btop: add module

tests/modules/programs/btop/default.nix

@@ -0,0 +1,4 @@
+{
+  btop-example-settings = ./example-settings.nix;
+  btop-empty-settings = ./empty-settings.nix;
+}

tests/modules/programs/btop/empty-settings.nix

@@ -0,0 +1,11 @@
+{ ... }:
+
+{
+  programs.btop.enable = true;
+
+  test.stubs.btop = { };
+
+  nmt.script = ''
+    assertPathNotExists home-files/.config/btop
+  '';
+}

tests/modules/programs/btop/example-settings-expected.conf

@@ -0,0 +1,9 @@
+disks_filter = "exclude=/foo/bar"
+io_graph_combined = True
+io_graph_speeds = ""
+log_level = "DEBUG"
+show_io_stat = False
+update_ms = 1000
+
+clock_format = "%H:%M"
+

tests/modules/programs/btop/example-settings.nix

@@ -0,0 +1,34 @@
+{ config, ... }:
+
+{
+  programs.btop = {
+    enable = true;
+    package = config.lib.test.mkStubPackage { };
+
+    settings = {
+      # Integer
+      update_ms = 1000;
+
+      # Boolean
+      show_io_stat = false;
+      io_graph_combined = true;
+
+      # String
+      disks_filter = "exclude=/foo/bar";
+      log_level = "DEBUG";
+
+      # Empty string
+      io_graph_speeds = "";
+    };
+
+    extraConfig = ''
+      clock_format = "%H:%M"
+    '';
+  };
+
+  nmt.script = ''
+    assertFileContent \
+      home-files/.config/btop/btop.conf \
+      ${./example-settings-expected.conf}
+  '';
+}