1 files changed, 80 insertions, 0 deletions
diff --git a/mingling_core/src/comp/comp_ctx.rs b/mingling_core/src/comp/comp_ctx.rs
index 02e79c5..b9f9020 100644
--- a/mingling_core/src/comp/comp_ctx.rs
+++ b/mingling_core/src/comp/comp_ctx.rs
@@ -17,3 +17,83 @@ where
             .is_some_and(|arg| arg == COMPLETION_SUBCOMMAND)
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use crate::{AnyOutput, ChainProcess, Groupped, RenderResult};
+
+    /// Minimal mock collector that satisfies `C: ProgramCollect<Enum = C>`
+    /// by setting `Enum = Self`.
+    #[derive(Debug, Clone, PartialEq)]
+    struct MockCollect;
+
+    impl Groupped<MockCollect> for MockCollect {
+        fn member_id() -> MockCollect {
+            MockCollect
+        }
+    }
+
+    impl ProgramCollect for MockCollect {
+        type Enum = MockCollect;
+        type ErrorDispatcherNotFound = MockCollect;
+        type ErrorRendererNotFound = MockCollect;
+        type ResultEmpty = MockCollect;
+
+        fn build_renderer_not_found(_member_id: MockCollect) -> AnyOutput<MockCollect> {
+            unimplemented!()
+        }
+        fn build_dispatcher_not_found(_args: Vec<String>) -> AnyOutput<MockCollect> {
+            unimplemented!()
+        }
+        fn build_empty_result() -> AnyOutput<MockCollect> {
+            unimplemented!()
+        }
+        fn render(_any: AnyOutput<MockCollect>, _r: &mut RenderResult) {
+            unimplemented!()
+        }
+        fn render_help(_any: AnyOutput<MockCollect>, _r: &mut RenderResult) {
+            unimplemented!()
+        }
+        fn do_chain(_any: AnyOutput<MockCollect>) -> ChainProcess<MockCollect> {
+            unimplemented!()
+        }
+        #[cfg(feature = "comp")]
+        fn do_comp(_any: &AnyOutput<MockCollect>, _ctx: &crate::ShellContext) -> crate::Suggest {
+            unimplemented!()
+        }
+        fn has_renderer(_any: &AnyOutput<MockCollect>) -> bool {
+            unimplemented!()
+        }
+        fn has_chain(_any: &AnyOutput<MockCollect>) -> bool {
+            unimplemented!()
+        }
+
+        #[cfg(feature = "general_renderer")]
+        fn general_render(
+            _any: AnyOutput<MockCollect>,
+            _setting: &crate::GeneralRendererSetting,
+        ) -> Result<RenderResult, crate::error::GeneralRendererSerializeError> {
+            unimplemented!()
+        }
+    }
+
+    #[test]
+    fn test_is_completing_with_comp_subcommand() {
+        let program: Program<MockCollect> =
+            Program::new_with_args(["program", "__comp", "some", "args"]);
+        assert!(program.is_completing());
+    }
+
+    #[test]
+    fn test_is_completing_with_normal_subcommand() {
+        let program: Program<MockCollect> = Program::new_with_args(["program", "normal", "cmd"]);
+        assert!(!program.is_completing());
+    }
+
+    #[test]
+    fn test_is_completing_with_no_args() {
+        let program: Program<MockCollect> = Program::new_with_args(["program"]);
+        assert!(!program.is_completing());
+    }
+}