1 files changed, 26 insertions, 0 deletions
diff --git a/internal/bible/books_test.go b/internal/bible/books_test.go
new file mode 100644
index 0000000..43a67cf
--- /dev/null
+++ b/internal/bible/books_test.go
@@ -0,0 +1,26 @@
+package bible
+
+import "testing"
+
+func TestResolveBook(t *testing.T) {
+	cases := []struct{ in, want string }{
+		{"John", "John"},
+		{"Joh", "John"}, // English prefix
+		{"J", "John"},   // Polish abbrev — NOT Joshua
+		{"Łk", "Luke"},
+		{"1 Kor", "1 Corinthians"},
+		{"Jana", "John"},
+		{"Rodzaju", "Genesis"},
+		{"Mdr", "Wisdom"},
+		{"Pnp", "Song of Solomon"},
+		{"Dz", "The Acts"},
+	}
+	for _, c := range cases {
+		if got, ok := ResolveBook(c.in); !ok || got != c.want {
+			t.Errorf("ResolveBook(%q)=%q,%v want %q", c.in, got, ok, c.want)
+		}
+	}
+	if _, ok := ResolveBook("Nonsense"); ok {
+		t.Error("ResolveBook(Nonsense) should fail")
+	}
+}