Add c/hamming

c/hamming/test/test_hamming.c

@@ -0,0 +1,96 @@
+#include "vendor/unity.h"
+#include "../src/hamming.h"
+
+void setUp(void)
+{
+}
+
+void tearDown(void)
+{
+}
+
+void test_empty_strands(void)
+{
+   TEST_ASSERT_EQUAL(0, compute("", ""));
+}
+
+void test_rejects_null_strand(void)
+{
+   TEST_ASSERT_EQUAL(-1, compute(NULL, "A"));
+}
+
+void test_rejects_other_null_strand(void)
+{
+   TEST_ASSERT_EQUAL(-1, compute("A", NULL));
+}
+
+void test_no_difference_between_identical_strands(void)
+{
+   TEST_ASSERT_EQUAL(0, compute("A", "A"));
+}
+
+void test_identical_long_strands(void)
+{
+   TEST_ASSERT_EQUAL(0, compute("GGACTGA", "GGACTGA"));
+}
+
+void test_hamming_distance_for_single_nucleotide_strand(void)
+{
+   TEST_ASSERT_EQUAL(1, compute("A", "G"));
+}
+
+void test_complete_hamming_distance_for_small_strand(void)
+{
+   TEST_ASSERT_EQUAL(2, compute("AG", "CT"));
+}
+
+void test_small_hamming_distance(void)
+{
+   TEST_ASSERT_EQUAL(1, compute("AT", "CT"));
+}
+
+void test_small_hamming_distance_in_longer_strand(void)
+{
+   TEST_ASSERT_EQUAL(1, compute("GGACG", "GGTCG"));
+}
+
+void test_rejects_extra_length_on_first_strand_when_longer(void)
+{
+   TEST_ASSERT_EQUAL(-1, compute("AAAG", "AAA"));
+}
+
+void test_rejects_extra_length_on_other_strand_when_longer(void)
+{
+   TEST_ASSERT_EQUAL(-1, compute("AAA", "AAAG"));
+}
+
+void test_large_hamming_distance(void)
+{
+   TEST_ASSERT_EQUAL(4, compute("GATACA", "GCATAA"));
+}
+
+void test_hamming_distance_in_very_long_strand(void)
+{
+   TEST_ASSERT_EQUAL(9, compute("GGACGGATTCTG", "AGGACGGATTCT"));
+}
+
+int main(void)
+{
+   UnityBegin("test/test_hamming.c");
+
+   RUN_TEST(test_empty_strands);
+   RUN_TEST(test_no_difference_between_identical_strands);
+   RUN_TEST(test_rejects_null_strand);
+   RUN_TEST(test_rejects_other_null_strand);
+   RUN_TEST(test_identical_long_strands);
+   RUN_TEST(test_hamming_distance_for_single_nucleotide_strand);
+   RUN_TEST(test_complete_hamming_distance_for_small_strand);
+   RUN_TEST(test_small_hamming_distance);
+   RUN_TEST(test_small_hamming_distance_in_longer_strand);
+   RUN_TEST(test_rejects_extra_length_on_first_strand_when_longer);
+   RUN_TEST(test_rejects_extra_length_on_other_strand_when_longer);
+   RUN_TEST(test_large_hamming_distance);
+   RUN_TEST(test_hamming_distance_in_very_long_strand);
+
+   return UnityEnd();
+}