Makefiles & Automated Testing

CC     := gcc
CFLAGS := -Wall -Wextra -g -std=c11
TARGET := hello

# Default target: build the executable
all: $(TARGET)

$(TARGET): hello.c
	$(CC) $(CFLAGS) -o $@ $^

.PHONY: clean
clean:
	rm -f $(TARGET)

CC     := gcc
CFLAGS := -Wall -Wextra -Werror -g -std=c11
TARGET := program
SRCS   := main.c utils.c parser.c
OBJS   := $(SRCS:.c=.o)   # replace .c with .o in SRCS list

all: $(TARGET)

# Link all object files into the final executable
$(TARGET): $(OBJS)
	$(CC) $(CFLAGS) -o $@ $^

# Generic pattern rule: compile any .c to .o
%.o: %.c
	$(CC) $(CFLAGS) -c $<

.PHONY: clean test

clean:
	rm -f $(TARGET) $(OBJS)

test: $(TARGET)
	./test_script.sh

#!/bin/bash
# test_script.sh — run program and compare output to expected

PASS=0
FAIL=0

run_test() {
    local test_name="$1"
    local input_file="$2"
    local expected_file="$3"

    # Run program with input, capture output
    actual=$(./program < "$input_file" 2>/dev/null)
    expected=$(cat "$expected_file")

    if [ "$actual" = "$expected" ]; then
        echo "PASS: $test_name"
        PASS=$((PASS + 1))
    else
        echo "FAIL: $test_name"
        echo "  Expected: $expected"
        echo "  Got:      $actual"
        FAIL=$((FAIL + 1))
    fi
}

run_test "basic_input"  tests/input1.txt  tests/expected1.txt
run_test "empty_input"  tests/input2.txt  tests/expected2.txt
run_test "large_input"  tests/input3.txt  tests/expected3.txt

echo ""
echo "Results: $PASS passed, $FAIL failed"
[ $FAIL -eq 0 ]   # exit 0 on success, nonzero on failure

/* IMPORTANT: these three includes must come before cmocka.h */
#include <stdarg.h>
#include <stddef.h>
#include <setjmp.h>
#include <cmocka.h>

/* Test function — must have this exact signature */
static void test_add(void **state) {
    (void)state;  /* unused */
    assert_int_equal(add(2, 3), 5);
    assert_int_equal(add(-1, 1), 0);
    assert_int_equal(add(0, 0), 0);
}

int main(void) {
    const struct CMUnitTest tests[] = {
        cmocka_unit_test(test_add),
    };
    return cmocka_run_group_tests(tests, NULL, NULL);
}