test: add test step in build.zig

- add all unit tests in test bundle script
- add test step

Author: nooneknowspeter

build.zig

@@ -16,11 +16,14 @@ pub fn build(b: *STD.Build) !void {
 
     // cli
     {
-        const CPPLINGS_CLI = b.addExecutable(.{ .name = "cpplings_cli", .root_module = b.createModule(.{
-            .target = TARGET,
-            .optimize = OPTIMIZE,
-            .root_source_file = b.path("src/main.zig"),
-        }) });
+        const CPPLINGS_CLI = b.addExecutable(.{
+            .name = "cpplings_cli",
+            .root_module = b.createModule(.{
+                .target = TARGET,
+                .optimize = OPTIMIZE,
+                .root_source_file = b.path("src/main.zig"),
+            }),
+        });
 
         b.installArtifact(CPPLINGS_CLI);
         const CPPLINGS_CLI_ARTIFIACT = b.addRunArtifact(CPPLINGS_CLI);
@@ -36,6 +39,23 @@ pub fn build(b: *STD.Build) !void {
         }
     }
 
+    // tests
+    {
+        const CPPLINGS_CLI_TESTS = b.addTest(.{
+            .name = "cpplings_tests",
+            .root_module = b.createModule(.{
+                .target = TARGET,
+                .optimize = OPTIMIZE,
+                .root_source_file = b.path("src/test.zig"),
+            }),
+        });
+
+        const CPPLINGS_CLI_TESTS_ARTIFACT = b.addRunArtifact(CPPLINGS_CLI_TESTS);
+
+        const CPPLINGS_CLI_TESTS_STEP = b.step("tests", "Run cpplings tests");
+        CPPLINGS_CLI_TESTS_STEP.dependOn(&CPPLINGS_CLI_TESTS_ARTIFACT.step);
+    }
+
     // exercises
     {
         const COMPILER_FLAGS = [_][]const u8{ "-std=c++23", "-Wall", "-Werror", "-Wextra" };

src/test.zig

@@ -1,9 +1,11 @@
 const STD = @import("std");
 
-const CLI = @import("cli.zig");
-const PATCH = @import("patch.zig");
-const UTIL = @import("util.zig");
-
 test "run all tests" {
     STD.testing.refAllDecls(@This());
+
+    comptime {
+        _ = @import("cli.zig");
+        _ = @import("patch.zig");
+        _ = @import("util.zig");
+    }
 }