Added tests to merge files and branches with whitespace problems and fixes

tests/merge/files.c

@@ -173,3 +173,79 @@ void test_merge_files__automerge_from_index(void)
 
 	git_merge_file_result_free(&result);
 }
+
+void test_merge_files__automerge_whitespace_eol(void)
+{
+	git_merge_file_input ancestor = GIT_MERGE_FILE_INPUT_INIT,
+		ours = GIT_MERGE_FILE_INPUT_INIT,
+		theirs = GIT_MERGE_FILE_INPUT_INIT;
+	git_merge_file_options opts = GIT_MERGE_FILE_OPTIONS_INIT;
+	git_merge_file_result result = {0};
+	const char *expected = "Zero\n1\n2\n3\n4\n5\n6\n7\n8\n9\nTen\n";
+
+	ancestor.ptr = "0 \n1\n2\n3\n4\n5\n6\n7\n8\n9\n10 \n";
+	ancestor.size = strlen(ancestor.ptr);
+	ancestor.path = "testfile.txt";
+	ancestor.mode = 0100755;
+
+	ours.ptr = "Zero\n1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n";
+	ours.size = strlen(ours.ptr);
+	ours.path = "testfile.txt";
+	ours.mode = 0100755;
+
+	theirs.ptr = "0\n1\n2\n3\n4\n5\n6\n7\n8\n9\nTen\n";
+	theirs.size = strlen(theirs.ptr);
+	theirs.path = "testfile.txt";
+	theirs.mode = 0100755;
+
+	opts.whitespace_flags |= GIT_MERGE_FILE_IGNORE_WHITESPACE_EOL;
+	cl_git_pass(git_merge_file(&result, &ancestor, &ours, &theirs, &opts));
+
+	cl_assert_equal_i(1, result.automergeable);
+
+	cl_assert_equal_s("testfile.txt", result.path);
+	cl_assert_equal_i(0100755, result.mode);
+
+	cl_assert_equal_i(strlen(expected), result.len);
+	cl_assert_equal_strn(expected, result.ptr, result.len);
+
+	git_merge_file_result_free(&result);
+}
+
+void test_merge_files__automerge_whitespace_change(void)
+{
+	git_merge_file_input ancestor = GIT_MERGE_FILE_INPUT_INIT,
+		ours = GIT_MERGE_FILE_INPUT_INIT,
+		theirs = GIT_MERGE_FILE_INPUT_INIT;
+	git_merge_file_options opts = GIT_MERGE_FILE_OPTIONS_INIT;
+	git_merge_file_result result = {0};
+	const char *expected = "Zero\n1\n2\n3\n4\n5 XXX\n6 YYY\n7\n8\n9\nTen\n";
+
+	ancestor.ptr = "0\n1\n2\n3\n4\n5 XXX\n6YYY\n7\n8\n9\n10\n";
+	ancestor.size = strlen(ancestor.ptr);
+	ancestor.path = "testfile.txt";
+	ancestor.mode = 0100755;
+
+	ours.ptr = "Zero\n1\n2\n3\n4\n5 XXX\n6 YYY\n7\n8\n9\n10\n";
+	ours.size = strlen(ours.ptr);
+	ours.path = "testfile.txt";
+	ours.mode = 0100755;
+
+	theirs.ptr = "0\n1\n2\n3\n4\n5 XXX\n6  YYY\n7\n8\n9\nTen\n";
+	theirs.size = strlen(theirs.ptr);
+	theirs.path = "testfile.txt";
+	theirs.mode = 0100755;
+
+	opts.whitespace_flags |= GIT_MERGE_FILE_IGNORE_WHITESPACE_CHANGE;
+	cl_git_pass(git_merge_file(&result, &ancestor, &ours, &theirs, &opts));
+
+	cl_assert_equal_i(1, result.automergeable);
+
+	cl_assert_equal_s("testfile.txt", result.path);
+	cl_assert_equal_i(0100755, result.mode);
+
+	cl_assert_equal_i(strlen(expected), result.len);
+	cl_assert_equal_strn(expected, result.ptr, result.len);
+
+	git_merge_file_result_free(&result);
+}

