add arango package with aql generation

query_test.go

@@ -0,0 +1,51 @@
+package arango
+
+import (
+	"testing"
+)
+
+func TestQueryAppend(t *testing.T) {
+	type TestCase struct {
+		Input          *Query
+		ExpectedStr    string
+		ExpectedParams map[string]any
+	}
+
+	testCases := []TestCase{
+		{
+			Input: NewQuery().
+				Append("FOR doc IN @@collection", "recipes").
+				Append("FILTER doc.title == @title", "Spaghetti").
+				Append("RETURN doc"),
+			ExpectedStr: `FOR doc IN @@collection
+FILTER doc.title == @title
+RETURN doc`,
+			ExpectedParams: map[string]any{
+				"collection": "recipes",
+				"title":      "Spaghetti",
+			},
+		},
+	}
+
+	for _, testCase := range testCases {
+		actualStr := testCase.Input.String()
+
+		if actualStr != testCase.ExpectedStr {
+			t.Logf("Expected: %q", testCase.ExpectedStr)
+			t.Logf("Actual: %q", actualStr)
+			t.Fail()
+		}
+
+		if len(testCase.Input.Params) != len(testCase.ExpectedParams) {
+			t.Errorf("Expected %d parameters; got %d", len(testCase.ExpectedParams), len(testCase.Input.Params))
+		}
+
+		for name, value := range testCase.ExpectedParams {
+			if testCase.Input.Params[name] == nil {
+				t.Errorf("Expected parameter %q to be %q; got nil", name, value)
+			} else if testCase.Input.Params[name] != value {
+				t.Errorf("Expected parameter %q to be %q; got %q", name, value, testCase.Input.Params[name])
+			}
+		}
+	}
+}