test: add util tests

Author: nooneknowspeter

src/cli/test_util.zig

@@ -0,0 +1,51 @@
+const STD = @import("std");
+const UTIL = @import("./../cli/util.zig");
+
+fn initFSTests() !void {
+    STD.fs.cwd().access("tests/test_dir/chapter", .{}) catch {
+        try STD.fs.cwd().makePath("tests/test_dir/chapter");
+    };
+
+    STD.fs.cwd().access("tests/test_dir/chapter/test.cpp", .{}) catch {
+        var file = try STD.fs.cwd().createFile("tests/test_dir/chapter/test.cpp", .{});
+        defer file.close();
+    };
+}
+
+test "iterate test directory and filter files" {
+    try initFSTests();
+
+    var list_of_contents: STD.ArrayList([]const u8) = .empty;
+    defer list_of_contents.deinit(STD.testing.allocator);
+
+    try UTIL.iterateDirectory(STD.testing.allocator, "tests/test_dir/chapter", .{ .allow_move_contents = true, .include_filter = ".cpp", .is_print_list_of_contents = true, .move_contents_to = &list_of_contents });
+
+    try STD.testing.expect(STD.mem.eql(u8, list_of_contents.items[0], "tests/test_dir/chapter/test.cpp"));
+}
+
+test "directory tree" {
+    var allocator: STD.mem.Allocator = STD.testing.allocator;
+
+    const dir_tree: *UTIL.DIR_TREE = try allocator.create(UTIL.DIR_TREE);
+    defer allocator.destroy(dir_tree);
+
+    try dir_tree.init(allocator, ".patches/solutions");
+}
+
+test "run sub process with default arguments" {
+    var process_output: STD.ArrayList(u8) = .empty;
+    defer process_output.deinit(STD.testing.allocator);
+
+    try UTIL.runSubProcess(STD.testing.allocator, &process_output, .{});
+
+    try STD.testing.expect(STD.mem.eql(u8, process_output.items, "this is a sub-process\n"));
+}
+
+test "run hello world sub process" {
+    var process_output: STD.ArrayList(u8) = .empty;
+    defer process_output.deinit(STD.testing.allocator);
+
+    try UTIL.runSubProcess(STD.testing.allocator, &process_output, .{ .args = "echo hello world" });
+
+    try STD.testing.expect(STD.mem.eql(u8, process_output.items, "hello world\n"));
+}