Add readline tests

test/common/readline/readline.c

@@ -0,0 +1,61 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdlib.h>
+#include <stdio.h>
+#include "tests.h"
+#include "readline.h"
+
+int __wrap_fgetc(FILE *stream) {
+	return mock_type(int);
+}
+
+static void prep_string(const char *str) {
+	while (*str) {
+		will_return(__wrap_fgetc, *str++);
+	}
+}
+
+static void test_eof_line_ending(void **state) {
+	prep_string("hello");
+	will_return(__wrap_fgetc, EOF);
+	char *line = read_line(NULL);
+	assert_string_equal(line, "hello");
+	free(line);
+}
+
+static void test_newline(void **state) {
+	prep_string("hello\n");
+	char *line = read_line(NULL);
+	assert_string_equal(line, "hello");
+	free(line);
+}
+
+static void test_continuation(void **state) {
+	prep_string("hello \\\nworld");
+	will_return(__wrap_fgetc, EOF);
+	char *line = read_line(NULL);
+	assert_string_equal(line, "hello world");
+	free(line);
+}
+
+static void test_expand_buffer(void **state) {
+	const char *test = "This is a very very long string. "
+		"This string is so long that it may in fact be greater "
+		"than 128 bytes (or octets) in length, which is suitable "
+		"for triggering a realloc";
+	prep_string(test);
+	will_return(__wrap_fgetc, EOF);
+	char *line = read_line(NULL);
+	assert_string_equal(line, test);
+	free(line);
+	assert_int_equal(realloc_calls(), 1);
+}
+
+int main(int argc, char **argv) {
+	const struct CMUnitTest tests[] = {
+		cmocka_unit_test(test_eof_line_ending),
+		cmocka_unit_test(test_newline),
+		cmocka_unit_test(test_continuation),
+		cmocka_unit_test(test_expand_buffer),
+	};
+	return cmocka_run_group_tests(tests, reset_mem_wrappers, NULL);
+}