1 files changed, 51 insertions, 0 deletions
diff --git a/internal/cli/cli_test.go b/internal/cli/cli_test.go
new file mode 100644
index 0000000..85097ed
--- /dev/null
+++ b/internal/cli/cli_test.go
@@ -0,0 +1,51 @@
+package cli
+
+import (
+	"bytes"
+	"strings"
+	"testing"
+)
+
+func TestHelp(t *testing.T) {
+	var out, errb bytes.Buffer
+	code := Run([]string{"help"}, nil, &out, &errb)
+	if code != 0 || !strings.Contains(out.String(), "lectio") {
+		t.Errorf("help code=%d out=%q", code, out.String())
+	}
+}
+
+func TestUnknownCommand(t *testing.T) {
+	var out, errb bytes.Buffer
+	if code := Run([]string{"bogus"}, nil, &out, &errb); code != 2 {
+		t.Errorf("unknown cmd code=%d want 2", code)
+	}
+}
+
+func TestVersion(t *testing.T) {
+	var out, errb bytes.Buffer
+	if code := Run([]string{"--version"}, nil, &out, &errb); code != 0 {
+		t.Errorf("version code=%d", code)
+	}
+}
+
+// TestBadDate exercises the "date" subcommand's usage-error path (bad
+// YYYY-MM-DD format) without touching the network: format validation
+// happens before any fetch is attempted.
+func TestBadDate(t *testing.T) {
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+	var out, errb bytes.Buffer
+	if code := Run([]string{"date", "13-13-13"}, nil, &out, &errb); code != 2 {
+		t.Errorf("bad date code=%d want 2 (stderr=%q)", code, errb.String())
+	}
+}
+
+// TestUnknownVersion exercises "show"'s version-validation usage-error path
+// without touching the network: the version code is checked against the
+// five known codes before any fetch is attempted.
+func TestUnknownVersion(t *testing.T) {
+	t.Setenv("XDG_CONFIG_HOME", t.TempDir())
+	var out, errb bytes.Buffer
+	if code := Run([]string{"show", "zzz"}, nil, &out, &errb); code != 2 {
+		t.Errorf("unknown version code=%d want 2 (stderr=%q)", code, errb.String())
+	}
+}