core: harden watch-order relations

internal/jikan/relations_test.go

@@ -0,0 +1,48 @@
+package jikan
+
+import "testing"
+
+func TestIsAllowedWatchOrderType(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  bool
+	}{
+		{name: "tv", input: "tv", want: true},
+		{name: "movie", input: "movie", want: true},
+		{name: "case and whitespace", input: "  TV  ", want: true},
+		{name: "tv special", input: "tv special", want: false},
+		{name: "ova", input: "ova", want: false},
+		{name: "empty", input: "", want: false},
+	}
+
+	for _, testCase := range tests {
+		t.Run(testCase.name, func(t *testing.T) {
+			got := isAllowedWatchOrderType(testCase.input)
+			if got != testCase.want {
+				t.Fatalf("expected %v, got %v", testCase.want, got)
+			}
+		})
+	}
+}
+
+func TestWatchOrderTypeLabel(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		want  string
+	}{
+		{name: "tv", input: "tv", want: "TV"},
+		{name: "movie", input: "movie", want: "Movie"},
+		{name: "trimmed passthrough", input: "  tv special  ", want: "tv special"},
+	}
+
+	for _, testCase := range tests {
+		t.Run(testCase.name, func(t *testing.T) {
+			got := watchOrderTypeLabel(testCase.input)
+			if got != testCase.want {
+				t.Fatalf("expected %q, got %q", testCase.want, got)
+			}
+		})
+	}
+}