Move out and rewrite UseTree completion tests

crates/ide_completion/src/tests/use_tree.rs

@@ -0,0 +1,261 @@
+use expect_test::{expect, Expect};
+
+use crate::tests::completion_list;
+
+fn check(ra_fixture: &str, expect: Expect) {
+    let actual = completion_list(ra_fixture);
+    expect.assert_eq(&actual)
+}
+
+#[test]
+fn use_tree_start() {
+    cov_mark::check!(only_completes_modules_in_import);
+    check(
+        r#"
+//- /lib.rs crate:main deps:other_crate
+use f$0
+
+struct Foo;
+mod foo {}
+//- /other_crate/lib.rs crate:other_crate
+// nothing here
+"#,
+        // FIXME: self in this case should also get the colons
+        expect![[r#"
+            kw crate::
+            kw self
+            kw super::
+            md foo
+            md other_crate
+        "#]],
+    );
+}
+
+#[test]
+fn dont_complete_current_use() {
+    cov_mark::check!(dont_complete_current_use);
+    // FIXME: self shouldn't be here
+    check(
+        r#"use self::foo$0;"#,
+        expect![[r#"
+        kw self
+    "#]],
+    );
+    check(
+        r#"
+mod foo { pub struct S; }
+use self::{foo::*, bar$0};
+"#,
+        expect![[r#"
+            kw self
+            st S
+            md foo
+        "#]],
+    );
+}
+
+#[test]
+fn nested_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+mod foo {
+    pub mod bar {
+        pub struct FooBar;
+    }
+}
+use foo::{bar::$0}
+"#,
+        expect![[r#"
+            kw self
+            st FooBar
+        "#]],
+    );
+    check(
+        r#"
+mod foo {
+    pub mod bar {
+        pub struct FooBar;
+    }
+}
+use foo::{$0}
+"#,
+        expect![[r#"
+            kw self
+            md bar
+        "#]],
+    );
+}
+
+#[test]
+fn deeply_nested_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+mod foo {
+    pub mod bar {
+        pub mod baz {
+            pub struct FooBarBaz;
+        }
+    }
+}
+use foo::{bar::{baz::$0}}
+"#,
+        expect![[r#"
+            kw self
+            st FooBarBaz
+        "#]],
+    );
+    check(
+        r#"
+mod foo {
+    pub mod bar {
+        pub mod baz {
+            pub struct FooBarBaz;
+        }
+    }
+}
+use foo::{bar::{$0}}
+"#,
+        expect![[r#"
+            kw self
+            md baz
+        "#]],
+    );
+}
+
+#[test]
+fn plain_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+use foo::$0
+
+mod foo {
+    struct Private;
+    pub struct Foo;
+}
+struct Bar;
+"#,
+        expect![[r#"
+            kw self
+            st Foo
+        "#]],
+    );
+}
+
+#[test]
+fn self_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+use self::$0
+
+mod foo {}
+struct Bar;
+"#,
+        expect![[r#"
+            kw self
+            md foo
+            st Bar
+        "#]],
+    );
+}
+
+#[test]
+fn super_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+mod bar {
+    use super::$0
+}
+
+mod foo {}
+struct Bar;
+"#,
+        expect![[r#"
+            kw self
+            kw super::
+            st Bar
+            md bar
+            md foo
+        "#]],
+    );
+}
+
+#[test]
+fn super_super_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+mod a {
+    const A: usize = 0;
+    mod b {
+        const B: usize = 0;
+        mod c { use super::super::$0 }
+    }
+}
+"#,
+        expect![[r#"
+            kw self
+            kw super::
+            md b
+            ct A
+        "#]],
+    );
+}
+
+#[test]
+fn crate_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+use crate::$0
+
+mod foo {}
+struct Bar;
+"#,
+        expect![[r#"
+            kw self
+            md foo
+            st Bar
+        "#]],
+    );
+}
+
+#[test]
+fn extern_crate_qualified_use_tree() {
+    // FIXME: self shouldn't be here
+    check(
+        r#"
+//- /lib.rs crate:main deps:other_crate
+use other_crate::$0
+//- /other_crate/lib.rs crate:other_crate
+pub struct Foo;
+pub mod foo {}
+"#,
+        expect![[r#"
+            kw self
+            st Foo
+            md foo
+        "#]],
+    );
+}
+
+#[test]
+fn pub_use_tree() {
+    check(
+        r#"
+pub struct X;
+pub mod bar {}
+pub use $0;
+"#,
+        expect![[r#"
+            kw crate::
+            kw self
+            kw super::
+            md bar
+        "#]],
+    );
+}