Run gdb on test step using build.zig

build.zig

const std = @import("std");
const builtin = @import("builtin");
const Builder = std.build.Builder;

pub fn build(b: *Builder) !void {
    const target = b.standardTargetOptions(.{});
    const optimize = b.standardOptimizeOption(.{});

    const main_tests = b.addTest(.{
        .root_source_file = .{ .path = "main.zig" },
        .target = target,
        .optimize = optimize,
    });

    // run test step
    const run_tests = b.addRunArtifact(main_tests);
    const test_step = b.step("test", "Run unit tests");
    test_step.dependOn(&run_tests.step);

    // debug test step
    const gdb_command = b.addSystemCommand(&[_][]const u8{ "gdb" });
    gdb_command.addFileArg(main_tests.getEmittedBin());
    gdb_command.step.dependOn(&main_tests.step);
    const debug_test_step = b.step("debug_test", "Run gdb on tests");
    debug_test_step.dependOn(&gdb_command.step);
}