Add test for search/web/web.go

search/web/web_test.go

@@ -0,0 +1,198 @@
+package web_test
+
+import (
+	"errors"
+	"testing"
+
+	"go.arsenm.dev/scope/search/web"
+)
+
+const (
+	ErrInNone = iota
+	ErrInInit
+	ErrInLink
+	ErrInTitle
+	ErrInDesc
+)
+
+var (
+	ErrInit  = errors.New("error in init")
+	ErrLink  = errors.New("error in link")
+	ErrTitle = errors.New("error in title")
+	ErrDesc  = errors.New("error in description")
+)
+
+type TestEngine struct {
+	errIn     int
+	name      string
+	query     string
+	userAgent string
+	page      int
+	results   []TestResult
+}
+
+type TestResult struct {
+	title string
+	link  string
+	desc  string
+}
+
+func (te *TestEngine) SetKeyword(query string) {
+	te.query = query
+}
+
+func (te *TestEngine) SetUserAgent(ua string) {
+	te.userAgent = ua
+}
+
+func (te *TestEngine) SetPage(page int) {
+	te.page = page
+}
+
+func (te *TestEngine) Init() error {
+	if te.errIn == ErrInInit {
+		return ErrInit
+	}
+	te.results = append(te.results,
+		TestResult{
+			"Google",
+			"https://www.google.com",
+			"Google search engine",
+		},
+		TestResult{
+			"Wikipedia",
+			"https://wikipedia.org",
+			"Online wiki encyclopedia",
+		},
+		TestResult{
+			"Reddit",
+			"https://reddit.com",
+			"600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars 600 chars ",
+		},
+		TestResult{
+			"Example",
+			"https://example.com",
+			"",
+		},
+	)
+	return nil
+}
+
+func (te *TestEngine) Each(eachCb func(int) error) error {
+	for index := range te.results {
+		if err := eachCb(index); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (te *TestEngine) Title(i int) (string, error) {
+	if te.errIn == ErrInTitle {
+		return "", ErrTitle
+	}
+	return te.results[i].title, nil
+}
+
+func (te *TestEngine) Link(i int) (string, error) {
+	if te.errIn == ErrInLink {
+		return "", ErrLink
+	}
+	return te.results[i].link, nil
+}
+
+func (te *TestEngine) Desc(i int) (string, error) {
+	if te.errIn == ErrInDesc {
+		return "", ErrDesc
+	}
+	return te.results[i].desc, nil
+}
+
+func (te *TestEngine) Name() string {
+	return te.name
+}
+
+func TestSearch(t *testing.T) {
+	engine := &TestEngine{name: "one"}
+
+	results, err := web.Search(
+		web.Options{
+			Keyword:   "test keyword",
+			UserAgent: "TestEngine/0.0.0",
+			Page:      0,
+		},
+		engine,
+		&TestEngine{name: "two"},
+	)
+	if err != nil {
+		t.Fatalf("Error in Search(): %s", err)
+	}
+
+	if len(results) < len(engine.results)-1 {
+		t.Fatalf(
+			"Expected %d results, got %d",
+			len(engine.results),
+			len(results),
+		)
+	}
+
+	for index, result := range results {
+		if engine.results[index].desc == "" {
+			continue
+		}
+		if result.Title != engine.results[index].title {
+			t.Fatalf(
+				"Result %d: expected title %s, got %s",
+				index,
+				engine.results[index].title,
+				result.Title,
+			)
+		} else if result.Link != engine.results[index].link {
+			t.Fatalf(
+				"Result %d: expected link %s, got %s",
+				index,
+				engine.results[index].link,
+				result.Link,
+			)
+		} else if result.Desc != engine.results[index].desc &&
+			len(engine.results[index].desc) <= 500 {
+			t.Fatalf(
+				"Result %d: expected description %s, got %s",
+				index,
+				engine.results[index].desc,
+				result.Desc,
+			)
+		}
+	}
+}
+
+func TestSearchError(t *testing.T) {
+	var engines = []*TestEngine{
+		{errIn: ErrInInit},
+		{errIn: ErrInTitle},
+		{errIn: ErrInLink},
+		{errIn: ErrInDesc},
+	}
+
+	for index, engine := range engines {
+		_, err := web.Search(
+			web.Options{
+				Keyword:   "test keyword",
+				UserAgent: "TestEngine/0.0.0",
+				Page:      0,
+			},
+			engine,
+		)
+		if err == nil {
+			t.Fatalf("Expected error in engine %d, received nil", index)
+		} else if err != ErrTitle && engines[index].errIn == ErrInTitle {
+			t.Fatalf("Expected error in title (index %d), received %s", index, err)
+		} else if err != ErrLink && engines[index].errIn == ErrInLink {
+			t.Fatalf("Expected error in link (index %d), received %s", index, err)
+		} else if err != ErrDesc && engines[index].errIn == ErrInDesc {
+			t.Fatalf("Expected error in description (index %d), received %s", index, err)
+		} else if err != ErrInit && engines[index].errIn == ErrInInit {
+			t.Fatalf("Expected error in init (index %d), received %s", index, err)
+		}
+	}
+}