mock: Add mock config interface

mock/config.go

@@ -0,0 +1,26 @@
+package mock
+
+import "iter"
+import "git.tebibyte.media/sashakoshka/camfish"
+
+var _ camfish.Config = new(Config)
+
+// Config implements camfish.Config.
+type Config map[string] []string
+
+func (config Config) Get(key string) string {
+	list, ok := config[key]
+	if !ok            { return "" }
+	if len(list) == 0 { return "" }
+	return list[0]
+}
+
+func (config Config) GetAll(key string) iter.Seq2[int, string] {
+	return func(yield func(int, string) bool) {
+		list, ok := config[key]
+		if !ok { return }
+		for index, value := range list {
+			yield(index, value)
+		}
+	}
+}

mock/config_test.go

@@ -0,0 +1,46 @@
+package mock
+
+import "testing"
+
+func TestConfig(test *testing.T) {
+	config := Config {
+		"single": []string { "aslkdjasd" },
+		"multiple": []string { "item0", "item1" },
+		"empty": []string { },
+	}
+	if correct, got := config.Get("single"), "aslkdjasd"; correct != got {
+		test.Fatal("not equal:", got)
+	}
+	if correct, got := config.Get("multiple"), "item0"; correct != got {
+		test.Fatal("not equal:", got)
+	}
+	if correct, got := config.Get("empty"), ""; correct != got {
+		test.Fatal("not equal:", got)
+	}
+	if correct, got := config.Get("non-existent"), ""; correct != got {
+		test.Fatal("not equal:", got)
+	}
+	for index, value := range config.GetAll("single") {
+		if index < 0 { test.Fatal("index too small") }
+		if index > 0 { test.Fatal("index too large") }
+		if value != "aslkdjasd" {
+			test.Fatal("not equal:", value)
+		}
+	}
+	for index, value := range config.GetAll("multiple") {
+		if index < 0 { test.Fatal("index too small") }
+		if index > 1 { test.Fatal("index too large") }
+		switch value {
+		case "item0": if index != 0 { test.Fatal("not equal:", index, value) }
+		case "item1": if index != 1 { test.Fatal("not equal:", index, value) }
+		default:
+			test.Fatal("should not have value:", index, value)
+		}
+	}
+	for index, value := range config.GetAll("empty") {
+		test.Fatal("should not have value:", index, value)
+	}
+	for index, value := range config.GetAll("non-existent") {
+		test.Fatal("should not have value:", index, value)
+	}
+}

mock/doc.go

@@ -0,0 +1,3 @@
+// Package mock implements mock interface implementations and other utilities
+// for testing actors.
+package mock