Add Bazel support for unit tests

Author: Fædon Jóhannes Sinis

.bazelrc

@@ -0,0 +1,11 @@
+# bzlmod enables access to the Bazel Central Registry.
+# See https://registry.bazel.build/ for more details.
+# Enable Bzlmod for every Bazel command.
+# https://bazel.build/external/migration#enable-bzlmod
+common --enable_bzlmod
+
+build --cxxopt=-std=c++20
+
+# Display details on failing tests to stdout.
+# See https://bazel.build/docs/user-manual#test-output for documentation.
+test --test_output=errors

BUILD.bazel

@@ -24,3 +24,28 @@ cc_library(
         "@nlohmann_json//:json",
     ],
 )
+
+cc_library(
+    name = "polyscope_mock",
+    srcs = glob(
+        ["src/**/*.cpp"],
+    ),
+    hdrs = glob(
+        [
+            "include/**/*.h",
+            "include/**/*.ipp",
+        ],
+    ),
+    defines = [
+        "POLYSCOPE_BACKEND_OPENGL_MOCK_ENABLED",
+    ],
+    strip_include_prefix = "include",
+    deps = [
+        "//deps/MarchingCubeCpp:marching_cube",
+        "//deps/glad",
+        "//deps/stb",
+        "@glm",
+        "@imgui-1.86",
+        "@nlohmann_json//:json",
+    ],
+)

test/BUILD.bazel

@@ -0,0 +1,18 @@
+cc_library(
+    name = "test_lib",
+    hdrs = glob(["include/*.h"]),
+    includes = ["."],
+    strip_include_prefix = "include",
+)
+
+cc_test(
+    name = "polyscope_tests",
+    srcs = glob([
+        "src/*.cpp",
+    ]),
+    deps = [
+        ":test_lib",
+        "//:polyscope_mock",
+        "@com_google_googletest//:gtest_main",
+    ],
+)