ensure latest log text is correct when appended

test/append-test-log.c

@@ -57,6 +57,24 @@ append_to_empty(TestState *s)
 		test.first_log,
 		0
 	);
+
+	// log should say "foo"
+	print("\t\t\ttext\n");
+	chk_str_eq(
+		s,
+		"ERROR: append_test_log(): append to empty: first_log: text:",
+		test.first_log->text,
+		"foo"
+	);
+
+	// last_log should match first_log
+	print("\t\tlast_log\n");
+	chk_ptr_eq(
+		s,
+		"ERROR: append_test_log(): append to empty: last_log:",
+		test.last_log,
+		test.first_log
+	);
 }
 
 //jl

test/util.c

@@ -113,6 +113,7 @@ static void chk_TestState_ptr_eq(
 decl_test(chk_int_eq_test); // ensure ints are equal
 decl_test(chk_ptr_eq_test); // ensure pointers are equal
 decl_test(chk_ptr_ne_test); // ensure pointers are not equal
+decl_test(chk_str_eq_test); // ensure strings are equal
 
 // Public Functions
 
@@ -198,6 +199,24 @@ chk_ptr_ne(
 	s->ptr = old_ptr;
 }
 
+void
+chk_str_eq(
+	TestState *s,
+	const char *context,
+	const char *actual,
+	const char *expected
+)
+{
+	void *old_ptr = s->ptr;
+	ComparePtrs cp;
+	cp.context = context;
+	cp.chk_val = actual;
+	cp.ref_val = expected;
+	s->ptr = &cp;
+	run_test(s, chk_str_eq_test);
+	s->ptr = old_ptr;
+}
+
 // Local Functions
 
 static void
@@ -349,4 +368,17 @@ def_test(chk_ptr_ne_test, s)
 	return test_failure;
 }
 
+def_test(chk_str_eq_test, s)
+{
+	const ComparePtrs *cp = s->ptr;
+	if (!strcmp(cp->chk_val, cp->ref_val)) return test_success;
+	char str[STR_BUF_SIZE];
+	append_test_log(s, cp->context);
+	snprintf(str, STR_BUF_SIZE, "\texpected: %s", cp->ref_val);
+	append_test_log(s, str);
+	snprintf(str, STR_BUF_SIZE, "\tactual: %s", cp->ref_val);
+	append_test_log(s, str);
+	return test_failure;
+}
+
 //jl

test/util.h

@@ -60,4 +60,12 @@ extern void chk_ptr_ne(
 	const void * // the prohibited value
 );
 
+// ensure two strings are equal
+extern void chk_str_eq(
+	TestState *,
+	const char *, // the error context
+	const char *, // the actual value
+	const char * // the expected value
+);
+
 //jl