How to use the @aws-cdk/cloudformation-diff.ResourceImpact function in @aws-cdk/cloudformation-diff
To help you get started, we’ve selected a few @aws-cdk/cloudformation-diff examples, based on popular ways it is used in public projects.
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aws / aws-cdk / packages / @aws-cdk / assert / lib / assertions / match-template.ts View on Github 
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact === cfnDiff.ResourceImpact.MAY_REPLACE) { return false; }
if (change.changeImpact === cfnDiff.ResourceImpact.WILL_REPLACE) { return false; }
}
for (const change of Object.values(diff.parameters.changes)) {
if (change.isUpdate) { return false; }
}
for (const change of Object.values(diff.outputs.changes)) {
if (change.isUpdate) { return false; }
}
return true;
case MatchStyle.SUPERSET:
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact !== cfnDiff.ResourceImpact.WILL_CREATE) { return false; }
}
for (const change of Object.values(diff.parameters.changes)) {
if (change.isAddition) { return false; }
}
for (const change of Object.values(diff.outputs.changes)) {
if (change.isAddition || change.isUpdate) { return false; }
}
return true;
}
throw new Error(`Unsupported match style: ${this.matchStyle}`);
}private isDiffAcceptable(diff: cfnDiff.TemplateDiff): boolean {
switch (this.matchStyle) {
case MatchStyle.EXACT:
return diff.differenceCount === 0;
case MatchStyle.NO_REPLACES:
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact === cfnDiff.ResourceImpact.MAY_REPLACE) { return false; }
if (change.changeImpact === cfnDiff.ResourceImpact.WILL_REPLACE) { return false; }
}
for (const change of Object.values(diff.parameters.changes)) {
if (change.isUpdate) { return false; }
}
for (const change of Object.values(diff.outputs.changes)) {
if (change.isUpdate) { return false; }
}
return true;
case MatchStyle.SUPERSET:
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact !== cfnDiff.ResourceImpact.WILL_CREATE) { return false; }
}
for (const change of Object.values(diff.parameters.changes)) {private isDiffAcceptable(diff: cfnDiff.TemplateDiff): boolean {
switch (this.matchStyle) {
case MatchStyle.EXACT:
return diff.differenceCount === 0;
case MatchStyle.NO_REPLACES:
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact === cfnDiff.ResourceImpact.MAY_REPLACE) { return false; }
if (change.changeImpact === cfnDiff.ResourceImpact.WILL_REPLACE) { return false; }
}
for (const change of Object.values(diff.parameters.changes)) {
if (change.isUpdate) { return false; }
}
for (const change of Object.values(diff.outputs.changes)) {
if (change.isUpdate) { return false; }
}
return true;
case MatchStyle.SUPERSET:
for (const change of Object.values(diff.resources.changes)) {
if (change.changeImpact !== cfnDiff.ResourceImpact.WILL_CREATE) { return false; }
}@aws-cdk/cloudformation-diff
Utilities to diff CDK stacks against CloudFormation templates