tests/merge/trees/whitespace.c

+#include "clar_libgit2.h"
+#include "git2/repository.h"
+#include "git2/merge.h"
+#include "buffer.h"
+#include "merge.h"
+#include "../merge_helpers.h"
+#include "fileops.h"
+
+static git_repository *repo;
+
+#define TEST_REPO_PATH "merge-whitespace"
+
+#define BRANCH_A_EOL  "branch_a_eol"
+#define BRANCH_B_EOL  "branch_b_eol"
+
+#define BRANCH_A_CHANGE  "branch_a_change"
+#define BRANCH_B_CHANGE  "branch_b_change"
+
+// Fixture setup and teardown
+void test_merge_trees_whitespace__initialize(void)
+{
+	repo = cl_git_sandbox_init(TEST_REPO_PATH);
+}
+
+void test_merge_trees_whitespace__cleanup(void)
+{
+	cl_git_sandbox_cleanup();
+}
+
+void test_merge_trees_whitespace__conflict(void)
+{
+	git_index *index;
+	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
+
+	struct merge_index_entry merge_index_entries[] = {
+		{ 0100644, "4026a6c83f39c56881c9ac62e7582db9e3d33a4f", 1, "test.txt" },
+		{ 0100644, "c3b1fb31424c98072542cc8e42b48c92e52f494a", 2, "test.txt" },
+		{ 0100644, "262f67de0de2e535a59ae1bc3c739601e98c354d", 3, "test.txt" },
+	};
+
+	cl_git_pass(merge_trees_from_branches(&index, repo, BRANCH_A_EOL, BRANCH_B_EOL, &opts));
+
+	cl_assert(merge_test_index(index, merge_index_entries, 3));
+
+	git_index_free(index);
+}
+
+void test_merge_trees_whitespace__eol(void)
+{
+	git_index *index;
+	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
+
+	struct merge_index_entry merge_index_entries[] = {
+		{ 0100644, "ee3c2aac8e03224c323b58ecb1f9eef616745467", 0, "test.txt" },
+	};
+
+	opts.whitespace_flags |= GIT_MERGE_FILE_IGNORE_WHITESPACE_EOL;
+
+	cl_git_pass(merge_trees_from_branches(&index, repo, BRANCH_A_EOL, BRANCH_B_EOL, &opts));
+
+	cl_assert(merge_test_index(index, merge_index_entries, 1));
+
+	git_index_free(index);
+}
+
+void test_merge_trees_whitespace__change(void)
+{
+	git_index *index;
+	git_merge_options opts = GIT_MERGE_OPTIONS_INIT;
+
+	struct merge_index_entry merge_index_entries[] = {
+		{ 0100644, "a827eab4fd66ab37a6ebcfaa7b7e341abfd55947", 0, "test.txt" },
+	};
+
+	opts.whitespace_flags |= GIT_MERGE_FILE_IGNORE_WHITESPACE_CHANGE;
+
+	cl_git_pass(merge_trees_from_branches(&index, repo, BRANCH_A_CHANGE, BRANCH_B_CHANGE, &opts));
+
+	cl_assert(merge_test_index(index, merge_index_entries, 1));
+
+	git_index_free(index);
+}

tests/resources/merge-whitespace/.gitted/HEAD

+ref: refs/heads/master

tests/resources/merge-whitespace/.gitted/config

+[core]
+	repositoryformatversion = 0
+	filemode = true
+	bare = false
+	logallrefupdates = true
+	ignorecase = true
+	precomposeunicode = true

tests/resources/merge-whitespace/.gitted/refs/heads/branch_a_change

+d95182053c31f8aa09df4fa225f4e668c5320b59

tests/resources/merge-whitespace/.gitted/refs/heads/branch_a_eol

+9c5362069759fb37ae036cef6e4b2f95c6c5eaab

tests/resources/merge-whitespace/.gitted/refs/heads/branch_b_change

+b2a69114f4897109fedf1aafea363cb2d2557029

tests/resources/merge-whitespace/.gitted/refs/heads/branch_b_eol

+bfe4ea5805af22a5b194259bda6f5f634486f891

tests/resources/merge-whitespace/.gitted/refs/heads/master

+1189e10a62aadf2fea8cd018afb52c1980f40b4f

tests/resources/merge-whitespace/test.txt

+0
+1
+2
+3
+4
+5 XXX
+6
+7
+8
+9
+10