[igt-dev] [PATCH i-g-t 3/5] lib/tests/igt_audio: add test with an extra frequency

[Simon Ser <simon.ser@intel.com>]

Make sure it fails.

Signed-off-by: Simon Ser <simon.ser@intel.com>
---
 lib/tests/igt_audio.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/lib/tests/igt_audio.c b/lib/tests/igt_audio.c
index 7b068c255973..0f1c39d93728 100644
--- a/lib/tests/igt_audio.c
+++ b/lib/tests/igt_audio.c
@@ -36,6 +36,8 @@ static const int test_freqs[] = { 300, 700, 5000 };
 
 static const size_t test_freqs_len = sizeof(test_freqs) / sizeof(test_freqs[0]);
 
+#define TEST_EXTRA_FREQ 500
+
 static void test_signal_detect_verbatim(struct audio_signal *signal)
 {
 	double buf[BUFFER_LEN];
@@ -89,6 +91,26 @@ static void test_signal_detect_missing(struct audio_signal *signal)
 	igt_assert(!ok);
 }
 
+static void test_signal_detect_extra(struct audio_signal *signal)
+{
+	double buf[BUFFER_LEN];
+	struct audio_signal *extra;
+	bool ok;
+	size_t i;
+
+	/* Add an extra, unexpected frequency */
+	extra = audio_signal_init(CHANNELS, SAMPLING_RATE);
+	for (i = 0; i < test_freqs_len; i++) {
+		audio_signal_add_frequency(extra, test_freqs[i], 0);
+	}
+	audio_signal_add_frequency(extra, TEST_EXTRA_FREQ, 0);
+	audio_signal_synthesize(extra);
+
+	audio_signal_fill(extra, buf, BUFFER_LEN / CHANNELS);
+	ok = audio_signal_detect(signal, SAMPLING_RATE, 0, buf, BUFFER_LEN);
+	igt_assert(!ok);
+}
+
 igt_main
 {
 	struct audio_signal *signal;
@@ -121,6 +143,9 @@ igt_main
 		igt_subtest("signal-detect-missing")
 			test_signal_detect_missing(signal);
 
+		igt_subtest("signal-detect-extra")
+			test_signal_detect_extra(signal);
+
 		igt_fixture {
 			audio_signal_fini(signal);
 		}
-- 
2.21.0

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