add tests

crates/uv/tests/edit.rs

@@ -643,6 +643,149 @@ fn update_registry() -> Result<()> {
     Ok(())
 }
 
+/// Adding a dependency does not clean the environment.
+#[test]
+fn add_no_clean() -> Result<()> {
+    let context = TestContext::new("3.12");
+
+    let pyproject_toml = context.temp_dir.child("pyproject.toml");
+    pyproject_toml.write_str(indoc! {r#"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = [
+            "anyio == 3.7.0",
+        ]
+    "#})?;
+
+    uv_snapshot!(context.filters(), context.lock(), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv lock` is experimental and may change without warning.
+    Resolved 4 packages in [TIME]
+    "###);
+
+    uv_snapshot!(context.filters(), context.sync(), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv sync` is experimental and may change without warning.
+    Downloaded 4 packages in [TIME]
+    Installed 4 packages in [TIME]
+     + anyio==3.7.0
+     + idna==3.6
+     + project==0.1.0 (from file://[TEMP_DIR]/)
+     + sniffio==1.3.1
+    "###);
+
+    // Manually remove a dependency.
+    pyproject_toml.write_str(indoc! {r#"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = []
+    "#})?;
+
+    uv_snapshot!(context.filters(), context.add(&["iniconfig==2.0.0"]), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv add` is experimental and may change without warning.
+    Resolved 2 packages in [TIME]
+    Downloaded 2 packages in [TIME]
+    Uninstalled 1 package in [TIME]
+    Installed 2 packages in [TIME]
+     + iniconfig==2.0.0
+     - project==0.1.0 (from file://[TEMP_DIR]/)
+     + project==0.1.0 (from file://[TEMP_DIR]/)
+    "###);
+
+    let pyproject_toml = fs_err::read_to_string(context.temp_dir.join("pyproject.toml"))?;
+
+    insta::with_settings!({
+        filters => context.filters(),
+    }, {
+        assert_snapshot!(
+            pyproject_toml, @r###"
+        [project]
+        name = "project"
+        version = "0.1.0"
+        requires-python = ">=3.12"
+        dependencies = [
+            "iniconfig==2.0.0",
+        ]
+        "###
+        );
+    });
+
+    let lock = fs_err::read_to_string(context.temp_dir.join("uv.lock"))?;
+
+    insta::with_settings!({
+        filters => context.filters(),
+    }, {
+        assert_snapshot!(
+            lock, @r###"
+        version = 1
+        requires-python = ">=3.12"
+
+        [[distribution]]
+        name = "iniconfig"
+        version = "2.0.0"
+        source = "registry+https://pypi.org/simple"
+        sdist = { url = "https://files.pythonhosted.org/packages/d7/4b/cbd8e699e64a6f16ca3a8220661b5f83792b3017d0f79807cb8708d33913/iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3", size = 4646 }
+        wheels = [{ url = "https://files.pythonhosted.org/packages/ef/a6/62565a6e1cf69e10f5727360368e451d4b7f58beeac6173dc9db836a5b46/iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374", size = 5892 }]
+
+        [[distribution]]
+        name = "project"
+        version = "0.1.0"
+        source = "editable+."
+        sdist = { path = "." }
+
+        [[distribution.dependencies]]
+        name = "iniconfig"
+        version = "2.0.0"
+        source = "registry+https://pypi.org/simple"
+        "###
+        );
+    });
+
+    // Install from the lockfile without cleaning the environment.
+    uv_snapshot!(context.filters(), context.sync().arg("--no-clean"), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv sync` is experimental and may change without warning.
+    Audited 2 packages in [TIME]
+    "###);
+
+    // Install from the lockfile, cleaning the environment.
+    uv_snapshot!(context.filters(), context.sync(), @r###"
+    success: true
+    exit_code: 0
+    ----- stdout -----
+
+    ----- stderr -----
+    warning: `uv sync` is experimental and may change without warning.
+    Uninstalled 3 packages in [TIME]
+     - anyio==3.7.0
+     - idna==3.6
+     - sniffio==1.3.1
+    "###);
+
+    Ok(())
+}
+
 /// Remove a PyPI requirement.
 #[test]
 fn remove_registry() -> Result<()> {