From d75b631434956cb82d0db4854a5a28f56b4b0ddc Mon Sep 17 00:00:00 2001
From: Jake Bailey <5341706+jakebailey@users.noreply.github.com>
Date: Wed, 14 Sep 2022 12:43:45 -0700
Subject: [PATCH] Add test

---
 ...tionEmitDuplicateParameterDestructuring.js | 46 +++++++++++++++++++
 ...mitDuplicateParameterDestructuring.symbols | 22 +++++++++
 ...nEmitDuplicateParameterDestructuring.types | 26 +++++++++++
 ...tionEmitDuplicateParameterDestructuring.ts |  6 +++
 4 files changed, 100 insertions(+)
 create mode 100644 tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.js
 create mode 100644 tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.symbols
 create mode 100644 tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.types
 create mode 100644 tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts

diff --git a/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.js b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.js
new file mode 100644
index 0000000000000..85c275a730bf0
--- /dev/null
+++ b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.js
@@ -0,0 +1,46 @@
+//// [declarationEmitDuplicateParameterDestructuring.ts]
+export const fn1 = ({ prop: a, prop: b }: { prop: number }) => a + b;
+
+export const fn2 = ({ prop: a }: { prop: number }, { prop: b }: { prop: number }) => a + b;
+
+
+
+
+//// [declarationEmitDuplicateParameterDestructuring.d.ts]
+export declare const fn1: ({ prop, prop }: {
+    prop: number;
+}) => number;
+export declare const fn2: ({ prop }: {
+    prop: number;
+}, { prop }: {
+    prop: number;
+}) => number;
+
+
+//// [DtsFileErrors]
+
+
+tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.d.ts(1,30): error TS2300: Duplicate identifier 'prop'.
+tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.d.ts(1,36): error TS2300: Duplicate identifier 'prop'.
+tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.d.ts(4,30): error TS2300: Duplicate identifier 'prop'.
+tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.d.ts(6,6): error TS2300: Duplicate identifier 'prop'.
+
+
+==== tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.d.ts (4 errors) ====
+    export declare const fn1: ({ prop, prop }: {
+                                 ~~~~
+!!! error TS2300: Duplicate identifier 'prop'.
+                                       ~~~~
+!!! error TS2300: Duplicate identifier 'prop'.
+        prop: number;
+    }) => number;
+    export declare const fn2: ({ prop }: {
+                                 ~~~~
+!!! error TS2300: Duplicate identifier 'prop'.
+        prop: number;
+    }, { prop }: {
+         ~~~~
+!!! error TS2300: Duplicate identifier 'prop'.
+        prop: number;
+    }) => number;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.symbols b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.symbols
new file mode 100644
index 0000000000000..ed7d395d452ca
--- /dev/null
+++ b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.symbols
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts ===
+export const fn1 = ({ prop: a, prop: b }: { prop: number }) => a + b;
+>fn1 : Symbol(fn1, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 12))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 43))
+>a : Symbol(a, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 21))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 43))
+>b : Symbol(b, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 30))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 43))
+>a : Symbol(a, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 21))
+>b : Symbol(b, Decl(declarationEmitDuplicateParameterDestructuring.ts, 0, 30))
+
+export const fn2 = ({ prop: a }: { prop: number }, { prop: b }: { prop: number }) => a + b;
+>fn2 : Symbol(fn2, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 12))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 34))
+>a : Symbol(a, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 21))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 34))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 65))
+>b : Symbol(b, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 52))
+>prop : Symbol(prop, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 65))
+>a : Symbol(a, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 21))
+>b : Symbol(b, Decl(declarationEmitDuplicateParameterDestructuring.ts, 2, 52))
+
diff --git a/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.types b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.types
new file mode 100644
index 0000000000000..271da5f139fd9
--- /dev/null
+++ b/tests/baselines/reference/declarationEmitDuplicateParameterDestructuring.types
@@ -0,0 +1,26 @@
+=== tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts ===
+export const fn1 = ({ prop: a, prop: b }: { prop: number }) => a + b;
+>fn1 : ({ prop, prop }: {    prop: number;}) => number
+>({ prop: a, prop: b }: { prop: number }) => a + b : ({ prop, prop }: {    prop: number;}) => number
+>prop : any
+>a : number
+>prop : any
+>b : number
+>prop : number
+>a + b : number
+>a : number
+>b : number
+
+export const fn2 = ({ prop: a }: { prop: number }, { prop: b }: { prop: number }) => a + b;
+>fn2 : ({ prop }: {    prop: number;}, { prop }: {    prop: number;}) => number
+>({ prop: a }: { prop: number }, { prop: b }: { prop: number }) => a + b : ({ prop }: {    prop: number;}, { prop }: {    prop: number;}) => number
+>prop : any
+>a : number
+>prop : number
+>prop : any
+>b : number
+>prop : number
+>a + b : number
+>a : number
+>b : number
+
diff --git a/tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts b/tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts
new file mode 100644
index 0000000000000..12f3ce9aa2bc8
--- /dev/null
+++ b/tests/cases/compiler/declarationEmitDuplicateParameterDestructuring.ts
@@ -0,0 +1,6 @@
+// @declaration: true
+// @emitDeclarationOnly: true
+
+export const fn1 = ({ prop: a, prop: b }: { prop: number }) => a + b;
+
+export const fn2 = ({ prop: a }: { prop: number }, { prop: b }: { prop: number }) => a + b;