data();
+  let current_version_item = data.get( "workspace" ).and_then( | w | w.get( "dependencies" ) ).and_then( | d | d.get( &name ) ).and_then( | p | p.get( "version" ) ).unwrap();
+  let current_version = current_version_item.as_str().unwrap();
+  assert_eq!( &bumped_version.to_string(), current_version );
+}
+
+#[ test ]
+fn package_version_bump_revert()
+{
+  // Arrange
+  let c = package_path( "c" );
+  let temp = assert_fs::TempDir::new().unwrap();
+  let temp_module = temp.child( "module" );
+  std::fs::create_dir( &temp_module ).unwrap();
+  temp_module.child( "c" ).copy_from( &c, &[ "**" ] ).unwrap();
+  let c_temp_path = temp_module.join( "c" );
+  let c_temp_absolute_path = AbsolutePath::try_from( c_temp_path ).unwrap();
+  let c_temp_crate_dir = CrateDir::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let c_package = Package::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let version = c_package.version().unwrap();
+
+  let root_manifest_path =  temp.join( "Cargo.toml" );
+  let mut cargo_toml = std::fs::File::create( &root_manifest_path ).unwrap();
+  let root_manifest_absolute_path = AbsolutePath::try_from( root_manifest_path.as_path() ).unwrap();
+  write!( cargo_toml, r#"
+[workspace]
+resolver = "2"
+members = [
+    "module/*",
+]
+[workspace.dependencies.test_experimental_c]
+version = "{version}"
+path = "module/c"
+default-features = true
+"# ).unwrap();
+  let version = Version::try_from( &version ).unwrap();
+  let bumped_version = version.clone().bump();
+
+  // Act
+  let options = BumpOptions
+  {
+    crate_dir : c_temp_crate_dir,
+    old_version : version.clone(),
+    new_version : bumped_version.clone(),
+    dependencies : vec![ CrateDir::try_from( root_manifest_absolute_path.parent().unwrap() ).unwrap() ],
+    dry : false,
+  };
+  let bump_report = version_bump( options ).unwrap();
+  version_revert( &bump_report ).unwrap();
+
+  // Assert
+  let c_package = Package::try_from( c_temp_absolute_path.clone() ).unwrap();
+  let name = c_package.name().unwrap();
+  assert_eq!( version.to_string(), c_package.version().unwrap() );
+  let mut root_manifest = Manifest::try_from( root_manifest_absolute_path ).unwrap();
+  root_manifest.load().unwrap();
+  let data = root_manifest.data();
+  let current_version_item = data.get( "workspace" ).and_then( | w | w.get( "dependencies" ) ).and_then( | d | d.get( &name ) ).and_then( | p | p.get( "version" ) ).unwrap();
+  let current_version = current_version_item.as_str().unwrap();
+  assert_eq!( &version.to_string(), current_version );
+}