Add assertion context manager to TestAppContext and convert existing vim tests to use neovim backed test context

crates/vim/src/test_contexts/vim_binding_test_context.rs

@@ -1,69 +0,0 @@
-use std::ops::{Deref, DerefMut};
-
-use crate::*;
-
-use super::VimTestContext;
-
-pub struct VimBindingTestContext<'a, const COUNT: usize> {
-    cx: VimTestContext<'a>,
-    keystrokes_under_test: [&'static str; COUNT],
-    mode_before: Mode,
-    mode_after: Mode,
-}
-
-impl<'a, const COUNT: usize> VimBindingTestContext<'a, COUNT> {
-    pub fn new(
-        keystrokes_under_test: [&'static str; COUNT],
-        mode_before: Mode,
-        mode_after: Mode,
-        cx: VimTestContext<'a>,
-    ) -> Self {
-        Self {
-            cx,
-            keystrokes_under_test,
-            mode_before,
-            mode_after,
-        }
-    }
-
-    pub fn binding<const NEW_COUNT: usize>(
-        self,
-        keystrokes_under_test: [&'static str; NEW_COUNT],
-    ) -> VimBindingTestContext<'a, NEW_COUNT> {
-        VimBindingTestContext {
-            keystrokes_under_test,
-            cx: self.cx,
-            mode_before: self.mode_before,
-            mode_after: self.mode_after,
-        }
-    }
-
-    pub fn mode_after(mut self, mode_after: Mode) -> Self {
-        self.mode_after = mode_after;
-        self
-    }
-
-    pub fn assert(&mut self, initial_state: &str, state_after: &str) {
-        self.cx.assert_binding(
-            self.keystrokes_under_test,
-            initial_state,
-            self.mode_before,
-            state_after,
-            self.mode_after,
-        )
-    }
-}
-
-impl<'a, const COUNT: usize> Deref for VimBindingTestContext<'a, COUNT> {
-    type Target = VimTestContext<'a>;
-
-    fn deref(&self) -> &Self::Target {
-        &self.cx
-    }
-}
-
-impl<'a, const COUNT: usize> DerefMut for VimBindingTestContext<'a, COUNT> {
-    fn deref_mut(&mut self) -> &mut Self::Target {
-        &mut self.cx
-    }
-}