Add some tests for one time mode

annotation-processors/src/main/kotlin/com/intellij/vim/annotations/CommandOrMotion.kt

@@ -44,7 +44,7 @@ enum class Mode(val abbrev: Char) {
   OP_PENDING('O'),
 
   /**
-   * Indicates this key mapping applies to Insert mode
+   * Indicates this key mapping applies to Insert or Replace modes
    */
   INSERT('I'),
 

src/test/java/org/jetbrains/plugins/ideavim/action/change/insert/InsertSingleCommandActionTest.kt

@@ -12,14 +12,38 @@ import com.maddyhome.idea.vim.state.mode.Mode
 import org.jetbrains.plugins.ideavim.VimTestCase
 import org.junit.jupiter.api.Test
 
-class InsertSingleCommandActionTest : VimTestCase() {
+class InsertSingleCommandActionTest : SingleCommandActionTest() {
+  override val command: String = "i"
+  override val mode: Mode = Mode.INSERT
+}
+
+class ReplaceSingleCommandActionTest : SingleCommandActionTest() {
+  override val command: String = "R"
+  override val mode: Mode = Mode.REPLACE
+}
+
+abstract class SingleCommandActionTest : VimTestCase() {
+
+  abstract val command: String
+  abstract val mode: Mode
+
+  @Test
+  fun `one operation`() {
+    doTest(
+      listOf(command, "<C-O>", "l"),
+      "I found ${c}it in a legendary land",
+      "I found i${c}t in a legendary land",
+      mode,
+    )
+  }
+
   @Test
   fun `test enter visual`() {
     doTest(
-      listOf("i", "<C-O>", "vlll", "<Esc>"),
+      listOf(command, "<C-O>", "vlll", "<Esc>"),
       "I found ${c}it in a legendary land",
       "I found it ${c}in a legendary land",
-Mode.INSERT,
+      mode,
     )
   }
 }