Select history using matched entry positions

internal/engine/resolution_compare_test.go

@@ -265,3 +265,48 @@ func TestRegisteredResolutionValidationLocationFollowsMovedRecord(t *testing.T)
 	}
 	t.Fatalf("diagnostics = %#v", failure.Diagnostics())
 }
+
+func TestRegisteredResolutionHistoryFollowsMatchedSource(t *testing.T) {
+	type item struct {
+		ID    string `yaml:"id"`
+		Value string `yaml:"value"`
+	}
+	type config struct {
+		Items []item `yaml:"items"`
+	}
+	definition := DefinitionWithSequenceIdentityRegistrations(Definition[config]{Resolve: func(value *config, r *Resolution) error {
+		value.Items[0], value.Items[1] = value.Items[1], value.Items[0]
+		value.Items = append(value.Items, item{ID: "new", Value: "added"})
+		r.RecordNormalization(Keys("items"), "reorder and add")
+		return nil
+	}}, []SequenceIdentityRegistrationInput{{ExactPath: pathPointer(Keys("items")), IdentityFields: []string{"id"}}})
+	result, err := testLoad(Bytes("records", []byte("items:\n  - id: a\n    value: first\n  - id: b\n    value: second\n")), Options[config]{Definition: definition})
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, check := range []struct{ index, line int }{{0, 5}, {1, 3}} {
+		path := Keys("items").Index(check.index).Key("value")
+		if location, ok := result.history.latestHistoricalLocation(path); !ok || location.Line != check.line {
+			t.Errorf("historical location for %s = %#v, %t", path.String(), location, ok)
+		}
+		history := result.Metadata().History(path)
+		found := false
+		for _, change := range history {
+			for _, location := range change.Origin.Locations {
+				if location.Line == check.line {
+					found = true
+				} else if location.Line == 3 || location.Line == 5 {
+					t.Errorf("wrong record in %s: %#v", path.String(), history)
+				}
+			}
+		}
+		if !found {
+			t.Errorf("missing source line %d in %#v", check.line, history)
+		}
+	}
+	for _, change := range result.Metadata().History(Keys("items").Index(2).Key("value")) {
+		if change.Origin.Layer == LayerMain {
+			t.Fatalf("added record inherited input: %#v", change)
+		}
+	}
+}