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+;;; test-video-audio-recording-test-mic.el --- Tests for cj/recording-test-mic -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Unit tests for cj/recording-test-mic function.
+;; Tests microphone testing functionality.
+
+;;; Code:
+
+(require 'ert)
+
+;; Stub dependencies before loading the module
+(defvar cj/custom-keymap (make-sparse-keymap)
+  "Stub keymap for testing.")
+
+;; Now load the actual production module
+(require 'video-audio-recording)
+
+;;; Setup and Teardown
+
+(defun test-mic-setup ()
+  "Reset device variables before each test."
+  (setq cj/recording-mic-device nil))
+
+(defun test-mic-teardown ()
+  "Clean up device variables after each test."
+  (setq cj/recording-mic-device nil))
+
+;;; Normal Cases
+
+(ert-deftest test-video-audio-recording-test-mic-normal-creates-temp-wav-file ()
+  "Test that function creates temp file with .wav extension."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device "test-mic-device")
+        (let ((temp-file nil))
+          ;; Mock make-temp-file to capture filename
+          (cl-letf (((symbol-function 'make-temp-file)
+                     (lambda (prefix _dir-flag suffix)
+                       (setq temp-file (concat prefix "12345" suffix))
+                       temp-file))
+                    ((symbol-function 'shell-command)
+                     (lambda (_cmd) 0)))
+            (cj/recording-test-mic)
+            (should (string-match-p "\\.wav$" temp-file)))))
+    (test-mic-teardown)))
+
+(ert-deftest test-video-audio-recording-test-mic-normal-runs-ffmpeg-command ()
+  "Test that function runs ffmpeg command with configured mic device."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device "test-mic-device")
+        (let ((commands nil))
+          ;; Mock shell-command to capture all commands
+          (cl-letf (((symbol-function 'shell-command)
+                     (lambda (cmd) (push cmd commands) 0)))
+            (cj/recording-test-mic)
+            (should (= 2 (length commands)))
+            ;; First command should be ffmpeg (stored last in list due to push)
+            (let ((ffmpeg-cmd (cadr commands)))
+              (should (stringp ffmpeg-cmd))
+              (should (string-match-p "ffmpeg" ffmpeg-cmd))
+              (should (string-match-p "test-mic-device" ffmpeg-cmd))
+              (should (string-match-p "-t 5" ffmpeg-cmd))))))
+    (test-mic-teardown)))
+
+(ert-deftest test-video-audio-recording-test-mic-normal-runs-ffplay-for-playback ()
+  "Test that function runs ffplay for playback."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device "test-mic-device")
+        (let ((commands nil))
+          ;; Capture all shell commands
+          (cl-letf (((symbol-function 'shell-command)
+                     (lambda (cmd) (push cmd commands) 0)))
+            (cj/recording-test-mic)
+            (should (= 2 (length commands)))
+            ;; Second command should be ffplay
+            (should (string-match-p "ffplay" (car commands)))
+            (should (string-match-p "-autoexit" (car commands))))))
+    (test-mic-teardown)))
+
+(ert-deftest test-video-audio-recording-test-mic-normal-displays-messages ()
+  "Test that function displays appropriate messages to user."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device "test-mic-device")
+        (let ((messages nil))
+          ;; Capture messages
+          (cl-letf (((symbol-function 'message)
+                     (lambda (fmt &rest args) (push (apply #'format fmt args) messages)))
+                    ((symbol-function 'shell-command)
+                     (lambda (_cmd) 0)))
+            (cj/recording-test-mic)
+            (should (>= (length messages) 3))
+            ;; Check for recording message
+            (should (cl-some (lambda (msg) (string-match-p "Recording.*SPEAK NOW" msg)) messages))
+            ;; Check for playback message
+            (should (cl-some (lambda (msg) (string-match-p "Playing back" msg)) messages))
+            ;; Check for complete message
+            (should (cl-some (lambda (msg) (string-match-p "complete" msg)) messages)))))
+    (test-mic-teardown)))
+
+;;; Error Cases
+
+(ert-deftest test-video-audio-recording-test-mic-error-no-mic-configured-signals-error ()
+  "Test that function signals user-error when mic device is not configured."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device nil)
+        (should-error (cj/recording-test-mic) :type 'user-error))
+    (test-mic-teardown)))
+
+(ert-deftest test-video-audio-recording-test-mic-error-message-mentions-setup ()
+  "Test that error message guides user to run setup."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device nil)
+        (condition-case err
+            (cj/recording-test-mic)
+          (user-error
+           (should (string-match-p "C-; r c" (error-message-string err))))))
+    (test-mic-teardown)))
+
+(ert-deftest test-video-audio-recording-test-mic-error-ffmpeg-failure-handled ()
+  "Test that ffmpeg command failure is handled gracefully."
+  (test-mic-setup)
+  (unwind-protect
+      (progn
+        (setq cj/recording-mic-device "test-mic-device")
+        ;; Mock shell-command to fail
+        (cl-letf (((symbol-function 'shell-command)
+                   (lambda (_cmd) 1)))  ;; Non-zero exit code
+          ;; Should complete without crashing (ffmpeg errors are ignored)
+          ;; No error is raised - function just completes
+          (cj/recording-test-mic)
+          ;; Test passes if we get here
+          (should t)))
+    (test-mic-teardown)))
+
+(provide 'test-video-audio-recording-test-mic)
+;;; test-video-audio-recording-test-mic.el ends here