Fix all tests

src/internal/context_test.go

@@ -16,11 +16,11 @@ func loadContext(file string) Context {
 	if !helpers.PathExists(path) {
 		panic(fmt.Errorf("context file not found: %q", path))
 	}
-	context, err := Load(path)
+	contexts, err := readAndParseContextFile(path)
 	if err != nil {
 		panic(fmt.Errorf("loading context from %q: %w", path, err))
 	}
-	return context.Context
+	return contexts.Context
 }
 
 func assertNotSameMapStringString(t *testing.T, map1, map2 map[string]string, msgAndArgs ...interface{}) {

src/internal/contexts.go

@@ -15,28 +15,24 @@ type Contexts struct {
 	contexts map[string]Context
 }
 
-// Clone returns a deep-copy of this object
-func (c Contexts) Clone() Contexts {
-	clone := c
-	for key, value := range c.contexts {
-		clone.contexts[key] = value.Clone()
-	}
-	return clone
-}
-
 // Merge creates a deep-copy of this object and copies values from given source object on top of it
 func (c Contexts) Merge(source Contexts) Contexts {
-	clone := c.Clone()
-	clone.Context.Merge(source.Context)
+	merged := Contexts{
+		Context:  c.Context.Merge(source.Context),
+		contexts: make(map[string]Context),
+	}
+	for key, value := range c.contexts {
+		merged.contexts[key] = value.Clone()
+	}
 	for key, value := range source.contexts {
-		existing, ok := clone.contexts[key]
+		existing, ok := merged.contexts[key]
 		if ok {
-			c.contexts[key] = existing.Merge(value)
+			merged.contexts[key] = existing.Merge(value)
 		} else {
-			c.contexts[key] = value
+			merged.contexts[key] = value
 		}
 	}
-	return clone
+	return merged
 }
 
 // GetContextNames returns the list of all context names user can choose from,