test: add comprehensive lib package coveragecodex/add-unit-tests-lib-package

1 files changed, 139 insertions, 0 deletions

diff --git a/lib/common_test.go b/lib/common_test.go
new file mode 100644
index 00000000..71d55cc5
--- /dev/null
+++ b/lib/common_test.go
@@ -0,0 +1,139 @@
+package lib
+
+import (
+	"io"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestGetRemoteURLContent(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write([]byte("hello"))
+		}))
+		defer s.Close()
+
+		data, err := GetRemoteURLContent(s.URL)
+		if err != nil {
+			t.Fatalf("GetRemoteURLContent() error = %v", err)
+		}
+		if string(data) != "hello" {
+			t.Fatalf("GetRemoteURLContent() = %s, want %s", data, "hello")
+		}
+	})
+
+	t.Run("status error", func(t *testing.T) {
+		s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.WriteHeader(http.StatusBadGateway)
+		}))
+		defer s.Close()
+
+		if _, err := GetRemoteURLContent(s.URL); err == nil {
+			t.Fatalf("expected error for non-200 response")
+		}
+	})
+
+	t.Run("request error", func(t *testing.T) {
+		if _, err := GetRemoteURLContent("http://[%"); err == nil {
+			t.Fatalf("expected error for invalid URL")
+		}
+	})
+}
+
+func TestGetRemoteURLReader(t *testing.T) {
+	t.Run("success", func(t *testing.T) {
+		s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.WriteHeader(http.StatusOK)
+			_, _ = w.Write([]byte("world"))
+		}))
+		defer s.Close()
+
+		rc, err := GetRemoteURLReader(s.URL)
+		if err != nil {
+			t.Fatalf("GetRemoteURLReader() error = %v", err)
+		}
+		defer rc.Close()
+
+		data, err := io.ReadAll(rc)
+		if err != nil {
+			t.Fatalf("unexpected read error: %v", err)
+		}
+		if string(data) != "world" {
+			t.Fatalf("GetRemoteURLReader() = %s, want %s", data, "world")
+		}
+	})
+
+	t.Run("status error", func(t *testing.T) {
+		s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+			w.WriteHeader(http.StatusBadRequest)
+		}))
+		defer s.Close()
+
+		if rc, err := GetRemoteURLReader(s.URL); err == nil {
+			rc.Close()
+			t.Fatalf("expected error for non-200 response")
+		}
+	})
+
+	t.Run("request error", func(t *testing.T) {
+		if _, err := GetRemoteURLReader("http://[%"); err == nil {
+			t.Fatalf("expected error for invalid URL")
+		}
+	})
+}
+
+func TestGetIgnoreIPType(t *testing.T) {
+	if fn := GetIgnoreIPType(IPv4); fn == nil || fn() != IPv6 {
+		t.Fatalf("GetIgnoreIPType(IPv4) = %v", fn)
+	}
+	if fn := GetIgnoreIPType(IPv6); fn == nil || fn() != IPv4 {
+		t.Fatalf("GetIgnoreIPType(IPv6) = %v", fn)
+	}
+	if fn := GetIgnoreIPType(IPType("other")); fn != nil {
+		t.Fatalf("GetIgnoreIPType(other) = %v, want nil", fn)
+	}
+}
+
+func TestWantedListExtendedUnmarshalJSON(t *testing.T) {
+	t.Run("slice input", func(t *testing.T) {
+		var w WantedListExtended
+		if err := w.UnmarshalJSON([]byte(`["a","b"]`)); err != nil {
+			t.Fatalf("UnmarshalJSON() error = %v", err)
+		}
+		if len(w.TypeSlice) != 2 || w.TypeSlice[0] != "a" || w.TypeSlice[1] != "b" {
+			t.Fatalf("TypeSlice = %#v", w.TypeSlice)
+		}
+		if len(w.TypeMap) != 0 {
+			t.Fatalf("TypeMap should be empty, got %#v", w.TypeMap)
+		}
+	})
+
+	t.Run("map input", func(t *testing.T) {
+		var w WantedListExtended
+		if err := w.UnmarshalJSON([]byte(`{"x":["y"]}`)); err != nil {
+			t.Fatalf("UnmarshalJSON() error = %v", err)
+		}
+		if len(w.TypeSlice) != 0 {
+			t.Fatalf("TypeSlice should be empty, got %#v", w.TypeSlice)
+		}
+		if got := w.TypeMap["x"]; len(got) != 1 || got[0] != "y" {
+			t.Fatalf("TypeMap = %#v", w.TypeMap)
+		}
+	})
+
+	t.Run("invalid input", func(t *testing.T) {
+		var w WantedListExtended
+		if err := w.UnmarshalJSON([]byte(`123`)); err == nil {
+			t.Fatalf("expected error for invalid json")
+		}
+	})
+
+	t.Run("empty input", func(t *testing.T) {
+		var w WantedListExtended
+		if err := w.UnmarshalJSON([]byte(``)); err != nil {
+			t.Fatalf("UnmarshalJSON() error = %v", err)
+		}
+	})
+}