core: Update parameter defaulting behavior for error/warning/notice to honor an empty object passed in

packages/core/__tests__/core.test.ts

@@ -421,6 +421,12 @@ describe('@actions/core', () => {
     ])
   })
 
+  it('error handles an error object and an empty properties', () => {
+    const message = 'this is my error message'
+    core.error(new Error(message), {})
+    assertWriteCalls([`::error::Error: ${message}${os.EOL}`])
+  })
+
   it('error handles custom properties correctly', () => {
     const message = 'this is my error message'
     core.error(new Error(message), {
@@ -456,6 +462,12 @@ describe('@actions/core', () => {
     ])
   })
 
+  it('warning handles an error object and an empty properties', () => {
+    const message = 'this is my error message'
+    core.warning(new Error(message), {})
+    assertWriteCalls([`::warning::Error: ${message}${os.EOL}`])
+  })
+
   it('warning handles custom properties correctly', () => {
     const message = 'this is my error message'
     core.warning(new Error(message), {
@@ -491,6 +503,12 @@ describe('@actions/core', () => {
     ])
   })
 
+  it('notice handles an error object and an empty properties', () => {
+    const message = 'this is my error message'
+    core.notice(new Error(message), {})
+    assertWriteCalls([`::notice::Error: ${message}${os.EOL}`])
+  })
+
   it('notice handles custom properties correctly', () => {
     const message = 'this is my error message'
     core.notice(new Error(message), {

packages/core/src/core.ts

@@ -245,6 +245,21 @@ export function debug(message: string): void {
   issueCommand('debug', {}, message)
 }
 
+function defaultAnnotationPropertes(
+  message: string | Error,
+  properties: AnnotationProperties | undefined = undefined
+): AnnotationProperties {
+  // If no properties are provided, try to extract them from the Error instance
+  if (properties === undefined) {
+    if (message instanceof Error) {
+      properties = toAnnotationProperties(message)
+    } else {
+      properties = {}
+    }
+  }
+  return properties
+}
+
 /**
  * Adds an error issue
  * @param message error issue message. Errors will be converted to string via toString()
@@ -252,13 +267,9 @@ export function debug(message: string): void {
  */
 export function error(
   message: string | Error,
-  properties: AnnotationProperties = {}
+  properties: AnnotationProperties | undefined = undefined
 ): void {
-  // If no properties are provided, try to extract them from the Error instance
-  properties =
-    Object.keys(properties).length === 0 && message instanceof Error
-      ? toAnnotationProperties(message)
-      : properties
+  properties = defaultAnnotationPropertes(message, properties)
 
   issueCommand(
     'error',
@@ -274,13 +285,9 @@ export function error(
  */
 export function warning(
   message: string | Error,
-  properties: AnnotationProperties = {}
+  properties: AnnotationProperties | undefined = undefined
 ): void {
-  // If no properties are provided, try to extract them from the Error instance
-  properties =
-    Object.keys(properties).length === 0 && message instanceof Error
-      ? toAnnotationProperties(message)
-      : properties
+  properties = defaultAnnotationPropertes(message, properties)
 
   issueCommand(
     'warning',
@@ -296,13 +303,9 @@ export function warning(
  */
 export function notice(
   message: string | Error,
-  properties: AnnotationProperties = {}
+  properties: AnnotationProperties | undefined = undefined
 ): void {
-  // If no properties are provided, try to extract them from the Error instance
-  properties =
-    Object.keys(properties).length === 0 && message instanceof Error
-      ? toAnnotationProperties(message)
-      : properties
+  properties = defaultAnnotationPropertes(message, properties)
 
   issueCommand(
     'notice',