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+;;; test-video-audio-recording--get-available-mics.el --- Tests for mic discovery -*- lexical-binding: t; -*-
+
+;;; Commentary:
+;; Unit tests for cj/recording--get-available-mics.
+;; Verifies that available microphones are discovered correctly:
+;; - Monitor sources are excluded (they capture output, not input)
+;; - Muted sources are excluded
+;; - Friendly descriptions from PulseAudio are used
+
+;;; Code:
+
+(require 'ert)
+
+;; Stub dependencies before loading the module
+(defvar cj/custom-keymap (make-sparse-keymap)
+  "Stub keymap for testing.")
+
+(require 'video-audio-recording)
+
+;;; Helper
+
+(defun test-mics--make-pactl-output (sources)
+  "Build fake `pactl list sources' output from SOURCES.
+Each source is (name description mute state)."
+  (mapconcat (lambda (src)
+               (format "Source #1\n\tState: %s\n\tName: %s\n\tDescription: %s\n\tMute: %s\n"
+                       (nth 3 src) (nth 0 src) (nth 1 src) (nth 2 src)))
+             sources ""))
+
+;;; Normal Cases
+
+(ert-deftest test-video-audio-recording--get-available-mics-normal-filters-monitors ()
+  "Test that monitor sources are excluded from mic list."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("alsa_input.usb-Jabra.mono" "Jabra Mono" "no" "SUSPENDED")
+                  ("alsa_output.usb-Jabra.monitor" "Monitor of Jabra" "no" "SUSPENDED"))))))
+    (let ((mics (cj/recording--get-available-mics)))
+      (should (= 1 (length mics)))
+      (should (equal "alsa_input.usb-Jabra.mono" (car (car mics)))))))
+
+(ert-deftest test-video-audio-recording--get-available-mics-normal-filters-muted ()
+  "Test that muted sources are excluded from mic list."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("active-mic" "Active Mic" "no" "SUSPENDED")
+                  ("muted-mic" "Muted Mic" "yes" "SUSPENDED"))))))
+    (let ((mics (cj/recording--get-available-mics)))
+      (should (= 1 (length mics)))
+      (should (equal "active-mic" (car (car mics)))))))
+
+(ert-deftest test-video-audio-recording--get-available-mics-normal-uses-descriptions ()
+  "Test that friendly descriptions are returned as cdr."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("raw-device-name" "Friendly Device Name" "no" "IDLE"))))))
+    (let ((mics (cj/recording--get-available-mics)))
+      (should (equal "Friendly Device Name" (cdr (car mics)))))))
+
+(ert-deftest test-video-audio-recording--get-available-mics-normal-multiple-mics ()
+  "Test that multiple non-muted, non-monitor mics are returned."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("mic-a" "Jabra Mono" "no" "SUSPENDED")
+                  ("mic-b" "Built-in" "no" "IDLE")
+                  ("alsa_output.jabra.monitor" "Monitor of Jabra" "no" "SUSPENDED")
+                  ("muted-mic" "Muted Mic" "yes" "SUSPENDED"))))))
+    (let ((mics (cj/recording--get-available-mics)))
+      (should (= 2 (length mics))))))
+
+;;; Boundary Cases
+
+(ert-deftest test-video-audio-recording--get-available-mics-boundary-empty-output ()
+  "Test that empty pactl output returns empty list."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd) "")))
+    (should (null (cj/recording--get-available-mics)))))
+
+(ert-deftest test-video-audio-recording--get-available-mics-boundary-all-monitors ()
+  "Test that if all sources are monitors, returns empty list."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("sink-a.monitor" "Monitor A" "no" "SUSPENDED")
+                  ("sink-b.monitor" "Monitor B" "no" "SUSPENDED"))))))
+    (should (null (cj/recording--get-available-mics)))))
+
+(ert-deftest test-video-audio-recording--get-available-mics-boundary-all-muted ()
+  "Test that if all non-monitor sources are muted, returns empty list."
+  (cl-letf (((symbol-function 'shell-command-to-string)
+             (lambda (_cmd)
+               (test-mics--make-pactl-output
+                '(("muted-a" "Mic A" "yes" "SUSPENDED")
+                  ("muted-b" "Mic B" "yes" "SUSPENDED"))))))
+    (should (null (cj/recording--get-available-mics)))))
+
+(provide 'test-video-audio-recording--get-available-mics)
+;;; test-video-audio-recording--get-available-mics.el ends here