Added unit tests for CLI

internal/cli/flags_test.go

@@ -0,0 +1,79 @@
+package cli_test
+
+import (
+	"fmt"
+	"os"
+	"testing"
+
+	"git.avsdev.uk/Go/job-search/internal/cli"
+	"git.avsdev.uk/Go/job-search/internal/cli/cmdtest"
+	"github.com/spf13/cobra"
+)
+
+// The shared flags (--config, --debug and --quiet), run through a root
+// command like job-search's and a command that loads the configuration, as
+// every real command does.
+
+const appConfig = "logging:\n  level: info\n"
+
+// newRoot returns a root command with a "level" command that loads the
+// configuration and prints its log level.
+func newRoot() *cobra.Command {
+	opts := &cli.Options{}
+	return cmdtest.NewRoot(opts, &cobra.Command{
+		Use: "level",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			conf, err := opts.RunSetup(cmd, true, true)
+			if err != nil {
+				return err
+			}
+			fmt.Println("level:", conf.Logging.Level)
+			return nil
+		},
+	})
+}
+
+// --debug and --quiet override the configured log level; --debug wins.
+func TestLogLevelFlags(t *testing.T) {
+	cmdtest.Setup(t, appConfig)
+
+	for _, tt := range []struct {
+		args []string
+		want string
+	}{
+		{nil, "level: info"},
+		{[]string{"--debug"}, "level: debug"},
+		{[]string{"-d"}, "level: debug"},
+		{[]string{"--quiet"}, "level: error"},
+		{[]string{"-q"}, "level: error"},
+		{[]string{"-q", "-d"}, "level: debug"},
+	} {
+		out := cmdtest.MustRun(t, newRoot, append([]string{"level"}, tt.args...)...)
+		cmdtest.Contains(t, out, tt.want)
+	}
+}
+
+// --config points the command at another file.
+func TestConfigFlag(t *testing.T) {
+	cmdtest.Setup(t, appConfig)
+	cmdtest.WriteFile(t, "other.yaml", "logging:\n  level: error\n")
+
+	for _, flag := range []string{"--config", "-c"} {
+		out := cmdtest.MustRun(t, newRoot, "level", flag, "other.yaml")
+		cmdtest.Contains(t, out, "level: error")
+	}
+
+	_, err := cmdtest.Run(t, newRoot, "", "level", "--config", "missing.yaml")
+	if err == nil {
+		t.Error("a missing --config file was accepted")
+	}
+}
+
+func TestMissingEnvFile(t *testing.T) {
+	cmdtest.Setup(t, appConfig)
+	if err := os.Remove(".env"); err != nil {
+		t.Fatal(err)
+	}
+	_, err := cmdtest.Run(t, newRoot, "", "level")
+	cmdtest.ErrContains(t, err, ".env")
+}