From 076d78a63cb71207b0bf5675097fa00df1c3300f Mon Sep 17 00:00:00 2001
From: Richard Russon <rich@flatcap.org>
Date: Mon, 29 Apr 2019 14:46:56 +0100
Subject: [PATCH] test: add email tests for degenerate cases

---
 test/email/mutt_email_cmp_strict.c | 10 ++++++++++
 test/email/mutt_email_free.c       | 11 +++++++++++
 test/email/mutt_email_size.c       |  4 ++++
 3 files changed, 25 insertions(+)

diff --git a/test/email/mutt_email_cmp_strict.c b/test/email/mutt_email_cmp_strict.c
index 94b5642ff..a3ce044c0 100644
--- a/test/email/mutt_email_cmp_strict.c
+++ b/test/email/mutt_email_cmp_strict.c
@@ -30,4 +30,14 @@
 void test_mutt_email_cmp_strict(void)
 {
   // bool mutt_email_cmp_strict(const struct Email *e1, const struct Email *e2);
+
+  {
+    struct Email email = { 0 };
+    TEST_CHECK(!mutt_email_cmp_strict(NULL, &email));
+  }
+
+  {
+    struct Email email = { 0 };
+    TEST_CHECK(!mutt_email_cmp_strict(&email, NULL));
+  }
 }
diff --git a/test/email/mutt_email_free.c b/test/email/mutt_email_free.c
index 15f01ed09..e8aa4b60d 100644
--- a/test/email/mutt_email_free.c
+++ b/test/email/mutt_email_free.c
@@ -30,4 +30,15 @@
 void test_mutt_email_free(void)
 {
   // void mutt_email_free(struct Email **e);
+
+  {
+    mutt_email_free(NULL);
+    TEST_CHECK_(1, "mutt_email_free(NULL)");
+  }
+
+  {
+    struct Email *email = NULL;
+    mutt_email_free(&email);
+    TEST_CHECK_(1, "mutt_email_free(&email)");
+  }
 }
diff --git a/test/email/mutt_email_size.c b/test/email/mutt_email_size.c
index 41b623439..4842910b7 100644
--- a/test/email/mutt_email_size.c
+++ b/test/email/mutt_email_size.c
@@ -30,4 +30,8 @@
 void test_mutt_email_size(void)
 {
   // size_t mutt_email_size(const struct Email *e);
+
+  {
+    TEST_CHECK(mutt_email_size(NULL) == 0);
+  }
 }
-- 
2.50.0