add basic tests (#73)

Author: zimbatm

default.nix

@@ -11,6 +11,9 @@ rec {
   # Docs
   docs = pkgs.callPackage ./docs { inherit modules-docs; };
 
+  # Tests
+  tests = import ./tests { inherit pkgs system; };
+
   # Evaluate the devshell module
   eval = import ./modules pkgs;
 

tests/default.nix

@@ -0,0 +1,12 @@
+{ system ? builtins.currentSystem
+, pkgs ? import (import ../nix/nixpkgs.nix) { inherit system; }
+}:
+let
+  devshell = import ../. { inherit pkgs; };
+  attrs = { inherit pkgs devshell; };
+in
+{ recurseForDerivations = true; }
+// (import ./devshell.nix attrs)
+// (import ./git-hooks.nix attrs)
+// (import ./modules-docs.nix attrs)
+  // { }

tests/devshell.nix

@@ -0,0 +1,26 @@
+{ pkgs, devshell }:
+{
+  # Basic devshell usage
+  devshell-1 =
+    let
+      shell = devshell.mkShell {
+        devshell.name = "devshell-1";
+        devshell.packages = [ pkgs.git ];
+      };
+    in
+    pkgs.runCommand "devshell-1" { } ''
+      # Load the devshell
+      source ${shell}
+
+      # Sets an environment variable that points to the buildEnv
+      [[ -n $DEVSHELL_DIR ]]
+
+      # Points DEVSHELL_ROOT to the project root
+      [[ $PWD == "$DEVSHELL_ROOT" ]]
+
+      # Adds packages to the PATH
+      type -p git
+
+      touch $out
+    '';
+}

tests/git-hooks.nix

@@ -0,0 +1,43 @@
+{ pkgs, devshell }:
+{
+  # Basic git.hooks module tests
+  git-hooks-1 =
+    let
+      shell1 = devshell.mkShell {
+        devshell.name = "git-hooks-1a";
+        git.hooks.enable = true;
+        git.hooks.pre-commit.text = ''
+          #!${pkgs.bash}/bin/bash
+          echo "PRE-COMMIT"
+        '';
+      };
+
+      shell2 = devshell.mkShell {
+        devshell.name = "git-hooks-1b";
+        git.hooks.enable = true;
+      };
+    in
+    pkgs.runCommand "git-hooks-1" { nativeBuildInputs = [ pkgs.git ]; } ''
+      git init
+
+      # The hook doesn't exist yet
+      [[ ! -L .git/hooks/pre-commit ]]
+
+      # Load the devshell
+      source ${shell1}
+
+      # The hook has been install
+      [[ -L .git/hooks/pre-commit ]]
+
+      # The hook outputs what we want
+      [[ $(.git/hooks/pre-commit) == "PRE-COMMIT" ]]
+
+      # Load the new config
+      source ${shell2}
+
+      # The hook should have been uninstalled
+      [[ ! -L .git/hooks/pre-commit ]]
+
+      touch $out
+    '';
+}

tests/modules-docs.nix

@@ -1,29 +1,17 @@
-{ system ? builtins.currentSystem }:
-let
-  nixpkgs = import ../nix/nixpkgs.nix;
+{ pkgs, devshell }:
+{
+  modules-docs-1 =
+    let
+      shell = devshell.mkShell {
+        devshell.name = "modules-docs";
+      };
+    in
+    pkgs.runCommand "modules-docs-1" { } ''
+      # The Markdown gets generated and is a derivation
+      [[ ${toString shell.config.modules-docs.markdown} == /nix/store/* ]]
 
-  pkgs = import nixpkgs {
-    config = { };
-    overlays = [ ];
-  };
+      echo "Markdown has been generated"
 
-  configuration = with pkgs.lib; {
-    config.modules-docs.baseURL = "https://example.com";
-
-    options.test = mkOption {
-      type = types.str;
-      default = "XXX";
-      description = ''
-        This is a description.
-      '';
-    };
-  };
-
-  module = pkgs.lib.evalModules {
-    modules = [ ../modules/modules-docs.nix configuration ];
-    specialArgs = {
-      modulesPath = builtins.toString ../modules;
-    };
-  };
-in
-module
+      touch $out
+    '';
+}