tests: add missing test files (#1056)

Also adding back a couple of test files that I wrote but missed adding
in previous PRs:

* #1051
* #1047

Signed-off-by: Henry Schreiner <henryschreineriii@gmail.com>

Author: henryiii

tests/test_dynamic_metadata_unit.py

@@ -0,0 +1,66 @@
+from scikit_build_core.builder._load_provider import process_dynamic_metadata
+
+
+def test_template_basic() -> None:
+    pyproject = process_dynamic_metadata(
+        {
+            "name": "test",
+            "version": "0.1.0",
+            "dynamic": ["requires-python"],
+        },
+        {
+            "requires-python": {
+                "provider": "scikit_build_core.metadata.template",
+                "result": ">={project[version]}",
+            },
+        },
+    )
+
+    assert pyproject["requires-python"] == ">=0.1.0"
+
+
+def test_template_needs() -> None:
+    # These are intentionally out of order to test the order of processing
+    pyproject = process_dynamic_metadata(
+        {
+            "name": "test",
+            "version": "0.1.0",
+            "dynamic": ["requires-python", "license", "readme"],
+        },
+        {
+            "license": {
+                "provider": "scikit_build_core.metadata.template",
+                "result": "{project[requires-python]}",
+            },
+            "readme": {
+                "provider": "scikit_build_core.metadata.template",
+                "result": {"file": "{project[license]}"},
+            },
+            "requires-python": {
+                "provider": "scikit_build_core.metadata.template",
+                "result": ">={project[version]}",
+            },
+        },
+    )
+
+    assert pyproject["requires-python"] == ">=0.1.0"
+
+
+def test_regex() -> None:
+    pyproject = process_dynamic_metadata(
+        {
+            "name": "test",
+            "version": "0.1.0",
+            "dynamic": ["requires-python"],
+        },
+        {
+            "requires-python": {
+                "provider": "scikit_build_core.metadata.regex",
+                "input": "pyproject.toml",
+                "regex": r"name = \"(?P<name>.+)\"",
+                "result": ">={name}",
+            },
+        },
+    )
+
+    assert pyproject["requires-python"] == ">=scikit_build_core"

tests/test_settings_docs.py

@@ -0,0 +1,38 @@
+from __future__ import annotations
+
+from scikit_build_core.settings.documentation import DCDoc, mk_docs
+from scikit_build_core.settings.skbuild_docs import mk_skbuild_docs
+from scikit_build_core.settings.skbuild_model import ScikitBuildSettings
+
+
+def test_skbuild_docs() -> None:
+    docs = mk_skbuild_docs()
+    assert (
+        "A table of defines to pass to CMake when configuring the project. Additive."
+        in docs
+    )
+    assert "DEPRECATED in 0.10, use build.verbose instead." in docs
+    assert "fail = false" in docs
+
+
+def test_mk_docs() -> None:
+    docs = set(mk_docs(ScikitBuildSettings))
+
+    assert (
+        DCDoc(
+            name="cmake.minimum-version",
+            default='""',
+            docs="DEPRECATED in 0.8; use version instead.",
+            deprecated=True,
+        )
+        in docs
+    )
+    assert (
+        DCDoc(
+            name="install.strip",
+            default="true",
+            docs="Whether to strip the binaries. True for release builds on scikit-build-core 0.5+ (0.5-0.10.5 also incorrectly set this for debug builds).",
+            deprecated=False,
+        )
+        in docs
+    )