add handler tests

server/handler/handler_test.go

@@ -0,0 +1,78 @@
+package handler
+
+import (
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"path"
+	"regexp"
+	"strings"
+	"testing"
+
+	"github.com/jinzhu/gorm"
+	jd "github.com/josephburnett/jd/lib"
+)
+
+var (
+	testController *Controller
+	testDataDir    = "test_data"
+	testCamelExpr  = regexp.MustCompile("([a-z0-9])([A-Z])")
+)
+
+func init() {
+	testDBPath := path.Join(testDataDir, "db")
+	testDB, err := gorm.Open("sqlite3", testDBPath)
+	if err != nil {
+		log.Fatalf("error opening database: %v\n", err)
+	}
+	testController = &Controller{DB: testDB}
+}
+
+type queryCase struct {
+	params     url.Values
+	expectPath string
+	listSet    bool
+}
+
+func testNameToPath(name string) string {
+	snake := testCamelExpr.ReplaceAllString(name, "${1}_${2}")
+	lower := strings.ToLower(snake)
+	relPath := strings.Replace(lower, "/", "_", -1)
+	return path.Join(testDataDir, relPath)
+}
+
+func testQueryCases(t *testing.T, handler http.HandlerFunc, cases []*queryCase) {
+	for _, qc := range cases {
+		t.Run(qc.expectPath, func(t *testing.T) {
+			// ensure the handlers give us json
+			qc.params.Add("f", "json")
+			req, _ := http.NewRequest("", "?"+qc.params.Encode(), nil)
+			rr := httptest.NewRecorder()
+			handler.ServeHTTP(rr, req)
+			body := rr.Body.String()
+			if status := rr.Code; status != http.StatusOK {
+				t.Fatalf("didn't give a 200\n%s", body)
+			}
+			absExpPath := testNameToPath(t.Name())
+			expected, err := jd.ReadJsonFile(absExpPath)
+			if err != nil {
+				t.Fatalf("parsing expected: %v", err)
+			}
+			actual, _ := jd.ReadJsonString(body)
+			if err != nil {
+				t.Fatalf("parsing actual: %v", err)
+			}
+			diffOpts := []jd.Metadata{}
+			if qc.listSet {
+				diffOpts = append(diffOpts, jd.SET)
+			}
+			diff := expected.Diff(actual, diffOpts...)
+			if len(diff) == 0 {
+				return
+			}
+			t.Errorf("\u001b[31;1mdiffering json\u001b[0m\n%s",
+				diff.Render())
+		})
+	}
+}